# Quantum Computing Current Events

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Is quantum computing scalable?

Debbie Leung, a fellow in CIFAR's Quantum Information Science program and a faculty member at the University of Waterloo's Institute for Quantum Computing, will discuss the challenges of scaling quantum computing at the AAAS meeting on Feb. 16. (2019-02-16)

Quantum algorithm breakthrough

An international research group led by scientists from the University of Bristol, UK, and the University of Queensland, Australia, has demonstrated a quantum algorithm that performs a true calculation for the first time. Quantum algorithms could one day enable the design of new materials, pharmaceuticals or clean energy devices. (2013-02-24)

RMIT researchers make leap in measuring quantum states

Researchers have developed self-guided quantum tomography which uses a search algorithm to iteratively 'find' the quantum state. This technique significantly reduces the necessary resources by removing the need for any data storage or post-processing. (2016-07-21)

Nobel prize winner Dr. Anthony Leggett merges quantum computing theory and application in new book

Kluwer Academic Publishers today announced the anticipated release of 2003 Nobel Prize winner Dr. Anthony Leggett's book Quantum Computing and Quantum Bits in Mesoscopic Systems. Co-edited with Dr. Berardo Ruggiero of the Instituto di Cibernetica del CNR in Italy and Dr. Paolo Silverstini of the Seconda Universita degli Studi di Napoli in Aversa, Italy, the book is heralded as a comprehensive work on theoretical quantum physics and a significant leap forward in its practical implementation. (2004-01-14)

Simultaneous detection of multiple spin states in a single quantum dot

Osaka University-led researchers achieved single-shot readout of three two-electron spin states of a single quantum dot. This is the first example of simultaneous detection of multiple spin states in a single quantum dot. The team measured the change in current of a quantum point contact charge sensor near a quantum dot, which depended on both spin state and spin-orbital interactions. Their findings represent a step forward on the path to realizing quantum computing. (2017-03-13)

Quantum computing is coming -- are you prepared for it?

Quantum computing will change lives, society and the economy and a working system is expected to be developed by 2020 according to a leading figure in the world of quantum computing, who will talk tomorrow at the World Economic Forum in Davos, Switzerland. (2016-01-20)

Spotlight on quantum computing at SXSW 2018

South by Southwest 2018 hosts a panel on March 10th called Quantum Computing: Science Fiction to Science Fact. Experts on quantum computing make up the panel, including Antia Lamas-Linares of the Texas Advanced Computing Center at UT Austin. Lamas-Linares co-authored a study in the Proceedings of the SPIE (February, 2018). The study, 'Secure Quantum Clock Synchronization,' proposed a protocol to verify and secure time synchronization of distant atomic clocks, such as those used for GPS signals in cell phone towers. (2018-03-09)

Prototype of most advanced quantum memory presented by two Kazan universities

In this paper we experimentally demonstrated a broadband scheme of the multiresonator quantum memory-interface. The microwave photonic scheme consists of the system of mini-resonators strongly interacting with a common broadband resonator coupled with the external waveguide. We have implemented the impedance matched quantum storage in this scheme via controllable tuning of the mini-resonator frequencies and coupling of the common resonator with the external waveguide. (2018-04-11)

Slicing optical beams: Cryptographic algorithms for quantum networks

The mathematical models can be used not only for quantum networks and authentication but also for full-scale quantum computing. Quantum hashing can help protect quantum algorithms against mistakes. Relevant research is currently in progress at Kazan Federal University. (2018-12-13)

Quantum computing closer as RMIT drives towards first quantum data bus

Researchers have trialled a quantum processor capable of routing quantum information from different locations in a critical breakthrough for quantum computing. (2016-04-18)

Quantum physics enables perfectly secure cloud computing

Researchers have succeeded in combining the power of quantum computing with the security of quantum cryptography and have shown that perfectly secure cloud computing can be achieved using the principles of quantum mechanics. They have performed an experimental demonstration of quantum computation in which the input, the data processing, and the output remain unknown to the quantum computer. (2012-01-19)

Approximate quantum cloning: The new way of eavesdropping in quantum cryptography

