⚛️ Category

quant-ph

6384 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

Scaling of Quantum Resources for Simulating a Long-Range System

This paper demonstrates that for simulating a long-range extended Ising model using VQE, structure-aware ansatze incorporating longer-range entangling blocks significantly reduce the required circuit depth compared to nearest-neighbor approaches, with gate scaling transitioning from linear to quadratic depending on the interaction range and phase, while establishing pairwise logarithmic negativity as a more reliable convergence metric than energy fidelity alone.

Tanya Keshari, Debasis Sadhukhan2026-04-21
⚛️ quantum physics

Physics-Informed Neural Networks for Maximizing Quantum Fisher Information in Time-Dependent Many-Body Systems

This paper presents a physics-informed neural network framework that integrates variational learning with Magnus expansion to optimize control protocols and maximize Quantum Fisher Information in time-dependent many-body systems, demonstrating superior performance over reference solutions for up to six qubits.

Antonio Ferrer-Sánchez, Yolanda Vives-Gilabert, Yue Ban, Xi Chen, José D. Martín-Guerrero2026-04-21
⚛️ quantum physics

Hamiltonian dynamics from pure dissipation

This paper demonstrates that internal Hamiltonian dynamics can be effectively simulated using only external pure dissipation (Lindbladians without a coherent Hamiltonian term), establishing that bounded-norm dissipative generators can approximate unitary evolution with optimal time scaling and revealing significant implications for quantum complexity, state freezing, and simulation efficiency.

Zhong-Xia Shang, Daniel Stilck França2026-04-21
⚛️ quantum physics

From barren plateaus through fertile valleys: Conic extensions of parameterised quantum circuits

This paper proposes a novel approach using non-unitary conic extensions of parameterised quantum circuits, which leverage mid-circuit measurements and ancilla systems to facilitate jumps out of barren plateaus, thereby significantly improving the optimization performance and solution sampling probabilities of algorithms like QAOA.

Lennart Binkowski, Gereon Koßmann, Tobias J. Osborne, René Schwonnek, Timo Ziegler2026-04-20
⚛️ quantum physics

Quantum communication networks with defects in silicon carbide

This paper reviews silicon carbide defects as a promising platform for quantum communication nodes, particularly those operating in the telecom range, and models a memory-enhanced protocol to identify the key parameters and steps needed to outperform direct point-to-point links in large-scale networks.

Philipp Sohr, Philipp Koller, Sebastian Ecker, Matthias Fink, Thomas Scheidl, Rupert Ursin, Muhammad Junaid Arshad, Cris (…)2026-04-20
🔢 mathematics

Efficient thermalization and universal quantum computing with quantum Gibbs samplers

This paper demonstrates that a specific family of efficiently implementable quasi-local dissipative evolutions can universally prepare high-temperature Gibbs states and their purifications in polynomial time, while also achieving computational universality equivalent to polynomial-time quantum computing in the low-temperature regime.

Cambyse Rouzé, Daniel Stilck França, Álvaro M. Alhambra2026-04-20
🔢 mathematics

Optimal Coherent Quantum Phase Estimation via Tapering

This paper introduces the tapered quantum phase estimation (tQPE) algorithm, which leverages classical signal processing window functions to achieve asymptotically optimal query complexity for coherent phase estimation without the high resource overhead of the standard coherent median technique, while also providing an efficiently preparable state that incurs at most a factor-of-two increase in error probability.

Dhrumil Patel, Shi Jie Samuel Tan, Yigit Subasi, Andrew T. Sornborger2026-04-20
⚛️ quantum physics

Elastic scattering of twisted electrons by CO2_2 molecules at high energies

This paper theoretically investigates the high-energy elastic scattering of twisted (Bessel) electron beams by CO2_2 molecules, utilizing coupled cluster and density functional theory for structural optimization and the first Born approximation to compute orientation- and impact-parameter-averaged differential and total cross-sections for topological charges ranging from ml=1m_l=1 to $20$.

Raul Sheldon Pinto, Rakesh Choubisa2026-04-20