⚛️ Category

quant-ph

10738 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.

🔢 mathematics

An algebraic characterisation of nn-qubit pure-state invariants

This paper provides a comprehensive algebraic characterisation of nn-qubit pure-state invariants by linking quadratic functions of Pauli expectation values to symplectic polar spaces and Lie algebras, thereby revealing new structural properties of the Pauli group, classifying state-independent uncertainty relations and channels, and demonstrating that specific stabiliser orbits form complex projective and symplectic 2-designs.

Markus Frembs2026-10-28
⚛️ high-energy theory

Momentum-space entanglement and mutual information in Kaluza-Klein reduction

This paper demonstrates that in Kaluza-Klein reductions of interacting scalar fields, the four-dimensional effective theory accurately describes low-energy observables via local operators but fails to capture the non-pure nature of the reduced quantum state, as the momentum-space entanglement and mutual information between zero modes and the massive tower arise from time-nonlocal effects and grow logarithmically with the number of levels rather than being dominated by the lightest modes.

Udaykrishna Thattarampilly, Yunlong Zheng2026-10-28
⚛️ phenomenology

An open EFT for dark matter searches with matter-wave interferometers

This paper develops an open Effective Field Theory framework using the Schwinger-Keldysh formalism to model matter-wave interferometers as open quantum systems interacting with dark matter, revealing how this approach distinguishes between phase shifts and decoherence and enables the probing of sub-GeV dark matter, including Higgs-portal candidates and scenarios with tachyonic in-medium mediators, through both atomic and composite-particle interferometers.

Leonardo Badurina, Kathryn M. Zurek2026-10-28
⚛️ high-energy theory

Non-Hermitian Schwinger effect in an imaginary magnetic field

This paper investigates the non-Hermitian Schwinger effect in scalar and Dirac QED under a real electric field and a parallel imaginary magnetic field, revealing that the imaginary field induces a nonzero vacuum decay rate even without an electric field, creates unique pole structures in the effective Lagrangian, and leads to complex interference phenomena such as cancellation mechanisms and sinusoidal field dependencies in the decay rate.

Ahmad Jafar Arifi, Kei Suzuki2026-10-28
🔬 materials science

Amorphization-Depth-Dependent Bismuth Redistribution and Activation in Silicon for Quantum Devices

This study demonstrates that while both direct implantation and preamorphization of bismuth into silicon yield high substitutional fractions after annealing, the deeper amorphous layer created by preamorphization significantly enhances electrical activation by mitigating the trapping of bismuth at end-of-range defects.

Youcef A. Bioud, Simon-Jean Michel, Sebastien Francoeur, Sjoerd Roorda, Eva Dupont-Ferrier2026-10-28