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.

🔬 condensed matter

Constructing Bulk Topological Orders via Layered Gauging

This paper proposes a physically intuitive and versatile "layered gauging" construction that systematically generates $(k+1)$ -dimensional topological orders (including liquid and fracton phases) by stacking $k$ -dimensional quantum systems and sequentially gauging diagonal symmetries between adjacent layers, successfully demonstrating its applicability across diverse symmetry types such as conventional, higher-form, subsystem, anomalous, nonabelian, and noninvertible symmetries.

Shang Liu2026-05-01

⚛️ quantum physics

Demonstration of Exponential Quantum Speedup with Constant-Depth Compiled Circuits for Simon's Problem

This paper demonstrates an exponential quantum speedup for a restricted version of Simon's problem on current IBM superconducting processors by employing a hardware-aware compilation strategy that reduces circuit depth to a constant, thereby achieving algorithmic advantage without error suppression in the NISQ regime.

Phattharaporn Singkanipa, Victor Kasatkin, Daniel A. Lidar2026-05-01

⚛️ quantum physics

Galilean boost invariance does not survive the trace: symmetry breaking in open quantum systems

This paper demonstrates that tracing out a Galilean-invariant Caldeira-Leggett environment inevitably breaks Galilean boost covariance in the reduced dynamics of open quantum systems due to dissipative terms linked to the fluctuation-dissipation theorem, while spatial translations and rotations remain intact.

Leonardo F. Calderón, Esteban Marulanda, Santiago Morales, Leonardo A. Pachón2026-05-01

⚛️ quantum physics

Finite Imaginary-Time Evolution for Polynomial Unconstrained Binary Optimization

This paper introduces Finite Imaginary-Time Evolution (FinITE), a non-unitary quantum algorithm utilizing the linear-combination-of-unitaries framework to solve polynomial unconstrained binary optimization problems with exact ground-state fidelity guarantees and fixed-point amplitude amplification, while avoiding the need for quadratization.

Jaehee Kim, Juhyeon Kim, Gwonhak Lee, Kyunghyun Baek, Daniel K. Park, Jeongho Bang, Joonsuk Huh2026-05-01

⚛️ quantum physics

Experimental detection of entanglement in multimode Gaussian states from high-order intensity correlation moments

This paper experimentally demonstrates the detection of entanglement in two- and three-mode Gaussian states using high-order intensity correlation moments measured by a spatially multiplexed superconducting nanowire detector, a method that characterizes quantum states without requiring a coherent local oscillator.

Ze-Shan He, Yukuan Zhao, Hao-Shu Tian, Kai Sun, Xiao-Ye Xu, Chuan-Feng Li, Guang-Can Guo2026-05-01

⚛️ quantum physics

Parametrically Driven iSWAP Gate Using a Capacitively Shunted Double-Transmon Coupler at the Zero-Flux Sweet Spot

This paper experimentally demonstrates a high-fidelity (99.92%), fast (112 ns) parametrically driven iSWAP gate between fixed-frequency transmon qubits coupled by a capacitively shunted double-transmon coupler at the zero-flux sweet spot, successfully avoiding the pulse distortion and decoherence issues associated with large-amplitude flux pulses required for traditional CZ gates.

Shinichi Inoue, Rui Li, Kentaro Kubo, Yinghao Ho, Yasunobu Nakamura, Hayato Goto2026-05-01

🔬 optics

OAM-mode sorting with a wavefront twister

The paper proposes a scalable OAM mode sorting scheme using a novel "wavefront twister" element that, unlike conventional rotators, twists the wavefront linearly with radial position to map distinct OAM modes to separate annuli at a lens's focal plane with negligible overlap.

Suman Karan, Swati Chaudhary, Harshwardhan Wanare, Anand Kumar Jha2026-05-01

⚛️ quantum physics

Explicit Quantum Search Algorithm for the Densest k-Subgraph Problem

This paper proposes two quantum approaches, including an explicit gate-based oracle circuit utilizing Dicke states and the Quantum Fourier Transform, to solve the NP-hard Densest k-Subgraph problem with a demonstrated quadratic speedup over classical brute-force search.

Yu. A. Biriukov, R. D. Morozov, I. V. Dyakonov, S. S. Straupe2026-05-01

⚛️ quantum physics

High-Girth Regular Quantum LDPC Codes from Square-Base Hypergraph Products via CPM Lifts

This paper introduces a class of square-base hypergraph product codes that achieve high girth and regularity, demonstrating through a specific CPM-lifted instance that such codes can exhibit exceptional error-correction performance under depolarizing noise.

Koki Okada, Kenta Kasai2026-05-01

⚛️ quantum physics

Compressed Sensing for Efficient Fidelity Estimation of GHZ States

This paper proposes a compressed sensing protocol that leverages the inherent sparsity of Greenberger-Horne-Zeilinger (GHZ) states to drastically reduce measurement overhead for fidelity estimation, demonstrating its high accuracy and robustness in noisy environments through simulations and experiments on Quantinuum's trapped-ion hardware.

Farrokh Labib, David Nicholaeff, Vincent Russo, William J. Zeng2026-05-01

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