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.
Materials consisting of a few atomic layers display properties determined by quantum physics. In a stack of such layers, vibrations of the atoms can be triggered by infrared light. New experimental and theoretical work shows […]
Robert Jonsson (MPQ)Having been invited to give this talk at short notice, I am taking the liberty to present a topic a little bit off from the most beaten paths to you.
npj Quantum Information, Published online: 12 October 2021; doi:10.1038/s41534-021-00481-4 Non-Markovian memory strength bounds quantum process recoverability
npj Quantum Information, Published online: 11 October 2021; doi:10.1038/s41534-021-00486-z Full monitoring of ensemble trajectories with 10 dB-sub-Heisenberg imprecision
Sophia Economou and her student, Bikun LiPhotonic graph states are of interest in quantum communication networks and photonic quantum computing.
npj Quantum Information, Published online: 08 October 2021; doi:10.1038/s41534-021-00489-w Power-optimal, stabilized entangling gate between trapped-ion qubits
A team has developed and demonstrated a novel, fully functional quantum local area network, or QLAN, to enable real-time adjustments to information shared with geographically isolated systems using entangled photons passing through optical fiber. Read […]
Rigetti Computing, a Global Leader in Full-Stack Quantum Computing, Announces Plans to Become Publicly Traded via Merger with Supernova Partners Acquisition Company. BERKELEY, Calif. — Oct. 6, 2021 — Rigetti & Co., Inc. (“Rigetti”), a pioneer in […]
Rahul Trivedi (MPQ):For a continuous time model of spins on d-dimensional lattices with local interaction interrupted by entanglement breaking noise occurring as per poissonian process, I will show that a classical polynomial time algorithm can […]
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npj Quantum Information, Published online: 05 October 2021; doi:10.1038/s41534-021-00476-1 Multipartite entanglement of billions of motional atoms heralded by single photon
In a surprising discovery, an international team of scientists found that deformations in quantum materials that cause imperfections in the crystal structure can actually improve the material’s superconducting and electrical properties. Read More Quantum Computers […]
Researchers have experimentally demonstrated, for the first time, that an assembly of quantum computing pieces — a logical qubit — can be better than the worst parts used to make it. The team shared how […]
Lead-based vacancy centers in diamonds that form after high-pressure and high-temperature treatment are ideal for quantum networks, find scientists. The modified crystal system could also find applications in spintronics and quantum sensors. Read More Quantum […]
With the help of high-resolution microscopy, scientists at MPQ successfully observed the transformation of a metal of magnetic polarons into a normal Fermi liquid. Furthermore, the team was able to measure novel correlations that could […]
npj Quantum Information, Published online: 01 October 2021; doi:10.1038/s41534-021-00485-0 Experimental study of quantum coherence decomposition and trade-off relations in a tripartite system
Scientists studying superconducting qubits identified structural and chemical defects that may be causing quantum information loss — an obstacle to practical quantum computation. Read More Quantum Computers News — ScienceDaily
npj Quantum Information, Published online: 30 September 2021; doi:10.1038/s41534-021-00483-2 Wilson loop and Wilczek-Zee phase from a non-Abelian gauge field
npj Quantum Information, Published online: 30 September 2021; doi:10.1038/s41534-021-00479-y Temporal analog of Fabry-Pérot resonator via coherent population trapping
Scientists have found a rare quantum material in which electrons move in coordinated ways, essentially ‘dancing.’ Straining the material creates an electronic band structure that sets the stage for exotic, more tightly correlated behavior — […]
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Quantum computers are gaining pace. They promise to provide exponentially more computing power for certain very tricky problems. They do this by exploiting the peculiar behaviour of quantum particles, such as photons of light. A […]
Researchers have found a way to make ‘single-crystal flake’ devices that are so thin and free of defects, they have the potential to outperform components used today in quantum computer circuits. Read More Quantum Computers […]
npj Quantum Information, Published online: 28 September 2021; doi:10.1038/s41534-021-00484-1 Entanglement across separate silicon dies in a modular superconducting qubit device
npj Quantum Information, Published online: 24 September 2021; doi:10.1038/s41534-021-00477-0 Simulating quantum computations with Tutte polynomials