Quantum Physics · Physics & Astronomy
Quantum Physics
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3,630 papers, from 4 September 2026 to 5 November 2026: 3,630 arXiv preprints.
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Newest papers, page 107
Adaptive complete quantum search with unknown number of solutions
Unstructured database search is a fundamental problem that requires finding one or more elements satisfying a specific property within a set of candidates.Value of spatially multiplexed SNSPDs with photon-number-resolving capabilities
We develop a combinatorial and Bayesian framework to quantify the information gained by increasing the local photon-number resolution of multiplexed detection systems based on superconducting…When is the Clifford hierarchy generalized semi-Clifford?
We study semi-Clifford and generalized semi-Clifford structures in the Clifford hierarchy as a function of hierarchy level $k$ and qubit number $n$.Lindblad equation for the quantum Rabi model in the deep strong coupling regime
We derive a quantum master equation in Lindblad form for the open quantum Rabi model in the perturbative deep strong coupling regime, where the spectrum is close to degenerate and harmonic.A Practical Introduction to VQE: Methods, Challenges, and Applications in Physics and Chemistry
The Variational Quantum Eigensolver (VQE) has become a central hybrid quantum-classical method for addressing electronic structure and materials science problems on near-term quantum hardware.A programmable quantum photonic platform integrating coherent emitters
Photonic quantum technologies require the integration of high-quality quantum light sources with programmable photonic circuitry to enable on-chip quantum information processing.The right entanglement for perfect nonlocality and zero-error communication
We identify a structural mechanism by which perfect play in a nonlocal game requires and self-tests a specific non-maximally entangled state.Causal memory and structural complexity of a quantum space series
What makes one quantum process more complex than another?Classical Simulation of Lossy Gaussian Boson Sampling beyond Square-Root Regime
Photon loss makes Gaussian boson sampling easier to simulate classically.Closed-Form Arbitrary-Gap Rényi Nonadditivity Above Any Positive Order via Direct Products of Free Groups and High-Girth Graphs
We give a closed-form finite-dimensional construction of quantum channels with real algebraic entries exhibiting arbitrarily large violations of minimum-output Rényi entropy additivity uniformly…The Mermin-Peres Magic Square Game With Three or More Players
We present a generalization of the Mermin-Peres magic square game to $N$ players, in which the square is replaced by an $N$-dimensional hypercube.Symmetry and AI-assisted discovery of magic-state factories
Magic-state distillation is a major resource cost in fault-tolerant quantum computing.Products of unitaries as continuous evolutions at finite precision
I present a short approach to discretizing continuous unitary evolution.Mid-circuit measurements and feedforward implement every unitary exactly in constant depth
Mid-circuit measurements with feedforward reduce the optimal worst-case quantum depth for exact $n$-qubit unitary synthesis from $Θ(n)$ to $O(1)$, using arbitrary one- and two-qubit gates and…CT-bMPS: Approximate Tensor Network Contraction with Boundary MPS on Contraction Trees
We introduce contraction tree boundary matrix product states (CT-bMPS), a scalable approximate contraction method for general closed tensor networks.Shaping double descent in quantum extreme learning through model design
Increasing capacity can induce a machine learning model to generalize worse until it perfectly interpolates the training data, and better once it moves beyond interpolation.Information causality does not single out the set of quantum correlations
Information causality (IC) was introduced as a physical principle that imposes constraints on the non-local correlations between two parties (Alice and Bob) in a Bell scenario.Staying Sober: A Shot-Free Predictor of Logical Error Rates for Concatenated Quantum Error Correcting Codes
Estimating the logical error rate (LER) of a quantum error-correcting (QEC) code by Monte Carlo sampling takes $O(p^{-\lceil d/2 \rceil}/\varepsilon^2)$ samples at physical error rate $p$, code…Quantum codes are quantized codes: Stabilizer codes from quantization over finite fields
We present a discrete analogue of geometric quantization over finite fields which, when applied to certain classical error-correcting codes, yields quantum error-correcting codes.Quantum Krylov Linear Solving Beyond Global Conditioning via Spectral Compression and Directional Stability
Global condition-number dependence can substantially overestimate the difficulty of preparing normalized quantum linear-system solutions.