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.

⚛️ high-energy theory

Quantum Entanglement of Bethe States

This paper investigates the bipartite entanglement entropy of Bethe states across various integrable spin chains, systematically identifying the specific solutions that minimize and maximize entanglement, revealing that while the ground state often minimizes entropy in the XXX $_{1/2}$ model, this correspondence breaks down in higher-spin and non-compact chains, and further developing an optimization algorithm to explore maximum entanglement for off-shell states.

Yu Hao, Yunfeng Jiang, Bi-Quan Yang, De-liang Zhong2026-06-15

⚛️ quantum physics

Fourier analysis of quantum neural network with non-linear data embedding

This paper establishes a rigorous Fourier analysis framework for Variational Quantum Circuits with non-linear amplitude data embedding, deriving theoretical guarantees on expressivity and trainability in both noiseless and noisy environments while validating these findings through simulations.

Haiyue Kang, Martin Sevior, Muhammad Usman2026-06-15

🔬 mesoscale physics

Real-time pseudo entropy and modular-Hamiltonian correlations

This paper investigates the short-time behavior of real-time pseudo entropy, demonstrating that its initial imaginary and real responses are fundamentally governed by the symmetrized covariance and commutator, respectively, between the physical Hamiltonian and the modular Hamiltonian, thereby revealing pseudo entropy as a time-oriented modular response rather than a mere branch artifact.

Tatsuhiro Misumi2026-06-15

⚛️ quantum physics

Quantum codes and optimal pure quantum $(r,\delta)$ -LRCs via the MP construction

This paper establishes a unified $\tau$ -monomial decomposition theorem for invertible self-adjoint matrices over finite fields of arbitrary characteristic to construct new infinite families of quantum codes and optimal pure quantum $(r,\delta)$ -LRCs, including 222 record-breaking codes and 30 instances that are simultaneously optimal LRCs and best-known quantum codes.

Meng Cao, Kun Zhou2026-06-15

⚛️ quantum physics

Certification of the genuine resolution of photon number resolving detectors

This paper introduces an operational framework and a scalable protocol based on coherent state probes to certify the genuine photon-number resolution of detectors, which is demonstrated by achieving four-outcome resolution on a 28-pixel superconducting nanowire single-photon detector.

Jef Pauwels, Towsif Taher, Roope Uola, Boris Korzh, Nicolas Brunner, Pavel Sekatski2026-06-15

⚛️ quantum physics

Quantum sensing through bosonic-fermionic Bell-state transitions in two-photon interference

This paper demonstrates a robust quantum sensing scheme that utilizes continuous transitions between bosonic and fermionic Bell states in two-photon interference to measure thermo-dispersive birefringence with high resolution, overcoming the limitations of conventional Hong-Ou-Mandel sensing by maintaining a fixed phase-modulation linewidth independent of photon bandwidth.

Chahat Kaushik, Vimlesh Kumar, G. K. Samanta2026-06-15

⚛️ quantum physics

Jones-matrix analysis of phase accumulation in a linear-optical multi-pass interferometer

This paper employs a rigorous Jones-matrix formalism and classical-wave experiments to demonstrate that the superresolution observed in a linear-optical multi-pass interferometer arises from geometric polarization-state rotation on the Poincaré sphere, while clarifying that the claimed supersensitivity requires careful re-evaluation of the Fisher information scaling.

Byoung S. Ham2026-06-15

⚛️ quantum physics

Dealing with locality in QAOA

This paper proposes a transport-augmented QAOA that overcomes the locality bottleneck in shallow-depth circuits for high-diameter MaxCut instances by adding optimized shortcut couplings to collapse the interaction-graph diameter, thereby achieving near-optimal, size-invariant performance significantly outperforming existing methods like ma-QAOA.

Mithilesh Kumar, Yusuf Tahir2026-06-15

⚛️ quantum physics

Sensitivity of polaron-molecule observables to MDR/GUP-like ultraviolet deformations at low energies via quantum computing

This paper demonstrates that impurity many-body observables in a polaron-molecule system exhibit amplified sensitivity to ultraviolet deformations resembling generalized uncertainty principles or modified dispersion relations, enabling the detection of low-energy quantum-gravity effects through spectral and Ramsey measurements validated on a superconducting quantum processor.

Ezequiel Valero, Hugo Catala, Victor Ilisie, Germán Rodrigo2026-06-15

💰 quantitative finance

Quantum Horizon: An evaluation of quantum computing as a threat to Bitcoin and Ethereum

The paper argues that while quantum computing poses a significant but manageable threat to Bitcoin and Ethereum primarily through Shor's algorithm breaking digital signatures rather than mining, the critical challenge lies in timely governance-led migration to post-quantum cryptography rather than the technology itself, with a projected 60% probability of a cryptographically relevant quantum computer emerging by 2050.

Iosif M. Gershteyn, Jacob A. Alber2026-06-15

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quant-ph

Quantum Entanglement of Bethe States

Fourier analysis of quantum neural network with non-linear data embedding

Real-time pseudo entropy and modular-Hamiltonian correlations

Quantum codes and optimal pure quantum (r,δ)(r,\delta)(r,δ)-LRCs via the MP construction

Certification of the genuine resolution of photon number resolving detectors

Quantum sensing through bosonic-fermionic Bell-state transitions in two-photon interference

Jones-matrix analysis of phase accumulation in a linear-optical multi-pass interferometer

Dealing with locality in QAOA

Sensitivity of polaron-molecule observables to MDR/GUP-like ultraviolet deformations at low energies via quantum computing

Quantum Horizon: An evaluation of quantum computing as a threat to Bitcoin and Ethereum

Quantum codes and optimal pure quantum $(r,\delta)$ -LRCs via the MP construction