Quantum

Huan-Yu Liu, Xiaoshui Lin, Zhao-Yun Chen, Cheng Xue, Tai-Ping Sun, Qing-Song Li, Xi-Ning Zhuang, Yun-Jie Wang, Yu-Chun Wu, Ming Gong, and Guo-Ping Guo,

Quantum 9, 1765 (2025).

The rapid development of quantum computers has enabled demonstrations of quantum advantages on various tasks. However, real quantum systems are always dissipative due to their inevitable int…

Paper

Explicit block encodings of boundary value problems for many-body elliptic operators

Tyler Kharazi, Ahmad M. Alkadri, Jin-Peng Liu, Kranthi K. Mandadapu, and K. Birgitta Whaley,

Quantum 9, 1764 (2025).

Simulation of physical systems is one of the most promising use cases of future digital quantum computers. In this work we systematically analyze the quantum circuit complexities of block en…

Paper

Cyclic measurements and simplified quantum state tomography

Victor Gonzalez Avella, Jakub Czartowski, Dardo Goyeneche, and Karol Życzkowski,

Quantum 9, 1763 (2025).

Tomographic reconstruction of quantum states plays a fundamental role in benchmarking quantum systems and accessing information encoded in quantum-mechanical systems. Among the informational…

Paper

Building a fusion-based quantum computer using teleported gates

Ashot Avanesov, Alexander Shurinov, Ivan Dyakonov, and Stanislav Straupe,

Quantum 9, 1762 (2025).

We adopt a method of the quantum gate teleportation for converting circuit-based quantum computation primitives into fusion networks. By using the presented scheme for the CNOT gate we const…

Paper

Quantum DeepONet: Neural operators accelerated by quantum computing

Pengpeng Xiao, Muqing Zheng, Anran Jiao, Xiu Yang, and Lu Lu,

Quantum 9, 1761 (2025).

In the realm of computational science and engineering, constructing models that reflect real-world phenomena requires solving partial differential equations (PDEs) with different conditions.…

Paper

How to avoid (apparent) signaling in Bell tests

Massimiliano Smania, Matthias Kleinmann, Adán Cabello, and Mohamed Bourennane,

Quantum 9, 1760 (2025).

Bell tests have become a powerful tool for quantifying security, randomness, entanglement, and many other properties, as well as for investigating fundamental physical limits. In all these c…

Paper

Pseudorandom unitaries are neither real nor sparse nor noise-robust

Tobias Haug, Kishor Bharti, and Dax Enshan Koh,

Quantum 9, 1759 (2025).

Pseudorandom quantum states (PRSs) and pseudorandom unitaries (PRUs) possess the dual nature of being efficiently constructible while appearing completely random to any efficient quantum alg…

Paper

Reinforcement Learning Based Quantum Circuit Optimization via ZX-Calculus

Jordi Riu, Jan Nogué, Gerard Vilaplana, Artur Garcia-Saez, and Marta P. Estarellas,

Quantum 9, 1758 (2025).

We propose a novel Reinforcement Learning (RL) method for optimizing quantum circuits using graph-theoretic simplification rules of ZX-diagrams. The agent, trained using the Proximal Policy…

Paper

Full Characterization of the Depth Overhead for Quantum Circuit Compilation with Arbitrary Qubit Connectivity Constraint

Pei Yuan and Shengyu Zhang,

Quantum 9, 1757 (2025).

In some physical implementations of quantum computers, 2-qubit operations can be applied only on certain pairs of qubits. Compilation of a quantum circuit into one compliant to such qubit co…

Paper

Renormalisation of Quantum Cellular Automata

Lorenzo Siro Trezzini, Alessandro Bisio, and Paolo Perinotti,

Quantum 9, 1756 (2025).

We study a coarse-graining procedure for quantum cellular automata on hypercubic lattices that consists in grouping neighboring cells into tiles and selecting a subspace within each tile. Th…