quant-ph papers | Gist.Science

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

Yang-Lee Criticality as a Dissipative Dynamical Phase Transition: Quantum Simulation of non-Hermitian Physics without Post-selection

This paper proposes a method to realize Yang-Lee criticality and simulate arbitrary non-Hermitian Hamiltonians in open quantum systems without post-selection by engineering local dissipation and unitary dynamics, thereby enabling the direct observation of dissipative phase transitions and non-unitary statistical mechanics on near-term quantum devices.

Stephen W. Yan2026-08-27

⚛️ general relativity

Torsion balances as operational probes of semiclassical gravity: Matched-filter bounds, torque-diffusion constraints, and quantum-noise benchmarks

This paper establishes a comprehensive framework for using calibrated torsion-balance spectra to constrain both deterministic and stochastic deviations from Newtonian gravity, deriving matched-filter bounds and torque-diffusion limits that link experimental data to semiclassical gravity searches without directly testing the full relativistic semiclassical Einstein equation.

Jyotirmaya Mohanta, Yutaka Shikano2026-08-27

🔬 mesoscale physics

Exact analytical spectrum, eigenstates, and quantum geometry of the quarter-flux Harper-Hofstadter model

This paper derives exact analytical expressions for the spectrum, eigenstates, and full quantum geometric tensor of the quarter-flux Harper-Hofstadter model by exploiting its sublattice symmetry, thereby demonstrating that its lowest band constitutes a nearly ideal Chern band suitable for fractional Chern insulator physics.

Isaac Tesfaye, André Eckardt2026-08-27

⚛️ quantum physics

Optimal, and approximately optimal, quantum strategies for $\mathrm{XOR}^{*}$ and $\mathrm{FFL}$ games

This paper extends Ostrev's 2016 framework to characterize optimal and approximately optimal quantum strategies for $\mathrm{XOR}^{*}$ and $\mathrm{FFL}$ games, specifically establishing error bounds for the duality gap between classical and quantum performance based on winning probabilities and representation-theoretic intertwining operations.

Pete Rigas2026-08-26

⚛️ quantum physics

Quantum Maximum Entropy Inference and Hamiltonian Learning

This paper extends classical maximum entropy inference and graphical model learning algorithms, such as GIS and gradient descent, to the quantum realm by rigorously analyzing their convergence rates through spectral radius bounds and significantly enhancing their performance via quasi-Newton methods like Anderson mixing and L-BFGS for applications in Hamiltonian learning.

Minbo Gao, Zhengfeng Ji, Fuchao Wei2026-08-26

⚛️ quantum physics

Online Learning of Pure States is as Hard as Mixed States

This paper demonstrates that in the online learning framework, learning pure quantum states is as computationally difficult as learning mixed states, as both classes share nearly identical sequential fat-shattering dimensions and regret scaling.

Maxime Meyer, Soumik Adhikary, Naixu Guo, Patrick Rebentrost2026-08-26

🔬 optics

An Optical Emulation of the BB84 Quantum Key Distribution Protocol

This paper presents an accessible, fiber-optic apparatus using many-photon systems to visually emulate the key generation, transmission, and basis-sifting steps of the BB84 quantum key distribution protocol as an educational tool.

Alec L. Riso, Karthik Thyagarajan, Connor Whiting, Katherine Jimenez2026-08-26

⚛️ quantum physics

Reconquering Bell sampling on qudits: stabilizer learning and testing, quantum pseudorandomness bounds, and more

This paper introduces a novel generalization of Bell sampling to qudits of all dimensions $d \geq 2$ , leveraging a new unitary based on Lagrange's four-square theorem to enable efficient stabilizer learning, testing, and pseudorandomness bounds that were previously unknown for higher-dimensional quantum systems.

Jonathan Allcock, Joao F. Doriguello, Gábor Ivanyos, Miklos Santha2026-08-26

⚛️ quantum physics

Interaction-Resilient Scalable Fluxonium Architecture with All-Microwave Gates

This paper proposes an interaction-resilient, scalable fluxonium square-grid architecture that utilizes all-microwave gates and specific design strategies to suppress parasitic long-range interactions, enabling fast high-fidelity two- and three-qubit gates suitable for large-scale quantum processors.

Andrei A. Kugut, Grigoriy S. Mazhorin, Ilya A. Simakov2026-08-26

⚛️ quantum physics

Holographic codes seen through ZX-calculus

This paper re-examines the pentagon holographic quantum error correcting code using ZX-calculus to derive diagrammatic insights into its stabilizers, logical operators, and entropy, while also introducing a new family of codes on dual hyperbolic tessellations and demonstrating the construction of fault-tolerant spacetime ZX-diagrams.

Kwok Ho Wan, H. C. W. Price, Qing Yao, Zhenghao Zhong, Ainhoa Zapirain2026-08-26

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quant-ph

Yang-Lee Criticality as a Dissipative Dynamical Phase Transition: Quantum Simulation of non-Hermitian Physics without Post-selection

Torsion balances as operational probes of semiclassical gravity: Matched-filter bounds, torque-diffusion constraints, and quantum-noise benchmarks

Exact analytical spectrum, eigenstates, and quantum geometry of the quarter-flux Harper-Hofstadter model

Optimal, and approximately optimal, quantum strategies for XOR∗\mathrm{XOR}^{*}XOR∗ and FFL\mathrm{FFL}FFL games

Quantum Maximum Entropy Inference and Hamiltonian Learning

Online Learning of Pure States is as Hard as Mixed States

An Optical Emulation of the BB84 Quantum Key Distribution Protocol

Reconquering Bell sampling on qudits: stabilizer learning and testing, quantum pseudorandomness bounds, and more

Interaction-Resilient Scalable Fluxonium Architecture with All-Microwave Gates

Holographic codes seen through ZX-calculus

Optimal, and approximately optimal, quantum strategies for $\mathrm{XOR}^{*}$ and $\mathrm{FFL}$ games