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.

🌀 nonlinear sciences

Benchmarking Proton Tunneling Splittings with a Wavefunction-Based Double-Well Model: Application to the Formic Acid Dimer

This paper develops and validates a wavefunction-based one-dimensional Cornell-type double-well model for calculating proton tunneling splittings, demonstrating its effectiveness as a benchmarking tool by accurately reproducing the tunneling splitting of the formic acid dimer while highlighting the pedagogical value and limitations of simplified models compared to full multidimensional quantum treatments.

Krishna Kingkar Pathak2026-09-24✓ Author reviewed ⓘ

🔬 optics

Theory of Airy-Beam Wavefront Sensing

This paper presents a compact wavefront sensing framework that utilizes the interference of counter-accelerating Airy beams generated from a single Gaussian source to accurately reconstruct aberrated wavefronts without requiring collection optics, achieving sub-microradian precision even in noisy conditions.

Surya Kamal2026-09-24

⚛️ quantum physics

Quantum-Enhanced Sampling of Schrödinger Bridges

This paper proposes a quantum-enhanced framework for the dynamic Schrödinger bridge problem on finite state spaces that utilizes quantum walks and a quantum box-constrained Newton method to achieve linear dependence on the time horizon and improved $N^{3/2}$ complexity in state-space size, respectively, outperforming classical Gibbs sampling and matrix-scaling approaches.

Tom Lollier, Eyal Neuman2026-09-24

⚛️ quantum physics

Programmable Coherent Memory Kernels for Quantum Reservoir Computing in Waveguide QED

This paper introduces a waveguide-QED quantum reservoir computing architecture that engineers task-relevant memory profiles by using spatially separated coupling points to create coherent, non-Markovian delayed feedback, where waveguide propagation controls the timing of memory return and Kerr nonlinearity generates the necessary temporal features for optimal prediction.

Hong Jiang, Yu Wu, Yue Ban, Xi Chen, Juan José García-Ripoll2026-09-24

🔢 mathematics

Optimal low-rank compression of quantum dynamics

This paper establishes the fundamental limits on the information required to represent local quantum dynamics through low-rank compression, determining that optimal ranks scale as $\widetilde O(t+\sqrt{\log(1/\epsilon)})$ for time-independent evolution and $\widetilde O(t^{2/3})$ for driven systems, with these bounds being constructively achieved in one dimension via explicit tensor network algorithms.

Hugo Mackay, Donghoon Kim, Tan Van Vu, Tomotaka Kuwahara2026-09-24

⚛️ quantum physics

Equivalence of maximal and generic reachability for non-universal Variational Quantum Circuits

This paper establishes the equivalence of maximal and generic reachability for non-universal variational quantum circuits using the principal orbit-type theorem, deriving necessary and sufficient dimensional conditions for successful training that are validated by numerical simulations showing improved convergence when these criteria are met.

Vishal S. Ngairangbam, Michael Spannowsky2026-09-24

⚛️ quantum physics

Soft decoding for quantum LDPC codes with experimental validation

This paper introduces a soft beam search decoder for quantum LDPC codes that leverages internal data for confidence scoring, demonstrating through simulations and experimental re-analysis that it significantly suppresses logical errors and extends qubit lifetimes to beyond-breakeven regimes with minimal shot rejection.

Arda Aydin, Edwin Tham, Nicolas Delfosse, Min Ye2026-09-24

🔢 mathematics

Emergent Prethermal Symmetries for Scalable Hamiltonian Learning

This paper introduces a scalable Hamiltonian learning protocol for geometrically local many-body systems that achieves Heisenberg-limited precision using only static single-qubit fields to generate emergent prethermal symmetries, thereby eliminating the need for trusted multi-qubit operations or rapid control pulses.

Myeongjin Shin, Junseo Lee, Iman Marvian, Yu Tong2026-09-24

⚛️ quantum physics

Measurement-Only Dynamical Phase Transitions in Spin-1 Chains

This paper demonstrates that forced local projections in an interacting spin-1 chain starting from an AKLT state drive the system into three distinct dynamical phases—trivial product, dimerized valence-bond-solid, and interwoven Haldane chains—via continuous transitions characterized by nonlocal string order and entanglement scaling.

Kemal Aziz, Haining Pan, J. H. Pixley2026-09-24

🔬 mesoscale physics

Charge and spin qubits in interacting quantum dots coupled to Rashba-active leads

This paper presents a unified study of charge and spin qubits in a single interacting quantum dot coupled to Rashba-active leads, utilizing both Lindblad master equations and matrix-product-state simulations to demonstrate how energetic leakage structures and spin-orbit-dependent hybridization govern relaxation, decoherence, and magnetic anisotropy in both equilibrium and dynamical regimes.

Grazia Di Bello, Fabrizio Pavan, Mattia Trama, Roberta Citro, Giulio De Filippis, Carmine Antonio Perroni2026-09-24

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