Quantum

Quantum has published 1960 Papers in 10 Volumes, as well as 86 Views in Quantum Views.

Policy Update: New editorial onboarding and review procedures

Dear Quantum Community, We wanted to provide an update and announce a new attempt to improve the quality of peer review procedures in Quantum. TL;DR: from now on, instead of …

Paper

Self-Testing Graph States Permitting Bounded Classical Communication

Uta Isabella Meyer, Ivan Šupić, Frédéric Grosshans, and Damian Markham,

Quantum 10, 1961 (2026).

Self-testing identifies quantum states and correlations that exhibit nonlocality, distinguishing them, up to local transformations, from other quantum states. Due to their strong nonlocality…

Paper

Resource-Dependent Complexity of Quantum Channels

Roy Araiza, Yidong Chen, Marius Junge, and Peixue Wu,

Quantum 10, 1960 (2026).

We introduce a new framework for quantifying the complexity of quantum channels, grounded in a suitably chosen resource set. This class of convex functions is designed to analyze the complex…

Paper

A decompositional framework for process theories in spacetime

Matthias Salzger and John H. Selby,

Quantum 10, 1959 (2026).

There has been a recent surge of interest within the field of quantum foundations regarding incorporating ideas from general relativity and quantum gravity. However, many quantum information…

Paper

Asymptotic robustness of entanglement in noisy quantum networks and graph connectivity

Fernando Lledó, Carlos Palazuelos, and Julio I. de Vicente,

Quantum 9, 1958 (2025).

Quantum networks are promising venues for quantum information processing. This motivates the study of the entanglement properties of the particular multipartite quantum states that underpin…

Paper

Isolated zero mode in a quantum computer from a duality twist

Sutapa Samanta, Derek S. Wang, Armin Rahmani, and Aditi Mitra,

Quantum 9, 1957 (2025).

Investigating the interplay of dualities, generalized symmetries, and topological defects beyond theoretical models is an important challenge in condensed matter physics and quantum material…

Paper

Quantum Complexity and Chaos in Many-Qudit Doped Clifford Circuits

Beatrice Magni and Xhek Turkeshi,

Quantum 9, 1956 (2025).

We investigate the emergence of quantum complexity and chaos in doped Clifford circuits acting on qudits of odd prime dimension $d$. Using doped Clifford Weingarten calculus and a replica tens…

Paper

Quantum Algorithm for Estimating Betti Numbers Using Cohomology Approach

Nhat A. Nghiem, Xianfeng David Gu, and Tzu-Chieh Wei,

Quantum 9, 1955 (2025).

Topological data analysis has emerged as a powerful tool for analyzing large-scale data. An abstract simplicial complex, in principle, can be built from data points, and by using tools from…

Paper

Double-bracket algorithm for quantum signal processing without post-selection

Yudai Suzuki, Bi Hong Tiang, Jeongrak Son, Nelly H. Y. Ng, Zoe Holmes, and Marek Gluza,

Quantum 9, 1954 (2025).

Quantum Signal Processing (QSP), a framework for implementing matrix-valued polynomials, is a fundamental primitive in various quantum algorithms. Despite its versatility, a potentially unde…

Paper

Ladder Operator Block-Encoding

William A. Simon, Carter M. Gustin, Kamil Serafin, Alexis Ralli, Gary R. Goldstein, and Peter J. Love,

Quantum 9, 1953 (2025).

We describe and analyze LOBE (Ladder Operator Block-Encoding), a framework for block-encoding ladder operators that act upon fermionic and bosonic modes. In this framework, we achieve effici…

Paper

Multi-time quantum process tomography on a superconducting qubit

Christina Giarmatzi, Tyler Jones, Alexei Gilchrist, Prasanna Pakkiam, Arkady Fedorov, and Fabio Costa,

Quantum 9, 1952 (2025).

Current quantum technologies are at the cusp of becoming useful, but still face formidable obstacles such as noise. Noise severely limits the ability to scale quantum devices to the point th…

Paper

Quantized Markov Chain Couplings that Prepare Qsamples

Kristan Temme and Pawel Wocjan,

Quantum 9, 1951 (2025).

We present a novel approach to quantizing Markov chains. The approach is based on the Markov chain coupling method, which is frequently used to prove fast mixing. Given a particular coupling…

Paper

Performance Analysis of Quantum CSS Error-Correcting Codes via MacWilliams Identities

Diego Forlivesi, Lorenzo Valentini, and Marco Chiani,

Quantum 9, 1950 (2025).

We analyze the performance of quantum stabilizer codes, one of the most important classes for practical implementations, on both symmetric and asymmetric quantum channels. To this aim, we fi…

Paper

Probes of Full Eigenstate Thermalization in Ergodicity-Breaking Quantum Circuits

Gabriel O. Alves, Felix Fritzsch, and Pieter W. Claeys,

Quantum 9, 1949 (2025).

The eigenstate thermalization hypothesis (ETH) is the leading interpretation in our current understanding of quantum thermalization. Recent results uncovered strong connections between quant…

Paper

Quantum Communication Networks Enhanced by Distributed Quantum Memories

Xiangyi Meng, Nicolò Lo Piparo, Kae Nemoto, and István A. Kovács,

Quantum 9, 1948 (2025).

Building large-scale quantum communication networks has its unique challenges. Here, we demonstrate that a network-wide synergistic usage of quantum memories distributed in a quantum communi…

Paper

Entangled Subspaces through Algebraic Geometry

Masoud Gharahi and Stefano Mancini,

Quantum 9, 1947 (2025).

We propose an algebraic geometry-inspired approach for constructing entangled subspaces within the Hilbert space of a multipartite quantum system. Specifically, our method employs a modified…

Paper

GPU-accelerated Effective Hamiltonian Calculator

Abhishek Chakraborty, Taylor L. Patti, Brucek Khailany, Andrew N. Jordan, and Anima Anandkumar,

Quantum 9, 1946 (2025).

Effective Hamiltonian calculations for large quantum systems can be both analytically intractable and numerically expensive using standard techniques. In this manuscript, we present numerica…