Cloning of quantum states is used for eavesdropping in the context of quantum cryptography or for quantum computation. Uncertainty at the quantum scale makes exact cloning of quantum states impossible. Yet, they may be copied in an approximate way using a method called probabilistic quantum cloning, or PQC. In a new study published in EPJ D, Pinshu Rui from Anhui Xinhua and Anhui Universities, Hefei, China, and colleagues demonstrate that partial PQC is possible. (2018-02-20)

Unpolarized single-photon generation with true randomness from diamond

The Tohoku University research group of Professor Keiichi Edamatsu and Postdoctoral fellow Naofumi Abe has demonstrated dynamically and statically unpolarized single-photon generation using diamond. (2017-05-08)

UCSB physicists demonstrate the quantum von Neumann architecture

A new paradigm in quantum information processing has been demonstrated by physicists at UC Santa Barbara. Their results are published in this week's issue of Science Express online. (2011-09-01)

US Naval Research Laboratory 'connects the dots' for quantum networks

Researchers at the US Naval Research Laboratory developed a novel technique that could enable new technologies that use properties of quantum physics for computing, communication and sensing, which may lead to 'neuromorphic' or brain-inspired computing. (2019-07-09)

Scientists demonstrate all-fiber quantum logic

A team of physicists and engineers have demonstrated all-fiber quantum logic, where single photons are generated and used to perform the controlled-NOT quantum logic gate in optical fibers with high fidelity. (2009-05-28)

New method to detect prize particle for future quantum computing

Research published today in the journal Nature Communications uncovers a new method to detect Majorana particles, a key element for a next-generation quantum computing platform. (2014-09-10)

The right squeeze for quantum computing

A new theoretical model involving squeezing light to just the right amount to accurately transmit information using subatomic particles is bringing us closer to a new era of computing. (2018-05-31)

Unlocking the gates to quantum computing

Researchers from Griffith University and the University of Queensland have overcome one of the key challenges to quantum computing by simplifying a complex quantum logic operation. They demonstrated this by experimentally realizing a challenging circuit -- the quantum Fredkin gate -- for the first time. (2016-03-25)

Paving the way for a faster quantum computer

A team of physicists from the University of Vienna and the Austrian Academy of Sciences have demonstrated a new quantum computation scheme in which operations occur without a well-defined order. The researchers led by Philip Walther and Caslav Brukner used this effect to accomplish a task more efficiently than a standard quantum computer. Moreover, these ideas could set the basis for a new form of quantum computing, potentially providing quantum computers with an even larger computational speed-up. (2015-08-11)

Spinning quantum dots

A new paper in EPJ B presents a theoretical analysis of electron spins in moving semiconductor quantum dots, showing how these can be controlled by electric fields in a way that suggests they may be usable as information storage and processing components of quantum computers. (2020-01-15)

Researchers reach milestone in quantum standardization

Researchers at the University of Waterloo have developed a method that could pave the way to establishing universal standards for measuring the performance of quantum computers. The new method, called cycle benchmarking, allows researchers to assess the potential of scalability and to compare one quantum platform against another. (2019-11-25)

New algorithm optimizes quantum computing problem-solving

Tohoku University researchers have developed an algorithm that enhances the ability of a Canadian-designed quantum computer to more efficiently find the best solution for complicated problems, according to a study published in the journal Scientific Reports. (2019-04-10)

Pitt engineering researchers strive to simulate turbulent combustion in aerospace applications

A research team at the University of Pittsburgh is developing quantum-computing algorithms to better model turbulent combustion in aerospace applications. A five-year US Air Force grant was awarded this month to principal investigator Peyman Givi, the James T. MacLeod Professor in the Swanson School of Engineering, who is working with faculty members from Pitt's Kenneth P. Dietrich School of Arts and Sciences and Center for Simulation and Modeling. (2012-04-18)

Faster method to read quantum memory

Scientists at Aalto University and VTT have developed a faster way to read information out of qubits, the basic building blocks of a quantum computer. (2019-02-25)

