1+ hour, 57+ min ago  (937+ words) Can we fully characterise a quantum system by simultaneously observing its position *and* momentum? Until now, quantum gas microscopy has been limited to position-basis detection, but new protocols allow averaged-mode phase space microscopes to retrieve momentum density averages with arbitrary…...

2+ hour ago  (1110+ words) Conventional quantum models assume interactions happen instantaneously, a simplification akin to believing sound travels without delay. Now, observations of an artificial atom reveal how introducing even a slight time delay alters quantum behaviour, defying that "memoryless" assumption. This demonstration marks…...

2+ hour, 12+ min ago  (243+ words) Can a material undergo a phase transition when the laser pulse delivering the energy lacks sufficient bulk heat to trigger it. Vanadium dioxide does precisely that, absorbing light not as a wave but as discrete, localized photon energies. This localized…...

2+ hour, 8+ min ago  (1387+ words) Previously, molecular simulations routinely overlooked a subtle quantum effect linked to molecular shape and reactivity. Now, a refined computational method inherently accounts for this geometric phase, promising more accurate predictions of molecular behaviour at low temperatures. This advance corrects a…...

2+ hour, 7+ min ago  (1124+ words) Could a computer program design a better quantum algorithm than a human expert? Hive, an artificial intelligence platform, has now demonstrated this capability, autonomously discovering quantum algorithms for LiH, H2O, and F2 molecules that require fewer computational steps than existing methods. This…...

2+ hour, 25+ min ago  (1328+ words) Simulating quantum chemistry systems has long been constrained by the limits of classical computation. Now, Hyperion expands the accessible emulation frontier to 36 to 40 qubits, improving on previous methods and enabling simulations approaching the exact Full Configuration Interaction / Complete Basis Set…...

2+ hour, 13+ min ago  (863+ words) Extended-basis Auxiliary Field Quantum Monte Carlo now achieves correlation precision matching methods like Coupled Clusters and Density Matrix Renormalization Group, but with markedly improved scaling. This advance addresses a key limitation in modelling complex molecules, previously restricted by computational demands....

4+ day, 1+ min ago  (1557+ words) Researchers at MIT discovered that electrons within novel "moir" crystals" behave as if moving in four dimensions, simulating properties of hypothesized 4D quantum materials. This behavior occurs despite existing within our three-dimensional world. https://quantumzeitgeist.com/wp-content/uploads/mit-electrons-acting-four-dimensions-within.jpg MIT physicists have created three-dimensional "moir" crystals…...

5+ day, 4+ hour ago  (1046+ words) Multipartite controlled-NOT gates using molecules and Rydberg atoms Four-qubit systems now demonstrate CNOT gate fidelities exceeding 99%, a marked improvement over previous multi-qubit gate performance. This advance employs a novel combination of polar molecules and Rydberg atoms, utilising an unconventional pumping…...

5+ day, 21+ hour ago  (1362+ words) Can quantum computers accurately model systems at temperatures where thermal noise overwhelms the signal? A new algorithm achieves this by scaling circuit depth linearly with system size, requiring only single-qubit rotations and nearest-neighbour CNOT gates for n modes. This delivers…...