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 achieved a major quantum computing breakthrough by using a 56-qubit quantum computer to generate certifiably random numbers verified by classical supercomputers, marking a shift from theoretical quantum advantage to practical application with significant implications for cryptography, security, and fairness.
Princeton physicists accidentally discovered and directly visualized Hofstadter’s butterfly—a theoretical fractal pattern of electron energy levels predicted in 1976—using scanning tunneling microscopy on twisted bilayer graphene, revealing not only the long-sought fractal energy spectrum but also new quantum phenomena driven by electron interactions beyond Hofstadter’s original calculations.
Researchers theoretically demonstrate how spin-orbit coupled Bose-Einstein condensates in optical cavities can generate topological optical transparencies with Dirac cones and edge-like states, potentially advancing quantum computation through enhanced light-matter interactions that exhibit phase transitions controllable via Raman detuning and atomic damping.
A team of researchers successfully developed a scanning probe quantum sensor using a single nitrogen-vacancy center at a diamond tip that can image both AC and DC electric fields at nanoscale resolution under ambient conditions, achieving sensitivities two orders of magnitude better than previous attempts and overcoming electric field screening through mechanical oscillation techniques.
esearchers have developed a differentiable, gradient-based optimization method that jointly optimizes both quantum device design parameters and control protocols in a unified framework, demonstrating its effectiveness on superconducting qubit systems.
A theoretical study advancing the composable security analysis of Gaussian quantum networks in finite-size regimes, introducing a novel parameter estimation methodology based on end-user data sharing, while demonstrating potential breakthroughs in surpassing the PLOB bound through quantum amplifier-assisted chains, though practical implementation remains challenging.
Quantum dot-based single-photon sources offer superior security for quantum cryptography through their unique combination of on-demand emission, high brightness, low multiphoton contribution, and tunable coherence in photon-number states, outperforming traditional Poisson-distributed sources across multiple cryptographic primitives.
Research shows that spinning quasiparticles, or magnons, light up when paired with a light-emitting quasiparticle, or exciton, with potential quantum information applications.
A novel architecture has been proposed for implementing high-fidelity deterministic quantum logic gates using photonic qubits that are dual-rail encoded.
Scientists have presented a contraction strategy that makes use of the exact light cone structure of the tensor network representing the observables.
Researchers demonstrated a novel method to generate and control one-way quantum steering between photon and magnon modes in a non-Hermitian cavity magnonic system by leveraging the cooperative effects of coherent and dissipative coupling, achieving robust quantum correlations that can be precisely controlled through the relative phase of cooperative dissipation and magnon mode frequency detuning.
A groundbreaking experimental study validates both the previously tested quadratic (D2 + V2 ≤ 1) and theoretically predicted linear forms of wave-particle duality relations through asymmetric beam interference and photon polarization measurements, revealing that the quadratic form yields more path information and advancing our understanding of these fundamental quantum principles.
Be it magnets or superconductors: materials are known for their various properties. However, these properties may change spontaneously under extreme conditions. Researchers have discovered an entirely new type of such phase transitions. They display the […]
Computer scientists have succeeded in developing a method for systematically finding the optimal quantum operation sequence for a quantum computer. They have developed a systematic method that applies optimal control theory (GRAPE algorithm) to identify […]
Single-electron conveyor-mode shuttling in Si/SiGe quantum channels demonstrates 99.42% fidelity using only four control signals independent of distance, enabling scalable quantum computing architectures by solving the signal-fanout problem in connecting dense qubit registers.
A new method for correcting errors in the calculations of quantum computers potentially clears a major obstacle to a powerful new realm of computing.
Physicists have managed to entangle more than a dozen photons efficiently and in a defined way. They are thus creating a basis for a new type of quantum computer. Read More Quantum Computers News — […]
The research proposes a novel scheme for generating scalable quantum entanglement using ultracold atoms in optical superlattices, where atoms are sequentially entangled in double wells and then reconfigured through lattice phase shifts, resulting in a noise-resistant genuine multipartite entangled state suitable for practical quantum computing implementations.
Scientists have developed a mathematical description of what happens within tiny magnets as they fluctuate between states when an electric current and magnetic field are applied. Their findings could act as the foundation for engineering […]
Researchers have achieved a major step toward large-scale quantum computing by demonstrating error correction in a three-qubit silicon-based quantum computing system. This work could pave the way toward the achievement of practical quantum computers. Read […]
Researchers have proposed that the micromasers can serve as excellent model for future quantum batteries. Read More Quantum Computers News — ScienceDaily
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.
Researchers have addressed the question of efficient implementation of quantum protocols, with small communication and entanglement, and short depth circuit for encoding or decoding.
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 […]
Researchers have successfully created electron-photon pairs in a controlled way in an electron microscope. Read More Quantum Computers News — ScienceDaily
Faster computers, tap-proof communication, sensors beyond standard quantum limit – quantum technologies have the potential to revolutionize our lives just as once the invention of computers or the internet. Experts worldwide are trying to implement […]
The Quantum Industry Day in Switzerland (QIDiS) will be back at the Technopark in Zurich on October 4th, 2022. The Quantum Industry Day gathers academic and industrial R&D to foster exchange and accelerate the development of new quantum […]