CCNY & partners in quantum algorithm breakthrough

Researchers led by City College of New York physicist Pouyan Ghaemi report the development of a quantum algorithm with the potential to study a class of many-electron quantums system using quantum computers. Their paper, entitled ''Creating and Manipulating a Laughlin-Type ν=1/3 Fractional Quantum Hall State on a Quantum Computer with Linear Depth Circuits,'' appears in the December issue of

Mapping the future direction for quantum research

The way research in quantum technology will be taken forward has been laid out in a revised roadmap for the field. Published today in the New Journal of Physics, leading European quantum researchers summarise the field's current status, and examine its challenges and goals. (2018-08-15)

Scientists create new device to light up the way for quantum technologies

Researchers at CRANN and the School of Physics at Trinity College Dublin, Ireland, have created an innovative new device that will emit single particles of light, or photons, from quantum dots that are the key to practical quantum computers, quantum communications, and other quantum devices. (2020-07-07)

Faster than allowed by quantum computing?

Quantum computers are more powerful than classical computers since they work with coherent ''quantum bits'' instead of ordinary zeroes and ones. But could there be even more efficient ''science fiction computers''? Researchers from the Austrian Academy of Sciences and the University of Vienna have now shown that this is not possible. (2019-02-01)

World record: Julich supercomputer simulates quantum computer

A quantum computer could provide an enormous improvement in the processing speed of existing computers. However, as yet they only exist in the laboratory in the form of small prototypes with a capacity of a few bits. They can now be explored in more detail, at least in simulations. The Julich supercomputer JUGENE can now simulate the largest quantum computer system in the world with 42 bits. (2010-03-30)

Quantum researchers able to split one photon into three

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo report the first occurrence of directly splitting one photon into three. The occurrence, the first of its kind, used the spontaneous parametric down-conversion method (SPDC) in quantum optics and created what quantum optics researchers call a non-Gaussian state of light. A non-Gaussian state of light is considered a critical ingredient to gain a quantum advantage. (2020-02-27)

Making light work of quantum computing

Light may be the missing ingredient in making usable quantum silicon computer chips, according to an international study featuring a University of Queensland researcher. The team has engineered a silicon chip that can guide single particles of light - photons -- along optical tracks, encoding and processing quantum-bits of information known as 'qubits'. (2018-08-20)

Speeding-up quantum computing using giant atomic ions

An international team of researchers have found a new way to speed up quantum computing that could pave the way for huge leaps forward in computer processing power. (2020-04-15)

Data structures influence speed of quantum search in unexpected ways

Quantum computers will be able to find target items within large piles of data far faster than conventional computers though the speed of the search will likely depend on the structure of the data. Intuition says that the search would be fastest in a highly connected database, but a new analysis found counterexamples of slowed search on a highly connected structure and fast search on a sparsely connected one. (2015-03-17)

UCSB physicists move 1 step closer to quantum computing

Physicists at UC Santa Barbara have made an important advance in electrically controlling quantum states of electrons, a step that could help in the development of quantum computing. The work is published online today on the Science Express Web site. (2009-11-19)

Analogue quantum computation has been universally digitized using superconducting circuits

The QUTIS research group (www.qutisgroup.com) of the University of the Basque Country (UPV/EHU) and Google's quantum computation team have collaborated on a pioneering experiment that universally digitizes analogue quantum computation on a superconducting chip. This breakthrough was made at Google's labs in Santa Barbara (California) and has been published in the prestigious journal Nature. (2016-06-09)

Paving the way to Canada's next big industry -- the quantum information frontier

Canada's quantum leaders, including Raymond Laflamme, will be participating at this week's annual meeting of the American Association for the Advancement of Science, starting with the Canada Foundation for Innovation, Dialogues at UBC Robson Square, this Wednesday, Feb. 15, at 6 p.m. (2012-02-15)

Refrigerator for quantum computers discovered

Researchers at Aalto University have invented a quantum-circuit refrigerator, which can reduce errors in quantum computing. This is a new twist towards a functioning quantum computer. (2017-05-08)

New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer. (2016-10-18)

Scientists pump up chances for quantum computing

University of Adelaide-led research has moved the world one step closer to reliable, high-performance quantum computing. (2018-07-03)

