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.
Scientists have developed a new understanding of how electrons behave in strong magnetic fields. Their results explain measurements of electric currents in three-dimensional materials that signal a quantum Hall effect – a phenomenon thus far […]
Cambridge Quantum Computing (CQC) today announced the discovery of a new algorithm that accelerates quantum Monte Carlo integration – shortening the time to quantum advantage and confirming the critical importance of quantum computing to the […]
The quantum simulation of quantum chemistry shows promise with a novel two-step low-rank factorization method that substantially reduces gate complexity of Hamiltonian and unitary Coupled Cluster Trotter steps, enabling practical implementation on near-term quantum devices with linear connectivity, as demonstrated by a 50-qubit molecular simulation requiring only 4,000 layers of two-qubit gates.
The researchers developed a multi-pixel spectrally resolved detector system that can simultaneously measure multiple parameters of optical frequency combs (mean energy, central frequency, and spectral bandwidth) in a single shot, achieving and even surpassing the standard quantum limit by utilizing quantum frequency combs with multiple squeezed states.
The Quantum Summer Symposium (QSS) is Google Quantum AI’s annual conference. It brings together experts in academia, industry and government to discuss progress in quantum computing research. This year’s event is virtual. If you are […]
A new study finds a unique form of tunable and ultrastrong spin-spin interactions in orthoferrites under a strong magnetic field. The discovery has implications for quantum simulation and sensing.
In this post, Fabio Sanches, Quantum Computing Services Lead for QC Ware, introduces you to QC Ware Forge, which is built on Amazon Braket. It provides turnkey quantum algorithms, so you can speed up research into applying […]
npj Quantum Information, Published online: 25 May 2021; doi:10.1038/s41534-021-00415-0 Quantum nonlocality without entanglement: explicit dependence on prior probabilities of nonorthogonal mirror-symmetric states
npj Quantum Information, Published online: 25 May 2021; doi:10.1038/s41534-021-00420-3 Parallel quantum simulation of large systems on small NISQ computers
This research advances quantum computing by developing and mathematically proving the effectiveness of multi-exponential error extrapolation techniques, while demonstrating how to efficiently combine it with quasi-probability and symmetry verification methods to achieve superior error mitigation in NISQ devices without requiring quantum error correction’s large qubit overhead.
npj Quantum Information, Published online: 24 May 2021; doi:10.1038/s41534-021-00417-y Quantum Zeno effects across a parity-time symmetry breaking transition in atomic momentum space
Google’s new Quantum AI campus. Image: Google Google is aiming to build a “useful, error-corrected quantum computer” by the end of the decade, the company explained in a blog post. The search giant hopes the technology will […]
npj Quantum Information, Published online: 21 May 2021; doi:10.1038/s41534-021-00410-5 Optimal provable robustness of quantum classification via quantum hypothesis testing
This research explores quantum relay technology in non-Markovian conditions, extending beyond traditional independent error models.
Fermions can either exist as individual particles, like electrons, protons, and neutrons, or as so-called quasiparticles. The latter are composed of many components, but behave like a single fermion particle. What characterises fermions is that […]
Entanglement is one of the most important properties of quantum particles and a core resource of many emerging quantum technologies. However, its leverage as a resource is limited as entanglement is a fragile phenomenon that […]
npj Quantum Information, Published online: 20 May 2021; doi:10.1038/s41534-021-00418-x Intensity modulator for secure, stable, and high-performance decoy-state quantum key distribution
Hannah Coleman is a student at the University of Nottingham. She recently co-wrote an article with Professor Matthew Brookes in Physics World on brain sensing MEG scanners. Hannah Coleman I am a final year physics […]
npj Quantum Information, Published online: 19 May 2021; doi:10.1038/s41534-021-00412-3 Entanglement-assisted capacity regions and protocol designs for quantum multiple-access channels
Professor Nicolas Gisin, Honorary Professor of the Physics Section of the University of Geneva and ID Quantique’s co-founder and board member, is among the personalities to be included in the Larousse dictionary 2022 edition. Nicolas Gisin […]
ColdQuanta announced it raised $20 million to continue commercializing cold atom quantum technology and accelerate hiring initiatives. The US-based company has developed technology that allows engineers to cool atoms to a few millionths of a degree […]
Scientists have developed an algorithm to train computers to analyze signals from subatomic particles embedded in advanced electronic materials.
Two research breakthroughs are poised to accelerate the development of synthetic diamond-based quantum technology.
ID Quantique (IDQ), the world leader in quantum-safe security solutions, today launched the Cerberis XG at the Inside Quantum Technology conference (IQT).
Equal1 Laboratories (Equal1), a silicon-based quantum computing company, has announced the company is the first to demonstrate a fully integrated Quantum Processor Unit (QPU) operating at 3.7 kelvin ― a major milestone with implications for the […]