New stable quantum batteries can reliably store energy into electromagnetic fields
Researchers have proposed that the micromasers can serve as excellent model for future quantum batteries. Read More Quantum Computers News — ScienceDaily
Entanglement transitivity problems
Scientists have discovered that in quantum systems, certain patterns of entanglement between parts of a system can reveal additional entanglement relationships not directly observed, proving this phenomenon exists for both small and large quantum systems and characterizing specific conditions under which it occurs.
Compact QKD system paves the way to cost-effective satellite-based quantum networks
Researchers report an experimental demonstration of a space-to-ground quantum key distribution (QKD) network using a compact QKD terminal aboard the Chinese Space Lab Tiangong-2 and four ground stations. The demonstration represents an important step toward […]
New quantum technology combines free electrons and photons
Researchers have successfully created electron-photon pairs in a controlled way in an electron microscope. Read More Quantum Computers News — ScienceDaily
2D array of electron and nuclear spin qubits opens new frontier in quantum science
By using photons and electron spin qubits to control nuclear spins in a two-dimensional material, researchers have opened a new frontier in quantum science and technology, enabling applications like atomic-scale nuclear magnetic resonance spectroscopy, and […]
Unexpected quantum effects in natural double-layer graphene
An international research team has detected novel quantum effects in high-precision studies of natural double-layer graphene. This research provides new insights into the interaction of the charge carriers and the different phases, and contributes to […]
Decoherence of nitrogen-vacancy spin ensembles in a nitrogen electron-nuclear spin bath in diamond
Quantum coherence in diamond-based NV centers, crucial for quantum computing applications, faces limitations from decoherence effects. This study examines how nitrogen impurities (P1 centers) impact NV-spin coherence using cluster correlation expansion and density functional theory. Results show T2 varies linearly with P1 concentrations (log scale, -1.06 slope), matching experimental data. The Jahn-Teller effect and hyperfine interactions significantly influence decoherence dynamics. These findings establish theoretical T2 limits across P1 densities, guiding material optimization for quantum devices.
A new connection between topology and quantum entanglement
Theoretical work reveals an unexpected link between two major principles in physics that may inform future experimentation and an understanding of how to harness quantum information. Read More Quantum Computers News — ScienceDaily
Ultracold atoms dressed by light simulate gauge theories
Researchers have used the coldest systems in the universe to realize in the laboratory gauge theories, key models of modern physics that describe the fundamental forces of Nature and the behavior of complex quantum materials. […]
New quantum whirlpools with tetrahedral symmetries discovered in a superfluid
An international collaboration of scientists has created and observed an entirely new class of vortices — the whirling masses of fluid or air. A new article details laboratory studies of these ‘exotic’ whirlpools in an […]
Optimizing SWAP networks for quantum computing
Researchers have demonstrated how a smart compiler specifically tailored for superconducting quantum hardware can optimize circuits and networks and execute less error-prone quantum algorithms such as Quantum Approximate Optimization Algorithm (QAOA) important for quantum computing. […]
Zurich Instruments introduces qubit amplifier controller
Zurich Instruments offers Quantum Computing researchers a fast track to unleashing the power of parametric amplification for qubit readout. While being critical to achieve the high measurement speed and low error rates needed for quantum […]
Smart lighting system based on quantum dots more accurately reproduces daylight
Researchers have designed smart, color-controllable white light devices from quantum dots — tiny semiconductors just a few billionths of a meter in size — which are more efficient and have better color saturation than standard LEDs, and can dynamically reproduce daylight conditions in a single light.
A roadmap for the future of quantum simulation
A roadmap for the future direction of quantum simulation. Read More Quantum Computers News — ScienceDaily
Magnetic quantum material broadens platform for probing next-gen information technologies
Scientists have used neutron scattering to determine whether a specific material’s atomic structure could host a novel state of matter called a spiral spin liquid. By tracking tiny magnetic moments known as ‘spins’ on the […]
A key role for quantum entanglement
A method known as quantum key distribution has long held the promise of communication security unattainable in conventional cryptography. An international team of scientists has now demonstrated experimentally, for the first time, an approach to […]
Quantum cryptography: Hacking is futile
An international team has successfully implemented an advanced form of quantum cryptography for the first time. Moreover, encryption is independent of the quantum device used and therefore even more secure against hacking attempts. Read More […]
Breakthrough quantum algorithm
Physicists are claiming significant progress in using quantum computers to study and predict how the state of a large number of interacting quantum particles evolves over time. This was done by developing a quantum algorithm […]
Anti-butterfly effect enables new benchmarking of quantum-computer performance
Research drawing on the quantum ‘anti-butterfly effect’ solves a longstanding experimental problem in physics and establishes a method for benchmarking the performance of quantum computers. Read More Quantum Computers News — ScienceDaily
Quantum digits unlock more computational power with fewer quantum particles
For decades computers have been synonymous with binary information — zeros and ones. Now a team has realized a quantum computer that breaks out of this paradigm and unlocks additional computational resources, hidden in almost […]
Physicists use quantum simulation tools to study, understand exotic state of matter
Physicists have demonstrated how simulations using quantum computing can enable observation of a distinctive state of matter taken out of its normal equilibrium. Such novel states of matter could one day lead to developments in […]
The missing photonic link to enable an all-silicon quantum internet
Researchers at Simon Fraser University have made a crucial breakthrough in the development of quantum technology. They have observed over 150,000 silicon ‘T centre’ photon-spin qubits, an important milestone that unlocks immediate opportunities to construct […]
Record entanglement of quantum memories
Researchers from LMU and Saarland University have entangled two quantum memories over a 33-kilometer-long fiber optic connection — a record and an important step toward the Quantum Internet. This is the longest distance so far […]
Error measurements for a quantum annealer
A finite length ferromagnetic chain with opposite spin polarization imposed at its two ends is one of the simplest frustrated spin models. In the clean classical limit the domain wall inserted on account of the […]
Limits on atomic qubit control from laser noise
Researchers studied the unique spectral structure of laser noise and introduced a metric that determines when a stabilised laser source has been optimised for quantum control of atomic qubits. Technical noise present in laser systems […]