Debbie Leung, a fellow in CIFAR's Quantum Information Science program and a faculty member at the University of Waterloo's Institute for Quantum Computing, will discuss the challenges of scaling quantum computing at the AAAS meeting on Feb. 16. (2019-02-16)

Quantum algorithm breakthrough

An international research group led by scientists from the University of Bristol, UK, and the University of Queensland, Australia, has demonstrated a quantum algorithm that performs a true calculation for the first time. Quantum algorithms could one day enable the design of new materials, pharmaceuticals or clean energy devices. (2013-02-24)

RMIT researchers make leap in measuring quantum states

Researchers have developed self-guided quantum tomography which uses a search algorithm to iteratively 'find' the quantum state. This technique significantly reduces the necessary resources by removing the need for any data storage or post-processing. (2016-07-21)

Nobel prize winner Dr. Anthony Leggett merges quantum computing theory and application in new book

Kluwer Academic Publishers today announced the anticipated release of 2003 Nobel Prize winner Dr. Anthony Leggett's book Quantum Computing and Quantum Bits in Mesoscopic Systems. Co-edited with Dr. Berardo Ruggiero of the Instituto di Cibernetica del CNR in Italy and Dr. Paolo Silverstini of the Seconda Universita degli Studi di Napoli in Aversa, Italy, the book is heralded as a comprehensive work on theoretical quantum physics and a significant leap forward in its practical implementation. (2004-01-14)

Simultaneous detection of multiple spin states in a single quantum dot

Osaka University-led researchers achieved single-shot readout of three two-electron spin states of a single quantum dot. This is the first example of simultaneous detection of multiple spin states in a single quantum dot. The team measured the change in current of a quantum point contact charge sensor near a quantum dot, which depended on both spin state and spin-orbital interactions. Their findings represent a step forward on the path to realizing quantum computing. (2017-03-13)

Quantum computing is coming -- are you prepared for it?

Quantum computing will change lives, society and the economy and a working system is expected to be developed by 2020 according to a leading figure in the world of quantum computing, who will talk tomorrow at the World Economic Forum in Davos, Switzerland. (2016-01-20)

Spotlight on quantum computing at SXSW 2018

South by Southwest 2018 hosts a panel on March 10th called Quantum Computing: Science Fiction to Science Fact. Experts on quantum computing make up the panel, including Antia Lamas-Linares of the Texas Advanced Computing Center at UT Austin. Lamas-Linares co-authored a study in the Proceedings of the SPIE (February, 2018). The study, 'Secure Quantum Clock Synchronization,' proposed a protocol to verify and secure time synchronization of distant atomic clocks, such as those used for GPS signals in cell phone towers. (2018-03-09)

Prototype of most advanced quantum memory presented by two Kazan universities

In this paper we experimentally demonstrated a broadband scheme of the multiresonator quantum memory-interface. The microwave photonic scheme consists of the system of mini-resonators strongly interacting with a common broadband resonator coupled with the external waveguide. We have implemented the impedance matched quantum storage in this scheme via controllable tuning of the mini-resonator frequencies and coupling of the common resonator with the external waveguide. (2018-04-11)

Slicing optical beams: Cryptographic algorithms for quantum networks

The mathematical models can be used not only for quantum networks and authentication but also for full-scale quantum computing. Quantum hashing can help protect quantum algorithms against mistakes. Relevant research is currently in progress at Kazan Federal University. (2018-12-13)

Quantum computing closer as RMIT drives towards first quantum data bus

Researchers have trialled a quantum processor capable of routing quantum information from different locations in a critical breakthrough for quantum computing. (2016-04-18)

Quantum physics enables perfectly secure cloud computing

Researchers have succeeded in combining the power of quantum computing with the security of quantum cryptography and have shown that perfectly secure cloud computing can be achieved using the principles of quantum mechanics. They have performed an experimental demonstration of quantum computation in which the input, the data processing, and the output remain unknown to the quantum computer. (2012-01-19)

Approximate quantum cloning: The new way of eavesdropping in quantum cryptography

