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

Squeezed-state semi-device-independent quantum randomness generation

This paper derives a closed-form expression for the certified asymptotic Shannon rate in semi-device-independent quantum randomness generation using a trusted binary pure-state source and an untrusted binary detector, demonstrating that including deterministic extreme points in the POVM optimization yields a correct, lower bound and applying this result to analyze the impact of squeezing on squeezed-coherent BPSK sources.

Hamid Tebyanian2026-06-03

🔬 optics

Quantum Erasure Imaging: Complementary Modalities from Delayed-Choice Erasure

This paper introduces Quantum Erasure Imaging (QEI), a practical protocol that utilizes delayed-choice erasure on entangled photon pairs to simultaneously reconstruct complementary absorption and phase-sensitive modalities from a single run of time-tagged coincidences via retrospective sorting, offering advantages in single-run acquisition, perfect co-registration, and remote mode selection.

Sean D Huver, Sanjaya Lohani2026-06-03

⚛️ quantum physics

Practical gates by Majorana fermion motion

This paper introduces a framework for planar Pauli stabilizer codes using Majorana fermions to store logical information in pairwise parities, enabling fault-tolerant braiding-based logical gates that achieve lower space overhead and improved error rates compared to lattice surgery.

Yuri D. Lensky, Bryce Kobrin, Kostyantyn Kechedzhi, Igor Aleiner2026-06-03

🔬 optics

Coexistence of dipolar and quadrupolar higher-order topology

This paper presents a theoretical and numerical demonstration of a two-dimensional system that simultaneously exhibits both dipolar and quadrupolar higher-order topological phases, challenging the previous view that these classes are mutually exclusive, and proposes a practical implementation using laser-written optical waveguide arrays.

Konstantin Rodionenko, Maxim Mazanov, Maxim A. Gorlach2026-06-03

⚛️ quantum physics

Operator spreading in random circuits with orthogonal or symplectic symmetry

This paper investigates operator spreading in random quantum circuits with orthogonal or symplectic symmetry, revealing distinct features such as ternary-valued weight relaxation, finite-width domain walls, and a fundamental dichotomy in butterfly velocity behavior that differs significantly from the well-studied unitary-invariant case.

Zhiyang Tan, Piet W. Brouwer2026-06-03

⚛️ quantum physics

Informational completeness of qubit measurements and IC preservability of qubit channels: Characterization and Quantification

This paper introduces and characterizes a faithful measure for the informational completeness of qubit measurements, demonstrates that symmetric informationally complete measurements maximize this property, and defines a corresponding "IC preservability" metric for quantum channels that reveals a fundamental connection to the channel's absolute output coherence.

Jatin Ghai, Arindam Mitra2026-06-03

⚛️ high-energy theory

Pure states for subregions in gravity and their entanglement entropy

This paper proposes a framework where spatial subregions in quantum gravity are assigned pure states via a partially frozen gravitational path integral, leading to a new holographic prescription for entanglement entropy that satisfies key consistency conditions and introduces an observer-dependent entanglement wedge.

Zixia Wei2026-06-03

⚛️ quantum physics

Molecular Ground State Simulation by Subspace Restriction and Hund's Rule

This paper introduces the Subspace Restriction Scheme (SRS) and the Multi-Hund Subspace (MHS) to significantly reduce qubit requirements and optimize variational quantum eigensolver performance for simulating molecular ground states by projecting the Hamiltonian onto a physically motivated, reduced Fock subspace.

Tsung-Chi Chiang, Calvin Ku, Jyh-Pin Chou, Alice Hu, Peng-Jen Chen, Ching-Jui Lai2026-06-02

⚛️ quantum physics

Efficient Hamiltonian, structure and trace distance learning of Gaussian states

This paper introduces efficient protocols for learning the Hamiltonian, interaction graph, and trace distance of positive-temperature bosonic Gaussian states using only heterodyne measurements, achieving logarithmic sample complexity in the number of modes through a novel "local inversion" technique that bypasses the need for precise global covariance estimates.

Marco Fanizza, Cambyse Rouzé, Daniel Stilck França2026-06-02

⚛️ high-energy theory

Numerical evidence for the non-Abelian eigenstate thermalization hypothesis

This paper provides numerical evidence supporting the non-Abelian eigenstate thermalization hypothesis (ETH) through simulations of a 1D Heisenberg chain and offers an analytical proof of its self-consistency, thereby establishing a framework for understanding thermalization in quantum systems with non-commuting conserved quantities.

Aleksander Lasek, Jae Dong Noh, Jade LeSchack, Nicole Yunger Halpern2026-06-02

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