Researchers successfully simulated Google’s 53-qubit Sycamore quantum circuit seven times faster than the original quantum computer using 1,432 GPUs and innovative tensor network algorithms, effectively refuting Google’s quantum advantage claim.
Scientists have discovered and experimentally confirmed the existence of “quadruplons,” genuine four-body quasi-particles consisting of two electrons and two holes tightly bound together in a monolayer semiconductor, which represent a fundamentally new type of matter excitation beyond previously known quasi-particles like excitons and bi-excitons.
UCL researchers have developed a groundbreaking technique using arsenic atoms in silicon that achieves a 97% success rate for single-atom placement (compared to phosphorus’s 70%), potentially solving quantum computing’s twin challenges of error rates and scalability through scanning tunneling microscopy hydrogen resist lithography.
A groundbreaking theory bridges quantum mechanics and general relativity by treating the spacetime metric as a quantum operator and introducing an entropy-based gravitational action that yields modified Einstein equations with an emergent cosmological constant, potentially explaining cosmic expansion and dark matter through a novel auxiliary “G-field.”
Harvard scientists have developed a groundbreaking photon router that creates an optical interface between light signals and superconducting microwave qubits, potentially solving a major quantum computing challenge by enabling different quantum systems to communicate efficiently without bulky wires, thus bringing distributed, fiber-optic-based quantum computers closer to reality.
Researchers have developed a method to make previously hardly accessible properties in quantum systems measurable. The new method for determining the quantum state in quantum simulators reduces the number of necessary measurements and makes work with quantum simulators much more efficient.
npj Quantum Information, Published online: 24 June 2021; doi:10.1038/s41534-021-00436-9 Adaptive quantum state tomography with neural networks
npj Quantum Information, Published online: 22 June 2021; doi:10.1038/s41534-021-00438-7 Quantum repeaters based on concatenated bosonic and discrete-variable quantum codes
npj Quantum Information, Published online: 22 June 2021; doi:10.1038/s41534-021-00424-z Optimal two-qubit circuits for universal fault-tolerant quantum computation
A commonly studied perovskite can superfluoresce at temperatures that are practical to achieve and at timescales long enough to make it potentially useful in quantum computing applications. Read More Quantum Computers News — ScienceDaily
Researchers demonstrate a new high-flux and compact cold-atom source with low power consumption that can be a key component of many quantum technologies. Read More Quantum Computers News — ScienceDaily
The award honours internationally renowned scientists from abroad and aims to foster the exchange between Germany and the country of the awardee. From 22 June 2021, Professor Philipp Walther will be a guest scientist at […]
Quantum computers have been one-of-a-kind devices that fill entire laboratories. Now, physicists have built a prototype of an ion trap quantum computer that can be used in industry. It fits into two 19-inch server racks […]
npj Quantum Information, Published online: 18 June 2021; doi:10.1038/s41534-021-00439-6 Highly tunable magneto-optical response from magnesium-vacancy color centers in diamond
npj Quantum Information, Published online: 18 June 2021; doi:10.1038/s41534-021-00440-z Classical variational simulation of the Quantum Approximate Optimization Algorithm
npj Quantum Information, Published online: 18 June 2021; doi:10.1038/s41534-021-00434-x Deep reinforcement learning for efficient measurement of quantum devices
To the human eye, most stationary objects appear to be just that — still, and completely at rest. Yet if we were handed a quantum lens, allowing us to see objects at the scale of […]
Researchers have developed a new technique that keeps quantum bits of light stable at room temperature instead of only working at -270 degrees. Their discovery saves power and money and is a breakthrough in quantum […]
npj Quantum Information, Published online: 17 June 2021; doi:10.1038/s41534-021-00441-y Publisher Correction: Quantum nonlocality without entanglement: explicit dependence on prior probabilities of nonorthogonal mirror-symmetric states
A study led by physics researchers has discovered that a unique superconducting metal is more resilient when used as a very thin layer. Read More Quantum Computers News — ScienceDaily
Quantum computers could outperform classical computers at many tasks, but only if the errors that are an inevitable part of computational tasks are isolated rather than widespread events. Now, researchers have found evidence that errors […]
Researchers report that nonlocality is a universal property of the world, regardless of how and at what speed quantum particles move. Read More Quantum Computers News — ScienceDaily
Researchers have discovered a new and more efficient computing method for pairing the reliability of a classical computer with the strength of a quantum system. Read More Quantum Computers News — ScienceDaily
Research has resulted in the discovery of a new rare topological superconductor, LaPt3P. This discovery may be of huge importance to the future operations of quantum computers.
Physicists at the Max Planck Institute for Quantum Optics (MPQ) and Ludwig-Maximilian University in Munich (LMU) have used ultrashort laser pulses to probe the dynamics of photoelectron emission in tungsten crystals.
npj Quantum Information, Published online: 15 June 2021; doi:10.1038/s41534-021-00435-w Probabilistic one-time programs using quantum entanglement
npj Quantum Information, Published online: 15 June 2021; doi:10.1038/s41534-021-00422-1 Belief propagation with quantum messages for quantum-enhanced classical communications
Physicists have long suspected that dielectric materials may significantly disrupt ion-trap quantum computers. Now, researcher have developed a new method to quantify this source of error for the first time. For the future operation of […]
Engineers have demonstrated how, when the TMDC materials they make are stacked in a particular geometry, the interaction that occurs between particles gives researchers more control over the devices’ properties. Specifically, the interaction between electrons […]
“Quantum Computers” are the supposed ‘computers of the future’. Capable of out-calculating even the fastest current systems, this bleeding… Continue reading on Quantum Computing »