⚛️ Category

quant-ph

8792 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

Quantum Inversion of Units in Group Rings: Block Dimension, Not Commutativity, Governs Hardness

This paper demonstrates that unit inversion in group rings, including those based on dihedral groups previously thought secure, can be solved efficiently in both classical and quantum polynomial time by decomposing the ring into small matrix blocks via generalized Fourier transforms, thereby invalidating the security of such schemes and necessitating a new structural approach to cryptography.

Bhanwar Gupta2026-09-11
⚛️ quantum physics

A nonrecursive method for computing the off-diagonal small-time heat kernel expansion

This paper presents a nonrecursive method for computing closed-form expressions of the off-diagonal small-time heat kernel expansion coefficients up to second order for the Klein-Gordon operator in flat space-time with electromagnetic fields, extending previous diagonal-only approaches and verifying accuracy against plane wave and constant field cases.

Vyacheslav O. Guba, Alexey V. Reznichenko2026-09-11
🔬 condensed matter

Geometric Ginzburg-Landau theory of charge ordering and commensurability

This paper establishes a geometric Ginzburg-Landau theory demonstrating that quantum geometry is essential for charge density wave formation and commensurability transitions, providing a new criterion that successfully resolves longstanding discrepancies in transition-metal dichalcogenides where traditional kinetic models fail.

Aneesh Agarwal, Rutvij Gholap, Mohammad Saeed Bahramy, Robert-Jan Slager2026-09-11
⚛️ high-energy theory

Quantum State of a Gravitating Spacetime Region

This paper proposes a framework that associates quantum states to arbitrary closed spacetime regions by defining a gravitational Hilbert space via path integrals over complexified geometries, thereby establishing a correspondence between non-asymptotic spacetime regions and quantum states that explains the efficacy of tensor network models while revealing that von Neumann entropy is determined solely by maximin surfaces independent of complex deformations.

Raphael Bousso, Sami Kaya, Guanda Lin, Arvin Shahbazi-Moghaddam2026-09-11
⚛️ quantum physics

Tight Time-Space Lower Bounds for Collision Finding and Element Distinctness under Label Symmetry

This paper establishes tight time-space lower bounds for collision finding and element distinctness under label symmetry by developing a space-sensitive compressed oracle technique, proving that any such algorithm requires T=Ω(N1/3)T=\Omega(N^{1/3}) queries and T2S=Ω(Nlog⁡N)T^2S=\Omega(N\log N) resources, thereby confirming the optimality of existing quantum algorithms like BHT and Ambainis's quantum walk within this class.

Frédéric Magniez, Sebastian Zur2026-09-11