Articles tagged with Quantum Computing
Researchers found that topological insulators behave asymmetrically at the sub-atomic level, which could lead to significant improvements in energy efficiency for quantum computers. The discovery was made using first-principles calculations and observations taken at the Advanced Light Source.
Researchers investigated defect formation in Coulomb crystals during phase transitions, using ion traps to compress and fold the crystal structure. The experiments confirmed the Kibble-Zurek mechanism's predictions, demonstrating its importance in understanding complex physical phenomena.
Physicists at the University of Innsbruck have developed a new method to verify entanglement between several objects, using device-independent witnesses. This approach allows for high-confidence statements about entanglement with minimal assumptions.
Physicists at Innsbruck University develop new method to measure single photons, achieving a detection probability of 12%. The technique uses quantum logic spectroscopy and entangled ions to gain practical knowledge about single particles.
A new method for designing quantum memory has been developed, enabling long-term storage of quantum states with low error rates. This breakthrough could revolutionize information processing and solve complex problems in fields like materials science and physics.
In large quantum systems, entanglement becomes ubiquitous above a threshold of about 200 particles, enabling super high-speed communications and quantum computing. The study provides parameters to harness this property.
Researchers from UW-Milwaukee and University of York investigate ultra-thin films of new materials, aiming to create a materials platform for quantum computers. The team found that the unique properties of topological insulators can be modified by intrinsic defects, opening up new possibilities for spintronics.
Researchers at the University of Illinois Chicago have developed a method to introduce exactly four copper ions into each quantum dot, enabling fine-tuning of optical properties and production of vibrant colors. The study opens up possibilities for producing spectacular dyes with consistent results.
An interdisciplinary team has successfully depleted electrons from the bulk of topological insulators, demonstrating superconducting surface states. This breakthrough enables experimentation with TIs and paves the way for investigating the Majorana quasiparticle, a fermion that could serve as a quantum bit in quantum computing.
Researchers at NIST and the University of Maryland have developed an optical memory device using a cloud of rubidium atoms, enabling the storage of simple images. The breakthrough demonstrates spatially addressable readout and erasure of an image in the vapor, paving the way for quantum computing applications.
Researchers have pioneered a method to chill molecules using an ultracold cloud of calcium atoms and molecular ions, enabling the creation of hundreds of different molecules. This breakthrough brings scientists closer to building a computer that doesn't work with zeros and ones but with quantum mechanical objects.
A team of physicists at UCSB has made a discovery that provides new understanding in the quantum realm. By manipulating light on superconducting chips, they have developed an unprecedented level of control over photons, enabling the shaping of released photons into different wave forms.
Researchers at the University of Innsbruck successfully reversed a quantum measurement using quantum error correction protocol, which contradicts foundational principles. This experiment demonstrates that information can be reconstructed from entangled states after individual particle measurements.
Engineers at the University of Utah have shown that it is feasible to create organic topological insulators, which can conduct electricity on their edges but act as an insulator inside. This discovery could enable faster-than-light information transfer in quantum computers and spintronics devices.
A research team at the University of Innsbruck has successfully transferred quantum information from an atom to a single photon, paving the way for the construction of a quantum internet. This breakthrough enables the transfer of quantum information over optical channels between quantum computers.
Physicists at the University of Texas at Austin have designed a simulation that emulates key properties of electronic topological insulators. The simulation, called SPINDOMs, allows researchers to control the spin of photons in a way that emulates what can be done with electrons.
Physicists have demonstrated a new type of quantum entanglement using three particles, building on Einstein's original ideas. This experiment may lead to the creation of hybrid quantum systems with multiple unique properties.
Scientists from Bangalore and Mainz have developed a new method for cooling ions using collisions with cold atoms. This process enables the storage of ions in ion traps at stable conditions for longer periods, which could lead to the formation of molecular ions in space.
A French team identified key parameters to generate high-fidelity single photons, crucial for quantum computing and communication. They simulated detector properties and experimental results to improve reliability.
Researchers at the University of Toronto have successfully induced high-temperature superconductivity in a semiconductor by placing it in proximity to a topological insulator using Scotch poster tape. This breakthrough could lead to advancements in quantum computing and improvements in energy efficiency.
Physicists at the University of Vienna successfully transmitted quantum states between two islands in the Canary Islands, overcoming previous distances of just 97 km. The experiment uses active feed-forward protocol to enable reliable quantum teleportation over long distances.
