Articles tagged with Quantum Information Science
Researchers demonstrate a compact QKD system that paves the way for cost-effective satellite-based quantum networks. The system successfully distributes secure keys between a space lab and four ground stations, representing an important step toward practical QKD networks.
Purdue researchers have created a 2D array of electron and nuclear spin qubits, enabling atomic-scale nuclear magnetic resonance spectroscopy and reading/writing quantum information with nuclear spins in 2D materials. This method harnesses three nitrogen nuclei at a time for longer coherence times than electron qubits.
Researchers from the University of Pennsylvania establish a relationship between topology and entanglement, tying two major principles in physics together. The connection reveals that the genus of the Fermi surface is closely related to a measure of quantum entanglement called mutual information.
Researchers have created and observed novel vortices in an ultracold gas, exhibiting unexpected properties due to hidden discrete symmetries. The discovery may lead to breakthroughs in quantum computing and information processing.
Researchers optimized the ZZ SWAP network protocol, introducing a new technique to improve quantum error mitigation. This enables more efficient execution of quantum algorithms like QAOA, which can solve combinatorial optimization problems.
Researchers at LMU and NUS have successfully implemented device-independent quantum key distribution (QKD), a new method for secure communication. This breakthrough enables the creation of secret keys with uncharacterized devices, improving the security of quantum networks.
Researchers at Indiana University and the University of Tennessee have developed a one-dimensional helium model system, which enables the creation of smaller and faster microchips. The new system is designed to explore the behavior of particles in a confined space, allowing for the study of previously unexplored physics.
The guide introduces quantum algorithms and their implementation on existing hardware, providing a thorough introduction for would-be programmers. It surveys 20 quantum algorithms and guides readers through implementing them on IBM's 5-qubit quantum computer, covering the basics of quantum programming and in-depth algorithm explanations.
The University of Illinois Chicago has joined the Co-design Center for Quantum Advantage, a US Department of Energy-funded center focused on building scalable quantum computer systems. The partnership will open new opportunities for UIC students in quantum engineering and collaboration with researchers.
The Berkeley Lab team has demonstrated a three-qubit native quantum gate, the iToffoli gate, with high fidelity of 98.26%. This breakthrough enables universal quantum computing and reduces circuit running times.
Researchers at Princeton University have discovered that electrons in a crystal exhibit linked and knotted quantum twists, raising questions about the quantum properties of electronic systems. The study brings together ideas in condensed matter physics, topology, and knot theory to create a new understanding of quantum mechanics.
A team of scientists used a quantum simulator to study the behavior of a complex quantum system, finding that it exhibits characteristics similar to fluid dynamics. The research also showed that this phenomenon can be observed in the flights of bees, as well as in unusual stock market movements.
Researchers have demonstrated that ultra-thin topological insulator nanowires can act as a quantum one-way street for electrons, offering a significant step towards achieving topological qubits. This breakthrough enables highly stable qubits, the building blocks of future quantum computers.
A team of scientists at Argonne National Laboratory has developed a new qubit platform formed by freezing neon gas into a solid and trapping an electron there. The platform shows great promise in achieving ideal building blocks for future quantum computers, with promising coherence times competitive with state-of-the-art qubits.
The study investigates the role of physical principles in quantum Darwinism, finding that it relies on non-classical features, specifically entanglement, to emerge via natural selection. The researchers employed generalized probabilistic theories to analyze and compare different physical theories.
Researchers Francesca Ferlaino, Kathrin Thedieck and Hans Briegel will investigate new systems for quantum matter simulation, control of mTOR-dependent metabolic processes, and AI-driven quantum experiments. Their work has the potential to revolutionize fields such as physics, computer science and medicine.
A team of scientists has successfully implemented a novel QSDC system that transmits information directly using quantum states over 100 km of fiber, achieving ultra-low error rates and high transmission rates. The system uses photonic time-bin and phase states, resulting in a record-breaking distance of 100 km.
Researchers have discovered an elegant equation to approximate the coherence time of materials hosting spin qubits. The team can now estimate coherence times in seconds using just five material properties, facilitating a rapid exploration of new candidate materials.
Assistant Professor Henry Yuen at Columbia University will receive a $675,000 grant to develop verification protocols for entanglement theory and explore broader mathematical applications. His work aims to solve fundamental problems in computer science, mathematics, and physics using quantum entanglement.
