⚛️ Category

quant-ph

11028 papers

Quantum physics explores the strange and often counterintuitive rules that govern the universe at its smallest scales. This field investigates how particles like electrons and photons behave in ways that defy our everyday intuition, forming the backbone of modern technologies from lasers to future quantum computers. While the mathematics can be daunting, the core ideas promise to revolutionize how we understand reality and process information.

At Gist.Science, we make these complex discoveries accessible to everyone. We systematically process every new preprint published in the Quant-Ph category on arXiv, transforming dense academic papers into clear, plain-language explanations alongside detailed technical summaries. Whether you are a seasoned researcher or a curious reader, our goal is to bridge the gap between cutting-edge theory and human understanding.

Below are the latest papers in quantum physics, distilled to help you grasp the newest breakthroughs without getting lost in the jargon.

⚛️ quantum physics

A Multi Affine Geometric Framework for Quantum Nonlocality. Unifying Berry Phases, Entanglement, and Coherence

This paper proposes a multi-affine geometric framework that unifies Berry phases, entanglement, and coherence to analyze how recorded phase noise and deterministic compression affect CHSH correlations, revealing that while specific entropy metrics can predict recoverable violations, finite readouts may yield contradictory outcomes, thereby establishing model-dependent reliability certificates rather than universal bounds for entanglement lifetime or detector acceleration.

Shoshauna Gauvin2026-09-15
⚛️ quantum physics

GRPO-QM: Target Preserving Exploration for Quantum Tomography

The paper introduces GRPO-QM, a target-preserving exploration method for quantum tomography that uses a group-relative policy with exact Metropolis correction to maintain posterior stationarity, revealing that while learned strategies offer limited gains over physical proposals and priors, objective scaling significantly impacts the performance of sampled versus exact gradient training.

Yufeng Wang, Parivesh Priye, Lu Wei, Haibin Ling2026-09-15
⚛️ quantum physics

Rank-Dependent Error Bounds and Near-Optimality in Quantum Control via Hierarchical Tucker Surrogates

This paper establishes a certified finite-horizon quantum optimal-control framework using fixed-rank Hierarchical Tucker surrogates, proving that under uniform truncation-accuracy conditions, the method yields exponentially decaying errors and near-optimal controls while providing logarithmic rank-performance relations and a posteriori cost certificates validated by numerical experiments on XXZ spin chains.

Nahid Binandeh Dehaghani, Rafal Wisniewski, Julian Berberich, A. Pedro Aguiar2026-09-15
⚛️ quantum physics

Quantum Codes for Generalized Amplitude-damping Noise

This paper introduces a framework for probabilistic approximate quantum error correction (PAQEC) and demonstrates its effectiveness through a five-qubit permutation-invariant code that achieves quadratic fidelity scaling against generalized amplitude-damping noise, outperforming conventional deterministic codes while offering a numerical optimization method for identifying optimal recovery maps.

Sourav Dutta, Anubhab Rudra, Manav Seksaria, Anil Prabhakar, Prabha Mandayam2026-09-15
⚛️ quantum physics

Generation of entanglement and magic via continuous homodyne monitoring of a qubit pair

This paper demonstrates that continuous homodyne monitoring of two qubits coupled to a common electromagnetic field, described via a collision-model Stochastic Master Equation, serves as a tunable mechanism to generate entanglement and enhance quantum magic through trajectory-dependent nonlinear effects that are absent in unconditional dynamics.

Debmalya Das, Giuseppe Magnifico, Maria Maffei2026-09-15
⚛️ quantum physics

Limits on the atomic description of four-wave mixing

This study experimentally demonstrates that while a comprehensive single-atom model accurately predicts photon counts and specific polarization correlations in four-wave mixing, it fails to account for coincidence rates in opposite polarization configurations, thereby revealing the necessity of incorporating collective phenomena beyond individual atomic dynamics.

Irvin F. Ángeles-Aguillón, Nieves Arias-Téllez, Pablo Yanes-Thomas, Alejandro Kunold, Daniel Sahagún-Sánchez2026-09-15
⚛️ quantum physics

Instantiating Microcrypt: Obstacles and opportunities via tailored state certification

This paper refutes the conjecture that Hamiltonian phase state assumptions can exist without one-way functions by proving that these assumptions actually imply the existence of one-way functions, while simultaneously establishing a general framework for constructing efficiently verifiable one-way puzzles through tailored state certification protocols.

Jose Carrasco, Jens Eisert, Soumik Ghosh, Dominik Hangleiter, Nicky Kai Hong Li, Ryan Sweke2026-09-15