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.
The Maximilians Medal for Sciences and Arts is the highest distinction in Bavaria for outstanding contributions in these two disciplines. Immanuel Bloch receives the medal for his pioneering works in quantum physics with which he has […]
Patrick Emonts (MPQ)Monte Carlo sampling is commonly used in machine learning, for example to sample restricted Boltzmann machines.
npj Quantum Information, Published online: 11 November 2021; doi:10.1038/s41534-021-00498-9 Machine learning of high dimensional data on a noisy quantum processor
How monitoring quantum Otto engine affects its performance. Minimizing the measurement effects preserves coherence across engine cycles and improves the power output and reliability. Read More Quantum Computers News — ScienceDaily
npj Quantum Information, Published online: 08 November 2021; doi:10.1038/s41534-021-00495-y Beyond the standard quantum limit for parametric amplification of broadband signals
Researchers have discovered a novel way to manipulate defects in semiconductors. The study holds promising opportunities for novel forms of precision sensing, or the transfer of quantum information between physically separate qubits, as well as […]
The UK Quantum Technology Hub Sensors and Timing are pleased to announce the third Call for Proposals for the Quantum Technology Partnership Resource Fund (PRF).
Georgios Styliaris (MPQ):The Su-Schrieffer-Heeger (SSH) Hamiltonian is perhaps the most basic model encompassing the key concepts of a topological insulator.
Qubits are the main building blocks of quantum devices: improving their performance at every stage of development is thus crucial. A qubit’s properties such as its coherence time are directly affected by their architecture and […]
Computer scientists have developed an extremely secure identity verification method based on the fundamental principle that information cannot travel faster than the speed of light. The breakthrough has the potential to greatly improve the security […]
Adrián Franco Rubio (MPQ):As one progresses in the study of theoretical physics, the concept of chirality shows up in a variety of different places, with the adjective “chiral” being attached to different entities in different […]
A graph with its 3-colouring. For each edge, we check that the two connected vertices are of different colours. © All rights reserved The volume of data transferred is constantly increasing, but the absolute security of […]
npj Quantum Information, Published online: 04 November 2021; doi:10.1038/s41534-021-00496-x Practical distributed quantum information processing with LOCCNet
Pavel Kos (MPQ):We study thermalisation and spectral properties of extended systems connected, through theirboundaries, to a thermalising Markovian bath.
Color centers are lattice defects in crystals that can capture one or more additional electrons. The spin of these electrons is very sensitive to external electric and magnetic fields — and to sound. Researchers are […]
The opening of the new home of the AWS Center for Quantum Computing, a state-of-the-art facility in Pasadena, California.
A transportable, standalone quantum navigation system designed for large vehicles such as ships and trains will be among the many exhibits hosted by researchers at the UK Quantum Technology Hub Sensors and Timing at the […]
Quantum physicists are reporting an international achievement for Denmark in the field of quantum technology. By simultaneously operating multiple spin qubits on the same quantum chip, they surmounted a key obstacle on the road to […]
Researchers take advantage of quantum entanglement to generate an incredibly large bandwidth using a thin-film nanophotonic device that could lead to advances in metrology, sensing and quantum networks for information processing and communications. Read More […]
Alba Cervera Lierta and Mario Krenn:Logic artificial intelligence (AI) is a subfield of AI where variables can take two defined arguments, True or False, and are arranged in clauses that follow the rules of formal […]
npj Quantum Information, Published online: 29 October 2021; doi:10.1038/s41534-021-00491-2 Effects of surface treatments on flux tunable transmon qubits
A novel framework based on semidefinite programming provides universal security bounds for device-independent quantum key distribution by directly calculating von Neumann entropy using complete measurement statistics, enabling analysis of complex protocols beyond traditional CHSH inequality violations and extending to other device-independent cryptographic tasks.
Anna Dawid-Łękowska (ICFO and University of Warsaw):Identifying phase transitions is one of the key problems in quantummany-body physics.
npj Quantum Information, Published online: 28 October 2021; doi:10.1038/s41534-021-00478-z Analyzing the performance of variational quantum factoring on a superconducting quantum processor