Researchers at the University of Innsbruck have proposed a method to solve optimization problems using neutral atoms and four-qubit operations. The algorithm can be realized on existing quantum hardware by optimizing laser pulse durations in a feedback loop.
Physicists at the University of Innsbruck have developed a programmable quantum sensor that can measure with even greater precision, using tailored entanglement to optimize performance. The sensor autonomously finds its optimal settings through free parameters, promising a significant advantage over classical computers.
Scientists have achieved efficient quantum coupling between two distant magnetic devices, which can host magnons and exchange energy and information. This achievement may be useful for creating new quantum information technology devices.
Scientists develop a new framework for creating versatile quantum devices by fine-tuning molecular qubits. This breakthrough enables tailored quantum systems with improved control over spin and photon properties.
A collaboration between Berkeley Lab researchers developed a novel approach to mitigate noise in quantum computers, enabling reliable results from IBM quantum computers. The new method combines three other techniques to correct errors, allowing for bigger simulations and tackling complex problems.
Rice University physicists have developed a technique to engineer Rydberg states of ultracold strontium atoms, creating 'synthetic dimensions' that simulate real materials. This breakthrough enables the creation of interacting particles in a controlled environment, paving the way for new physics and material properties.
Researchers from the University of Warsaw have developed a quantum processor that can efficiently provide information on matter hidden in light, improving spectroscopy measurements. The device achieves high resolution (15 kHz) using a small amount of light, surpassing classical limits.
Researchers have achieved a record breakthrough by preserving quantum states for over 5 seconds, utilizing silicon carbide, a widely available material. This advancement enables the development of scalable and cost-effective quantum innovation, including potential applications in quantum communication networks and quantum computers.
Researchers have developed conducting systems that control electron spin and transmit a spin current over long distances without ultra-cold temperatures. This breakthrough enables the creation of new technologies for encoding and transmitting information at room temperature.
Scientists at Georgia Tech Research Institute have demonstrated a new approach for transporting trapped ion pairs through a single laser beam to create entangled qubits. This method reduces the need for multiple optical switches and complex controls, potentially simplifying quantum systems.
Researchers at the University of Bristol have reduced simulation time for an optical quantum computer from 600 million years to just a few months, achieving a one-billion-fold speedup. This breakthrough paves the way for future studies on quantum advantage and computational power.
Researchers from the Croatian Centre of Excellence for Advanced Materials and Sensors present five new or modified circuits intended for building a universal computer based on the Random Pulse Computing (RPC) paradigm. The development marks an advancement in the theory of impulse circuits.
Physicist Guido Pagano has won a prestigious CAREER award from the National Science Foundation (NSF) to study quantum entanglement and develop new error-correcting tools for quantum computation. He aims to understand how measurement affects entangled systems and create tools to correct errors caused by quantum decoherence.
Scientists at the University of Tokyo have created a novel machine learning algorithm that allows for efficient and accurate verification of time-dependent quantum devices. The algorithm, inspired by quantum reservoir computing, leverages memory effects in these systems to improve verification efficiency.
Researchers demonstrate that quantum networks' predictions differ when postulates are phrased in real numbers. The study proposes an experimental setup involving two sources and three measurement nodes, where complex quantum theory's predictions cannot be expressed by their real counterparts.
Researchers at Yokohama National University have developed an interface approach to control diamond nitrogen-vacancy centers, allowing direct translation to quantum devices. This enables remote quantum entanglement and secure information exchange over long distances.
A team of researchers has developed a simple and efficient method of quantum encryption using single photons, which can detect any attempt to hack the message. The breakthrough brings us closer to securing our data against quantum computers' potential attacks.
Scientists have designed a compact photonic circuit that uses sound waves to control light, outperforming previous alternatives and optimizing compatibility with atom-based sensors. The new device is simple in design, uses common optical materials, and can be adapted for different wavelengths of light.
Researchers at the University of Iowa study photon properties to predict secure quantum communication limits. They describe new quantum codes that rely on indistinguishable photons, enabling fast and secure data transmission in a potential 'quantum internet'.
Scientists discovered structural and surface chemistry defects in superconducting niobium qubits that may cause loss. The study pinpointed these defects using state-of-the-art characterization capabilities at the Center for Functional Nanomaterials and National Synchrotron Light Source II.
A team of researchers at Bristol's Quantum Engineering and Technology Labs has developed a silicon photonic chip that can protect quantum bits from errors using photons. This breakthrough could lead to the creation of more powerful quantum computers by reducing the fragility of qubits.
