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.
A QuTech-led research team successfully created a three-site Kitaev chain in a hybrid InSb/Al nanowire that demonstrates enhanced stability of Majorana zero modes compared to two-site chains, marking significant progress toward scalable topological quantum computing.
Researchers have demonstrated that quantum information encoded in topological skyrmions remains resilient to environmental noise even as entanglement deteriorates, representing a breakthrough “digitization” approach that could revolutionize practical quantum technologies without requiring complex compensation strategies.
A groundbreaking compact solid-state laser system generates 193-nm coherent light for semiconductor lithography while also producing the first-ever 193-nm vortex beam carrying orbital angular momentum, offering superior coherence and potential applications in wafer processing, defect inspection, and quantum technologies.
Researchers from the University of Innsbruck and the University of Waterloo have achieved a breakthrough in quantum computing by using qudits (quantum units with multiple values) instead of traditional qubits to efficiently simulate quantum electrodynamics in two dimensions, demonstrating magnetic field interactions between particles and opening new possibilities for solving previously intractable problems in particle physics.
QuTech researchers, collaborating with Fujitsu and Element Six, have achieved a significant quantum computing milestone by demonstrating diamond spin-based quantum gates with error rates below 0.1%—satisfying a critical threshold for quantum error correction and bringing us one step closer to scalable quantum computation.
Researchers have successfully created quantum holograms using metasurfaces, enabling unprecedented control over entangled photon pairs where the polarization of one photon can selectively erase holographic content in its partner, demonstrating precise quantum control with applications in secure communication and anti-counterfeiting technology.
Researchers successfully observed “dissipative phase transitions” in quantum systems using a superconducting Kerr resonator at near-absolute zero temperatures, revealing phenomena like “squeezing,” metastability, and “critical slowing down” that could revolutionize quantum computing and sensing technologies through enhanced stability and precision.
D-Wave Quantum Inc. has achieved the world’s first demonstration of quantum computational supremacy on a useful real-world problem, using their Advantage2 prototype quantum annealer to perform complex magnetic materials simulations in minutes that would take a classical supercomputer nearly one million years and consume more than the world’s annual electricity.
The researchers propose a digital-analog quantum computing approach using superconducting circuits to efficiently simulate the Hubbard-Holstein model of fermion-boson interactions with high fidelity, outperforming purely digital methods and offering applications in materials science, chemistry, and high-energy physics.
Lead halide perovskite quantum dots covered with stacked phenethylammonium ligands exhibit nearly non-blinking single photon emission with high purity (~98%) and extraordinary photostability (12+ hours), solving critical surface defect issues through π-π stacking interactions that create a stabilizing epitaxial ligand layer, enabling reliable room-temperature quantum emission for advanced computing and communication applications.
Researchers created a nanoscale ferroelectric moiré pattern using hexagonal boron nitride layers to generate a purely electrostatic potential that enhances Coulomb interactions in transition metal dichalcogenides, enabling optical detection of electron correlations and ordered states while opening pathways to explore exotic quantum phenomena like chiral layer-pseudospin liquids and kinetic magnetism.
Researchers from Chinese universities have revolutionized quantum computing by developing metasurfaces that generate and manipulate entangled photons more efficiently than traditional methods, potentially enabling smaller quantum computers and robust quantum networks.
Researchers achieved a groundbreaking advancement in photonic quantum computing by implementing a boosted Bell-state measurement with a success probability of 69.3%, significantly exceeding the conventional 50% limit and demonstrating a threefold improvement in photon-loss tolerance for fault-tolerant fusion-based quantum computing.
Recent experiments with superconductor-quantum dot hybrids demonstrate that contact-induced level broadening and hybridization effects in thermoelectric Cooper pair splitters lead to shifted resonances and parity reversal in thermoelectric current, revealing new avenues for harnessing nonlocal quantum correlations in solid-state systems through gate voltage control.
Quantum error correction experiments face a trade-off where unconditional qubit reset can theoretically double error tolerance during logical operations, but no-reset approaches perform better in practice when reset operations are slow or error-prone, prompting the development of novel syndrome extraction circuits to mitigate these limitations.
Researchers at China’s USTC have developed Zuchongzhi-3, a groundbreaking 105-qubit quantum computer that processes calculations 10^15 times faster than the most powerful supercomputers and one million times faster than Google’s latest quantum systems, marking a significant advancement in quantum supremacy.
A quantum photonics researcher who pioneered the miniaturization of cold atom trapping systems through integrated photonics at UC Santa Barbara, successfully developing the first photonic integrated 3D magneto-optical trap (PICMOT) that enables portable quantum technologies with applications in precision sensing, timekeeping, and quantum computing.
Researchers developed practical zero-noise extrapolation techniques for quantum annealing that successfully mitigate both thermal and non-thermal errors in quantum systems without additional qubit overhead, demonstrated through experiments on a transverse-field Ising spin chain that aligned well with theoretical predictions.
Researchers have demonstrated circuit-based leakage-detection units that nondestructively identify atom-loss errors in neutral-atom quantum computers with 93.4% accuracy, including a “swap” variant that exchanges data and ancilla atoms, enabling quantum information to potentially outlive individual atoms in the quantum register.
Researchers theoretically demonstrate that Floquet Majorana fermions in periodically driven topological superconductors create 4π-periodic Josephson currents with amplitudes that can be tuned by aligning chemical potentials with drive frequency harmonics, yielding a novel “Josephson Floquet sum rule.”
Time interfaces in materials with suddenly changing refractive indices create unique quantum optical phenomena including photon-pair production and destruction, tunable photon statistics, and opportunities for quantum state engineering.
Amazon Web Services has unveiled Ocelot, a groundbreaking quantum chip that uses cat qubits and bosonic quantum error correction to significantly reduce resource requirements, achieving bit-flip times approaching one second while requiring only one-tenth the resources of traditional approaches, potentially revolutionizing the path to commercially viable quantum computing.
Researchers successfully benchmarked quantum gates up to 52 qubits using a character-average benchmarking protocol, achieving a 63.09% ± 0.23% fidelity for a 44-qubit parallel CZ gate while demonstrating that optimizing global gate fidelity, rather than individual gate fidelities, yields superior performance by accounting for inter-gate correlations.
PQComb revolutionizes quantum information processing by employing parameterized quantum circuits to efficiently transform quantum processes, demonstrating significant improvements in resource efficiency and noise resilience while solving previously intractable problems in quantum unitary transformations.