The device can be used to study stars, galaxies, and black holes, as well as explore the quantum world. It combines features of other amplifiers, operating over a wide frequency range with minimal noise.
Researchers develop tool to decompose photon pairs' superimposed states, enabling access to their information even with imperfect measurements. The findings suggest that higher entanglement levels can reveal more information, leading to more resilient quantum info applications.
A new experiment shows that light exhibits both electric and magnetic fields simultaneously, violating classical physics, and demonstrating its quantum mechanical nature. The study's findings have implications for understanding the behavior of other systems and developing quantum computers.
J. Elisenda Grigsby, a Boston College assistant professor, received a National Science Foundation (NSF) CAREER award to study the properties of 3- and 4-dimensional spaces relevant to fields like information technology and DNA research.
A Pitt engineering research team is developing quantum-computing algorithms to model turbulent combustion, a challenge in aerospace. The US Air Force has awarded a five-year grant for this project.
Quantum computing is transforming computing, communications and other technologies with its groundbreaking capabilities. Researchers at the Institute for Quantum Computing are harnessing the forces of quantum mechanics to build incredible new technologies that will revolutionize information processing, storage, sharing and understanding.
Researchers successfully created the narrowest conducting wires in silicon with a diameter of just one atom, exhibiting excellent electrical properties and beating out copper. This breakthrough could pave the way for atomic-scale components in future quantum computers.
Scientists have developed the thinnest silicon wires yet, four atoms wide and one atom tall, which can carry electrical currents just like copper wires. This breakthrough has significant implications for future nanoscale computational devices and quantum computing.
Researchers have developed a method using quantum computing to measure magnetic fields accurately, enabling the creation of nanoscale MRI instruments. This breakthrough could lead to non-invasive studies of molecules and living cells without destroying them.
Researchers develop scalable diamond-based devices with silver coating, enabling efficient photon emission and control. The technology supports the creation of robust quantum computers and sensitive magnetometers, opening new avenues for applications in quantum information processing and nanoscale measurements.
Scientists have discovered a common defect in diamonds that may be suitable for use in quantum computers. The nitrogen-vacancy (NV) center's energy level properties were studied using cryogenic temperatures.
Researchers from PTB and Hanover have created a novel laser cooling method using a single laser source to bring a magnesium ion to a standstill. This technique allows for more precise measurements of the fine-structure constant, potentially resolving contradictions in astronomical data comparisons.
Theoretical work at UBC and experiments at UC Santa Barbara led to a breakthrough in predicting and controlling environmental decoherence, a major hurdle for quantum computing. The findings suggest that high magnetic fields can suppress decoherence rates, making magnetic molecules a promising candidate for quantum computing hardware.
Researchers have developed a method to compute a tiny temperature-dependent error source in atomic clocks with unprecedented accuracy. This correction could represent a significant step towards creating an atomic clock with precision equivalent to one second of error every 32 billion years.
Researchers at Max Planck Institute of Quantum Optics successfully stored quantum information in a single atom, overcoming previous challenges in photon-atom interactions. The technique uses a rubidium atom to store the quantum state of photons, enabling potential applications in powerful quantum computers and networks.
Researchers have made significant progress in creating efficient single-photon sources using fluorescent 'defect centers' in diamond. These structures can be used to implement provably secure quantum cryptography schemes and potentially build solid-state quantum computers. The team's innovations include the development of nanofabricati...
Researchers at MIT propose an experiment using a large number of photons and beam splitters to calculate complex distributions. The challenge lies in simulating the sampling process, which is currently computationally intractable.
Physicists at JQI successfully demonstrated spin-orbit coupling in a gas of bosonic rubidium atoms, opening new possibilities for studying fundamental physics. The technique also showed promise for creating novel interactions between fermions, which could lead to breakthroughs in topological quantum computation and superconductivity.
Austrian physicists have realized a comprehensive toolbox for an open-system quantum simulator, which utilizes controlled dissipation to generate and intensify quantum effects. This innovation enables the study of highly complex quantum systems that were previously inaccessible.
Researchers at Caltech have demonstrated quantum entanglement for a four-part quantum state stored in four spatially distinct atomic memories. The team successfully created quadripartite entanglement by entangling the spin waves among four collections of Cesium atoms, which were then transferred to four beams of light.
