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News
Privacy-First Quantum Ensembles Learn From Labels No One Can See
2+ hour, 53+ min ago (709+ words) Quantum machine learning has long promised a new kind of computational power, but a quieter revolution is now underway at the intersection of quantum algorithms and data privacy....
Physicists Map When Lost Qubit Coherence Can Come Back to Life
5+ hour, 40+ min ago (581+ words) A quantum bit that has lost its coherence is usually written off as a casualty of its noisy environment, but a new theoretical study argues that this verdict is often premature — and, more importantly, predictable....
Scientists just simulated the “impossible” — fault-tolerant quantum code cracked at last
17+ hour, 19+ min ago (261+ words) Quantum computers have the potential to solve complex problems that no supercomputer today can handle. In the foreseeable future, quantum technology's computing power is expected to revolutionise fundamental ways of solving problems in medicine, energy, encryption, AI, and logistics. "The…...
1000 Times faster: Swedish breakthrough cuts quantum computer error risks
1+ day, 23+ hour ago (271+ words) A single-period Floquet control method using "quantum lattice gates" to execute operations on bosonic quantum codes over a thousand times faster... Researchers at Chalmers University of Technology, in collaboration with Tianjin University, have developed a single-period Floquet control method using…...
Scientists find a way to run error-protected quantum operations 1,000 times faster
15+ hour, 46+ min ago (1157+ words) Quantum computers face a race against time every time they perform a calculation. Their quantum states are so fragile that even tiny disturbances from electrical noise, heating, radiation or imperfect hardware can push a computation away from its intended result....
Hidden Geometry of Quantum States Yields New Shortcuts for Optimal State
11+ hour, 35+ min ago (70+ words) One of the most fundamental questions in quantum information theory is deceptively simple to state: given a quantum system that could be in any one of several possible states, how well can we guess which one it actually is? Because…...
Quantum Simulator Finds A 'pseudogap' In A Model Material
1+ day, 12+ hour ago (270+ words) This peak doesn’t simply indicate a change in density; it signals “an inflection point in the equation of state,” effectively delineating a boundary between underdoped and overdoped metallic regimes at large interactions. Further investigation utilizing lattice modulation spectroscopy provided complementary…...
Researchers Optimise Penning Traps For Single-Electron Qubits
1+ day, 14+ hour ago (877+ words) Millimetre-scale Penning traps previously relied upon approximations becoming inaccurate as device dimensions shrink. Now, an analytical solution offers precise design choices for optimising planar Penning trap geometry and voltage settings at sub-millimetre scales. This advancement minimises unwanted distortions in confining…...
Researchers Measure Quantum Processor Speed Using New Benchmark
1+ day, 10+ hour ago (961+ words) A sustained execution rate of over one million circuit layer operations per second now defines a new standard for assessing quantum computer performance. Until recently, benchmarking focused on fidelity alone, overlooking how quickly these machines could actually run complex calculations…...
Researchers Bound Quantum Infidelity During Simulation Periods
1+ day, 7+ hour ago (806+ words) Tape-recorder coarse graining delivers accurate results for Lorentzian and flat-band reservoirs where existing hierarchical equations of motion calculations fail to converge. This new technique dynamically manages computational demands during quantum nanostructure simulation without sacrificing fidelity, yielding Coulomb blockade peak splitting…...