⚛️ Category

quant-ph

6391 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

Decoder Dependence in Surface-Code Threshold Estimation with Native Gottesman-Kitaev-Preskill Digitization and Parallelized Sampling

This study quantifies decoder dependence in surface-code threshold estimation under Pauli and native GKP noise regimes using LiDMaS+, demonstrating that while MWPM and Union-Find decoders achieve superior Pareto-optimal performance with stable crossing diagnostics, neural-guided and Belief Propagation decoders are significantly less accurate and robust, thereby establishing a framework for estimator-conditional threshold reporting coupled with runtime-fidelity checks.

Dennis Delali Kwesi Wayo, Chinonso Onah, Vladimir Milchakov, Leonardo Goliatt, Sven Groppe2026-03-30
⚛️ quantum physics

Catalytic Coherence Amplification for Quantum State Recovery: Theory, Numerical Validation, and Comparison with Conventional Error Correction

This paper introduces Catalytic Quantum Error Correction (CQEC), a novel state recovery protocol that utilizes reusable catalyst states to amplify coherence and achieve high-fidelity restoration of quantum states without an error threshold, provided the target state's coherent modes are contained within the noisy state's, a capability validated numerically across diverse quantum algorithms and noise models.

Hikaru Wakaura2026-03-30
🔬 optics

Ultrabroadband Passive Laser Noise Suppression to Quantum Noise Limit through on-chip Second Harmonic Generation

This paper demonstrates a scalable, all-optical "noise eater" using nanophotonic lithium niobate waveguides and second-harmonic generation to passively suppress laser intensity noise by 25–60 dB from DC to over 10 GHz, stabilizing outputs to the quantum noise limit without the bandwidth or complexity constraints of existing methods.

Geun Ho Ahn, Ziyu Wang, Devin J. Dean, Hubert S. Stokowski, Taewon Park, Martin M. Fejer, Jonathan Simon, Amir H. Safavi (…)2026-03-30
⚛️ quantum physics

Two-Gate Extensions of Free Axis and Free Quaternion Selection for Sequential Optimization of Parameterized Quantum Circuits

This paper introduces Two-Gate Fraxis (TGF) and Two-Gate FQS (TGFQS), which extend existing sequential optimizers by simultaneously updating two single-qubit gates via an exact quartic cost function, demonstrating improved convergence to ground states and reduced infidelity in various quantum tasks despite increased measurement overhead.

Joona V. Pankkonen2026-03-30
⚛️ quantum physics

Impact of Topology on Multipartite Entanglement Distribution Protocols in Quantum Networks

This paper presents a systematic study of four multipartite entanglement routing protocols across 81 real-world network topologies, identifying four distinct performance regimes based on structural metrics and demonstrating how topology dictates both optimal protocol selection and the cost-effective deployment of quantum repeaters.

Jazz E. Z. Ooi, Evan Sutcliffe, Alejandra Beghelli2026-03-30
🔬 physics

Geometric Phase Effect in Thermodynamic Properties and in the Imaginary-Time Multi-Electronic-State Path Integral Formulation

This paper demonstrates that the previously developed imaginary-time multi-electronic-state path integral (MES-PI) formulation naturally captures the geometric phase effect arising from conical intersections, and quantifies its impact on low-temperature thermodynamic properties using an ad hoc GP-excluded construction as a comparison baseline.

Jian Liu2026-03-30✓ Author reviewed ⓘ