Quantum – the open journal for quantum science

Quantum has published 2058 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

Computing quantum magic of state vectors

Piotr Sierant, Jofre Vallès-Muns, and Artur Garcia-Saez,

Quantum 10, 2059 (2026).

Non-stabilizerness, also known as “magic,'' quantifies how far a quantum state departs from the stabilizer set. It is a central resource behind quantum advantage and a useful probe of the co…

Paper

A streamlined quantum algorithm for topological data analysis with exponentially fewer qubits

Sam McArdle, András Gilyén,, and Mario Berta,

Quantum 10, 2058 (2026).

Topological invariants of a dataset, such as the number of holes that survive from one length scale to another (persistent Betti numbers) can be used to analyze and classify data in machine…

Paper

A Remarkable Application of Zassenhaus Formula to Strongly Correlated Electron Systems

Louis Jourdan and Patrick Cassam-Chenaï,

Quantum 10, 2057 (2026).

We show that the Zassenhaus decomposition for the exponential of the sum of two non-commuting operators, simplifies drastically when these operators satisfy a simple condition, called the no…

Paper

Recursive algorithm for constructing antisymmetric fermionic states in first quantization mapping

E. Rule, I. A. Chernyshev, I. Stetcu, J. Carlson, and R. Weiss,

Quantum 10, 2056 (2026).

We devise a deterministic quantum algorithm to produce antisymmetric states of single-particle orbitals in the first quantization mapping. Unlike sorting-based antisymmetrization algorithms,…

Paper

Trans-dimensional Hamiltonian model selection and parameter estimation from sparse, noisy data

Abigail N. Poteshman, Jiwon Yun, Tim H. Taminiau, and Giulia Galli,

Quantum 10, 2055 (2026).

High-throughput characterization often requires estimating parameters and model dimension from experimental data of limited quantity and quality. Such data may result in an ill-posed inverse…

Paper

Power-law distributions in nonequilibrium open quantum systems

Wai-Keong Mok,

Quantum 10, 2054 (2026).

Power-law probability distributions are widely used to model extreme statistical events in complex systems, with applications to a vast array of natural phenomena ranging from earthquakes to…

Paper

Fermionic Averaged Circuit Eigenvalue Sampling

Adrian Chapman and Steven T. Flammia,

Quantum 10, 2053 (2026).

Fermionic averaged circuit eigenvalue sampling (FACES) is a protocol to simultaneously learn the averaged error rates of many fermionic linear optical (FLO) gates simultaneously and self-con…

Paper

An Operational Framework for Nonclassicality in Quantum Communication Networks

Brian Doolittle, Felix Leditzky, and Eric Chitambar,

Quantum 10, 2052 (2026).

Quantum resources, such as entanglement or quantum communication, offer significant communication advantages in information processing. We develop an operational framework for realizing thes…

Paper

Mutually Unbiased Bases in Composite Dimensions – A Review

Daniel McNulty and Stefan Weigert,

Quantum 10, 2051 (2026).

Maximal sets of mutually unbiased bases are useful throughout quantum physics, both in a foundational context and for applications. To date, it remains unknown if complete sets of mutually u…

Paper

Metrologically optimal quantum states under noise

Chao Yin, Victor V. Albert, and Sisi Zhou,

Quantum 10, 2050 (2026).

We propose a class of metrological resource states whose quantum Fisher information scales optimally in both system size and noise rate. In these states, qubits are partitioned into sensing…

Paper

Comparing classical and quantum conditional disclosure of secrets

Uma Girish, Alex May, Leo Orshansky, and Chris Waddell,

Quantum 10, 2049 (2026).

The conditional disclosure of secrets (CDS) setting is among the most basic primitives studied in information-theoretic cryptography. Motivated by a connection to non-local quantum computati…

Paper

Quantum Signal Processing and Quantum Singular Value Transformation on $U(N)$

Xi Lu, Yuan Liu, and Hongwei Lin,

Quantum 10, 2048 (2026).

Quantum signal processing and quantum singular value transformation are powerful tools to implement polynomial transformations of block-encoded matrices on quantum computers, and has achieve…

Paper

The geometry of the Hermitian matrix space and the Schrieffer–Wolff transformation

Gergo Pinter, Gyorgy Frank, Daniel Varjas, and Andras Palyi,

Quantum 10, 2047 (2026).

In quantum mechanics, the Schrieffer–Wolff (SW) transformation (also called quasi-degenerate perturbation theory) is known as an approximative method to reduce the dimension of the Hamiltoni…

Paper

Circuit locality from relativistic locality in scalar field mediated entanglement

Andrea Di Biagio, Richard Howl, Časlav Brukner, Carlo Rovelli, and Marios Christodoulou,

Quantum 10, 2046 (2026).

Locality is a central notion in modern physics, but different disciplines understand it in different ways. Quantum field theory focuses on relativistic locality, based on spacetime regions,…

Paper

Suppressing crosstalk for Rydberg quantum gates

Gina Warttmann, Florian Meinert, Hans Peter Büchler, and Sebastian Weber,

Quantum 10, 2045 (2026).

We present a method to suppress crosstalk from implementing controlled-Z gates via local addressing in neutral atom quantum computers. In these systems, a fraction of the laser light that is…

Paper

Imperfect detectors for adversarial tasks with applications to quantum key distribution

Shlok Nahar, Devashish Tupkary, and Norbert Lütkenhaus,

Quantum 10, 2044 (2026).

Security analyses in quantum key distribution (QKD) and other adversarial quantum tasks often assume perfect device models. However, real-world implementations often deviate from these model…