Researchers at Bell Laboratories have created braided anyons that can withstand disturbances and store quantum information, potentially dispending with error prevention methods. The findings suggest that two-dimensional braids could lead to more robust quantum computing schemes.
Researchers at NIST demonstrated the conversion of near-infrared single photons to a near-visible wavelength, aiding hybrid quantum systems. This enables devices to generate and store photons with conflicting requirements, enhancing quantum communication, computation, and metrology.
Physicists at University of Innsbruck successfully expose four entangled ions to a noisy environment, demonstrating the variety of flavors or properties in their entanglement. This study forms an important basis for understanding entanglement under environmental disturbances and the boundary between quantum and classical worlds.
Physicists at NIST developed a new sensor to detect forces at the scale of yoctonewtons using trapped ions. The sensor achieved a measurement speed of 390 yoctonewtons in one second, outperforming previous records by an order of magnitude.
Researchers at Ohio University and the University of Hamburg captured the first images of atomic spin in a study published in Nature Nanotechnology. The discovery enables manipulation of spin direction to store data in nanoscale devices, potentially leading to faster, smaller, and more efficient computers.
The NIST team has developed a single photon detector that can count individual photons with 99 percent efficiency. This breakthrough technology improves the accuracy of electronic communication and quantum computing, while also enabling the detection of missing photons in long-distance data transmission to prevent information theft.
Researchers at UC Santa Barbara have demonstrated electrically manipulating quantum states of electrons in diamond crystals, a step towards developing quantum computers. The achievement enables the creation of magnetic fields large enough to change an atomic-scale defect's quantum state in under one billionth of a second.
Dr. Julia Kempe is working on future programs to keep data safe from quantum hackers, who could crack encryption codes quickly with the power of quantum computers. She estimates that within the next decade, these new computers could be used for malevolent power if not properly protected.
Scientists develop a novel nanoparticle structure that combines the functions of quantum dots and gold nanoparticles, creating a multipurpose tool for medical imaging and therapy. The breakthrough could enable more efficient delivery of drugs, heat therapy, and optical imaging.
Four Penn State researchers, Sean Hallgren, Adam Smith, Michael Hickner, and Susan Parks, will receive the Presidential Early Career Awards for Scientists and Engineers. They were recognized for their outstanding work in quantum computation, cryptography, polymer chemistry, and bioacoustics.
The NIST-developed stylus trap is a highly sensitive device that can sense small forces and transfer individual light particles with high efficiency. This technology has potential applications in quantum key cryptography, quantum computing, and surface characterization.
Researchers at the University of Michigan have discovered a method to prolong quantum bit memory by utilizing lasers. By exciting the quantum dot with a laser, scientists were able to block magnetic field interactions and stabilize the magnetic field, resulting in a significant increase in stable existence of the quantum bit.
Researchers at JILA have successfully controlled collisions between fermions, allowing for a significant boost in atomic clock accuracy. By understanding the dynamic effect of measurement processes, they reduced uncertainties in clock operation, making it 50% more accurate than previous results.
Researchers at NIST and Maryland have demonstrated a 'quantum buffer' technique to control data flow inside a quantum computer, potentially speeding up decryption and database search tasks. The technique involves delaying entangled images by up to 27 nanoseconds, which can be useful for quantum information-processing systems.
A team of University of Toronto researchers has discovered that heating gold at extremely high rates can make it harder, rather than softer. The study used a technique called 'femtosecond electron diffraction' to observe the effects of rapid heating on the material's atomic structure.
A four-minute animated movie created by University of Calgary's Barry Sanders explains the nature of quantum computing, its power and underlying science. The animation uses state-of-the-art techniques to convey quantum concepts in an accurate and exciting way.
Researchers at Eindhoven University of Technology cracked the McEliece encryption system, a candidate for post-quantum cryptography. This breakthrough could compromise current encryption methods like RSA, which banks use for secure transactions.
Researchers at NIST and JILA have created a tunable 'noiseless' amplifier that can significantly reduce uncertainty in delicate measurements of microwave signals. This amplifier could enable faster, more precise measurements in quantum computers and communications systems.
Researchers at Princeton University will study 'intractability' with a $10 million NSF grant, aiming to understand the limits of computer power. The center will address problems in cryptography and quantum computing, potentially leading to breakthroughs in computer security.