Cloning of quantum states is used for eavesdropping in the context of quantum cryptography or for quantum computation. Uncertainty at the quantum scale makes exact cloning of quantum states impossible. Yet, they may be copied in an approximate way using a method called probabilistic quantum cloning, or PQC. In a new study published in EPJ D, Pinshu Rui from Anhui Xinhua and Anhui Universities, Hefei, China, and colleagues demonstrate that partial PQC is possible. (2018-02-20)

Unpolarized single-photon generation with true randomness from diamond

The Tohoku University research group of Professor Keiichi Edamatsu and Postdoctoral fellow Naofumi Abe has demonstrated dynamically and statically unpolarized single-photon generation using diamond. (2017-05-08)

UCSB physicists demonstrate the quantum von Neumann architecture

A new paradigm in quantum information processing has been demonstrated by physicists at UC Santa Barbara. Their results are published in this week's issue of Science Express online. (2011-09-01)

US Naval Research Laboratory 'connects the dots' for quantum networks

Researchers at the US Naval Research Laboratory developed a novel technique that could enable new technologies that use properties of quantum physics for computing, communication and sensing, which may lead to 'neuromorphic' or brain-inspired computing. (2019-07-09)

Scientists demonstrate all-fiber quantum logic

A team of physicists and engineers have demonstrated all-fiber quantum logic, where single photons are generated and used to perform the controlled-NOT quantum logic gate in optical fibers with high fidelity. (2009-05-28)

New method to detect prize particle for future quantum computing

Research published today in the journal Nature Communications uncovers a new method to detect Majorana particles, a key element for a next-generation quantum computing platform. (2014-09-10)

The right squeeze for quantum computing

A new theoretical model involving squeezing light to just the right amount to accurately transmit information using subatomic particles is bringing us closer to a new era of computing. (2018-05-31)

Unlocking the gates to quantum computing

Researchers from Griffith University and the University of Queensland have overcome one of the key challenges to quantum computing by simplifying a complex quantum logic operation. They demonstrated this by experimentally realizing a challenging circuit -- the quantum Fredkin gate -- for the first time. (2016-03-25)

Paving the way for a faster quantum computer

A team of physicists from the University of Vienna and the Austrian Academy of Sciences have demonstrated a new quantum computation scheme in which operations occur without a well-defined order. The researchers led by Philip Walther and Caslav Brukner used this effect to accomplish a task more efficiently than a standard quantum computer. Moreover, these ideas could set the basis for a new form of quantum computing, potentially providing quantum computers with an even larger computational speed-up. (2015-08-11)

Spinning quantum dots

A new paper in EPJ B presents a theoretical analysis of electron spins in moving semiconductor quantum dots, showing how these can be controlled by electric fields in a way that suggests they may be usable as information storage and processing components of quantum computers. (2020-01-15)

Researchers reach milestone in quantum standardization

Researchers at the University of Waterloo have developed a method that could pave the way to establishing universal standards for measuring the performance of quantum computers. The new method, called cycle benchmarking, allows researchers to assess the potential of scalability and to compare one quantum platform against another. (2019-11-25)

New algorithm optimizes quantum computing problem-solving

Tohoku University researchers have developed an algorithm that enhances the ability of a Canadian-designed quantum computer to more efficiently find the best solution for complicated problems, according to a study published in the journal Scientific Reports. (2019-04-10)

Pitt engineering researchers strive to simulate turbulent combustion in aerospace applications

A research team at the University of Pittsburgh is developing quantum-computing algorithms to better model turbulent combustion in aerospace applications. A five-year US Air Force grant was awarded this month to principal investigator Peyman Givi, the James T. MacLeod Professor in the Swanson School of Engineering, who is working with faculty members from Pitt's Kenneth P. Dietrich School of Arts and Sciences and Center for Simulation and Modeling. (2012-04-18)

Faster method to read quantum memory

Scientists at Aalto University and VTT have developed a faster way to read information out of qubits, the basic building blocks of a quantum computer. (2019-02-25)

