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

Three-qubit W state tomography via full and marginal state reconstructions on ibm_osaka

This paper demonstrates a proof-of-principle experiment on IBM's ibm_osaka processor showing that a reduced measurement scheme reconstructing two-qubit marginals not only significantly lowers the overhead of three-qubit W state tomography but also yields higher fidelity than full state reconstruction, thereby validating the theoretical result that two-qubit subsystems can uniquely determine the global pure state.

H. Talath, B. P. Govindaraja, B. G. Divyamani, Akshata Shenoy H., A. R. Usha Devi, Sudha2026-02-03

⚛️ quantum physics

Secure One-Sided Device-Independent Quantum Key Distribution Under Collective Attacks with Enhanced Robustness

This paper establishes the security of a one-sided device-independent quantum key distribution protocol against collective attacks by deriving an analytical lower bound on the asymptotic key rate based on the three-setting CJWR steering inequality, demonstrating that the approach offers enhanced robustness to quantum bit error rates and detection inefficiencies compared to fully device-independent protocols.

Pritam Roy, Subhankar Bera, A. S. Majumdar2026-02-03

⚛️ quantum physics

Parrondo paradox in quantum image encryption

This paper proposes a robust quantum image encryption protocol utilizing discrete-time quantum walks on cycles within the NEQR framework, demonstrating that the integration of Parrondo paradox dynamics effectively enhances security by suppressing pixel correlations, achieving high entropy, and maintaining strong diffusion and confusion properties through a low-depth, fully unitary circuit.

Łukasz Pawela2026-02-03

⚛️ quantum physics

Sub-Riemannian geometry of measurement based quantum computation

This paper demonstrates that optimizing resource efficiency in measurement-based quantum computation on subsystem symmetric states is equivalent to solving a sub-Riemannian geodesic problem, thereby revealing a geometric framework for minimizing operational resources to implement target logical unitaries.

Lukas Hantzko, Arnab Adhikary, Robert Raussendorf2026-02-03

⚛️ quantum physics

Embezzlement as a "Self-Test" for Infinite Copies of Entangled States

This paper utilizes C*-algebraic tools to demonstrate that the ability to embezzle a target entangled state imposes a structural constraint on the catalyst, effectively certifying the presence of infinitely many mutually commuting copies of that state within it.

Li Liu2026-02-03

⚛️ quantum physics

Functional Information in Quantum Darwinism: An Operational Measure of Objectivity

This paper proposes a functional information framework to quantify classical objectivity in Quantum Darwinism by measuring the abundance of environment fragments that redundantly encode pointer information, revealing thermodynamic constraints where each additional bit of objectivity doubles the minimal heat dissipation required for record stabilization.

Arda Batin Tank2026-02-03

⚛️ quantum physics

A robust phase of continuous transversal gates in quantum stabilizer codes

The authors identify a robust phase in the surface code where transversal operations and decoding enable continuously tunable logical unitaries with exponentially suppressed infidelity, offering a fault-tolerant protocol that significantly reduces overhead for applications requiring many small-angle rotations like quantum simulation.

Eric Huang, Pierre-Gabriel Rozon, Arpit Dua, Sarang Gopalakrishnan, Michael J. Gullans2026-02-03

⚛️ quantum physics

Isogeny Graphs in Superposition and Quantum Onion Routing

This paper proposes a post-quantum secure quantum onion routing scheme that leverages abelian ideal class group actions and isogeny graphs to enable layered symmetric encryption with both local and non-local key exchanges, offering implementation paths via universal quantum oracles and continuous-time quantum walks.

Eleni Agathocleous, Tobias Hartung, Karl Jansen, Lukas Mansour2026-02-03

⚛️ quantum physics

Entanglement distribution via satellite: an evaluation of competing protocols assuming realistic free-space optical channels

This paper evaluates competing satellite-based entanglement distribution protocols across two network topologies and resource types under realistic free-space optical conditions, determining that a distributed noiseless linear amplification scheme is optimal for triple-satellite networks while direct discrete-variable distribution is best for ground-satellite-ground configurations.

Nicholas Zaunders, Timothy C. Ralph2026-02-03

⚛️ quantum physics

Scalable Quantum Monte Carlo Method for Polariton Chemistry via Mixed Block Sparsity and Tensor Hypercontraction Method

This paper introduces a scalable auxiliary-field quantum Monte Carlo framework that combines mixed block sparsity and tensor hypercontraction to efficiently handle large molecular ensembles in polariton chemistry, achieving robust cubic scaling and reduced memory usage while maintaining high accuracy.

Yu Zhang2026-02-03

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