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.
Millions of quantum bits are required for quantum computers to prove useful in practical applications. But this is still a long way off. One problem is that the qubits have to be very close to […]
Researchers have established fundamental theoretical bounds on quantum error mitigation techniques, proving that certain performance limitations are unavoidable physics constraints rather than technological shortcomings, with sampling overhead scaling exponentially with circuit depth for local depolarizing noise and confirming the optimality of probabilistic error cancellation for mitigating local dephasing noise.
The Novo Nordisk Foundation has awarded a grant of US$ 200 million (DKK 1.5 billion) to establish the first full-scale quantum computer for the development of new medicines and provide new insights into climate change and the […]
Across the world, specialists are working on implementing quantum information technologies. One important path involves light: Looking ahead, single light packages, also known as light quanta or photons, could transmit data that is both coded […]
This research demonstrates a groundbreaking implementation of three-qubit Fredkin and Toffoli gates on a programmable quantum photonic chip, overcoming previous limitations of pre-entangled input states and bulk optics systems by using controlled Mach-Zehnder interferometers to enable independent input photons, marking a significant advance toward scalable quantum processors.
The researchers developed MBP (Memory-effect Belief Propagation), an enhanced version of traditional belief propagation that incorporates memory effects and neural network-like inhibition functionality, enabling efficient decoding of highly degenerate quantum error-correcting codes with significantly improved performance, achieving error thresholds of 16% and 17.5% for surface and toric codes respectively.
Paris and Palo Alto, September 14, 2022 – SandboxAQ, an enterprise SaaS company delivering the compound effects of AI and Quantum tech (AQ) to governments and the Global 1000, today announced it has acquired Cryptosense, a leading cybersecurity and […]
Qkrishi Quantum Private Limited and SRM Institute of Science and Technology (SRMIST) have partnered to set up the SRMIST Qkrishi Centre of Excellence in Quantum Information and Computing (SQ-QuIC).
The ARQ19 patent’s claim of achieving long-range quantum key distribution without trusted nodes is unfounded because it relies on an unexplained confidential classical channel between end users that cannot be quantum-based due to distance limitations, making the system’s security ultimately dependent on this non-quantum channel rather than achieving true quantum security.
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.