Quantum Physics

quant-ph

Quantum information, quantum computation, quantum error correction, and quantum communication.

Sort:

Squeezed Light Evades Back-Action in 40-Kilogram Oscillator

Frequency-dependent squeezing creates a negative imprecision–back-action correlation, cutting observed motion near a feedback-defined resonance by about 47%.

quant-ph gr-qc physics

Sep 20, 20264 min2609.19317

Physics

Open Autoresearch Cuts ECDSA Circuit Spacetime Score

A public evaluator let human and AI contributors optimize reversible point addition to 1.496 billion qubit–Toffoli units, an 86.1% reduction.

quant-ph

Sep 12, 20264 min2609.09582

Physics

Pressure Reveals a Fragile Bright Magnetic Exciton

Hydrostatic compression extinguishes NiPS3 photoluminescence by 1.5 GPa without magnetic, structural, or electronic reconstruction.

quant-ph cond-mat physics

Aug 11, 20264 min2607.27695

Physics

Wafer-Scale Photonics Delivers Broadband Trapped-Ion Addressing

A planar waveguide lens plus printed micromirror routes 405–880 nm light to 5 µm-spaced ions with -27.6 dB average crosstalk.

quant-ph physics

Jul 29, 20265 min2607.25062

Physics

Foundry Quantum Dots Scale Spin-Photon Interfaces

A III–V pilot-line process fabricates thousands of cavity-coupled quantum-dot devices while preserving single-photon purity and spin–photon entanglement.

quant-ph cond-mat physics

Jul 28, 20265 min2606.27787

Physics

Optical Clock Ratios Reach Redefinition-Level Uncertainty

A shared cryogenic-cavity reference sent over 3.6 km phase-stabilized fiber cuts comparison instability 2–3× and reaches ≤3.2×10⁻¹⁸ uncertainties.

quant-ph physics

Jul 28, 20264 min2512.21428

Physics

Fault-Tolerant Dynamics Simulation Finds a Concrete Quantum Crossover

Coherent observable estimation and optimized rotation-state injection reduce sampling overhead, projecting 100-site Ising dynamics in hours instead of decades.

quant-ph hep-th cond-mat

Jul 28, 20265 min2607.16116