Researchers found a way to potentially enhance material properties for next-generation electronics by confining electron and ion transport in a patterned thin film. Confinement caused electrons to interfere with each other, increasing the oxide's conductivity.
A team of researchers at Purdue University developed ultrathin quantum sensors with 2D materials by applying a gold film to increase the brightness of spin qubits. This improved the contrast of their magnetic resonance signal and enhanced the sensitivity for detecting magnetic fields, local temperature, and pressure.
Researchers have found exotic topological features in soft matter, a discovery that challenges our understanding of physics. The study reveals that such features are widespread and can be observed in everyday environments, including living organisms.
Scientists detected electronic and optical interlayer resonances in bilayer graphene by twisting one layer 30 degrees, resulting in increased interlayer spacing that influences electron motion. This understanding could inform the design of future quantum technologies for more powerful computing and secure communication.
Quantum engineers at the University of New South Wales have discovered a new technique to control millions of spin qubits, a critical step towards building a practical quantum computer. This breakthrough uses a novel component called a dielectric resonator to focus microwave power and deliver uniform magnetic fields across the chip.
The DTU researchers have developed a universal measurement-based optical quantum computer platform, enabling the execution of any arbitrary algorithm. The platform is scalable to thousands of qubits and can be connected directly to a future quantum Internet.
A new $2.7 million grant from the US Department of Energy will support a three-year research effort to identify and store quantum information in solids, enabling significant advancements in quantum computing. The project aims to build a database of viable qbits by analyzing defects in solids.
The team achieved the first experimental demonstration of quantum information masking, a new protocol for transferring quantum information between multiple carriers. The fidelity of the entangled state was 97.7%, enabling secure transmission of simple images for three-party quantum secret sharing.
Researchers at Argonne National Laboratory and international partners have developed guidelines for discovering new defect-based quantum systems, which could lead to breakthroughs in quantum communications, sensing, and computing. The guidelines provide a framework for designing qubits tailored to specific applications.
Researchers emphasize the need for material advances in quantum computing hardware to create complex qubits. The study explores various materials and proposes strategies for tackling technological challenges. Sophisticated control of these materials is crucial for achieving quantum advantage.
Scientists discovered elusive type of spin dynamics in a quantum mechanical system, confirming a previously unproven hypothesis. The findings show that the Kardar-Parisi-Zhang scenario accurately describes changes in time of spin chains in certain quantum materials.
Scientists at the University of Innsbruck have created a method to individually address quantum emitters using chirped light pulses, enabling precise control over individual superconducting quantum bits and atoms in various electromagnetic structures. This approach has far-reaching implications for quantum computing and simulation.
Researchers used quantum annealing to simulate magnetic materials, matching theoretical predictions and resembling experimental data. The study provides a foundation for future materials science research and demonstrates the potential of quantum computers in tackling complex problems.
Researchers have successfully boosted the signal power of their atomic 'tweezer clock', measuring its performance for the first time. The upgraded clock platform achieved record-breaking quantum coherence, with individual atoms vibrating in unison for over 30 seconds.
The Association for Computing Machinery has published the first issue of its new peer-reviewed journal, Transactions on Quantum Computing, focusing on the theory and practice of quantum computing. The journal aims to publish high-impact research papers and surveys on topics in quantum information science.
Researchers at Northwestern and UChicago develop a new method to create tailor-made qubits by chemically synthesizing molecules that encode quantum information into their magnetic states. This bottom-up approach could lead to extraordinary flexibility and control, paving the way for next-generation quantum technology.
Researchers have developed an on-surface synthesis method to create graphene nanoribbons with precise electronic properties, advancing quantum devices. The approach uses a titanium dioxide surface and achieves atomic-scale precision, decoupling the material from the substrate and enabling unique quantum properties.
A multidisciplinary research team led by Columbia University is developing a quantum simulator to tackle real-world challenges. The project, funded by a $1 million NSF Convergence Accelerator award, aims to create a device that can solve problems difficult for classical computers.
Archana Kamal, a UMass Lowell physics professor and expert on quantum information technologies, will co-present a free TEDx talk on the next quantum revolution. The event features prominent women experts in various fields, including science, technology, education, and business.
The White House, NSF, and DOE announced over $1 billion in awards for the establishment of 12 new AI and QIS research institutes. These institutes will spur cutting-edge innovation, support regional economic growth, and advance American leadership in emerging technologies.