CCNY & partners in quantum algorithm breakthrough

Researchers led by City College of New York physicist Pouyan Ghaemi report the development of a quantum algorithm with the potential to study a class of many-electron quantums system using quantum computers. Their paper, entitled ''Creating and Manipulating a Laughlin-Type ν=1/3 Fractional Quantum Hall State on a Quantum Computer with Linear Depth Circuits,'' appears in the December issue of

*PRX Quantum*, a journal of the American Physical Society. (2020-11-13)Mapping the future direction for quantum research

The way research in quantum technology will be taken forward has been laid out in a revised roadmap for the field. Published today in the New Journal of Physics, leading European quantum researchers summarise the field's current status, and examine its challenges and goals. (2018-08-15)

Scientists create new device to light up the way for quantum technologies

Researchers at CRANN and the School of Physics at Trinity College Dublin, Ireland, have created an innovative new device that will emit single particles of light, or photons, from quantum dots that are the key to practical quantum computers, quantum communications, and other quantum devices. (2020-07-07)

Faster than allowed by quantum computing?

Quantum computers are more powerful than classical computers since they work with coherent ''quantum bits'' instead of ordinary zeroes and ones. But could there be even more efficient ''science fiction computers''? Researchers from the Austrian Academy of Sciences and the University of Vienna have now shown that this is not possible. (2019-02-01)

World record: Julich supercomputer simulates quantum computer

A quantum computer could provide an enormous improvement in the processing speed of existing computers. However, as yet they only exist in the laboratory in the form of small prototypes with a capacity of a few bits. They can now be explored in more detail, at least in simulations. The Julich supercomputer JUGENE can now simulate the largest quantum computer system in the world with 42 bits. (2010-03-30)

Quantum researchers able to split one photon into three

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo report the first occurrence of directly splitting one photon into three. The occurrence, the first of its kind, used the spontaneous parametric down-conversion method (SPDC) in quantum optics and created what quantum optics researchers call a non-Gaussian state of light. A non-Gaussian state of light is considered a critical ingredient to gain a quantum advantage. (2020-02-27)

Making light work of quantum computing

Light may be the missing ingredient in making usable quantum silicon computer chips, according to an international study featuring a University of Queensland researcher. The team has engineered a silicon chip that can guide single particles of light - photons -- along optical tracks, encoding and processing quantum-bits of information known as 'qubits'. (2018-08-20)

Speeding-up quantum computing using giant atomic ions

An international team of researchers have found a new way to speed up quantum computing that could pave the way for huge leaps forward in computer processing power. (2020-04-15)

Data structures influence speed of quantum search in unexpected ways

Quantum computers will be able to find target items within large piles of data far faster than conventional computers though the speed of the search will likely depend on the structure of the data. Intuition says that the search would be fastest in a highly connected database, but a new analysis found counterexamples of slowed search on a highly connected structure and fast search on a sparsely connected one. (2015-03-17)

UCSB physicists move 1 step closer to quantum computing

Physicists at UC Santa Barbara have made an important advance in electrically controlling quantum states of electrons, a step that could help in the development of quantum computing. The work is published online today on the Science Express Web site. (2009-11-19)

Analogue quantum computation has been universally digitized using superconducting circuits

The QUTIS research group (www.qutisgroup.com) of the University of the Basque Country (UPV/EHU) and Google's quantum computation team have collaborated on a pioneering experiment that universally digitizes analogue quantum computation on a superconducting chip. This breakthrough was made at Google's labs in Santa Barbara (California) and has been published in the prestigious journal Nature. (2016-06-09)

Paving the way to Canada's next big industry -- the quantum information frontier

Canada's quantum leaders, including Raymond Laflamme, will be participating at this week's annual meeting of the American Association for the Advancement of Science, starting with the Canada Foundation for Innovation, Dialogues at UBC Robson Square, this Wednesday, Feb. 15, at 6 p.m. (2012-02-15)

Refrigerator for quantum computers discovered

Researchers at Aalto University have invented a quantum-circuit refrigerator, which can reduce errors in quantum computing. This is a new twist towards a functioning quantum computer. (2017-05-08)

New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer. (2016-10-18)

Scientists pump up chances for quantum computing

University of Adelaide-led research has moved the world one step closer to reliable, high-performance quantum computing. (2018-07-03)

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