Quantum

Quantum has published 2194 Papers in 10 Volumes, as well as 87 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

Simple logical quantum computation with concatenated symplectic double codes

Noah Berthusen and Elijah Durso-Sabina,

Quantum 10, 2195 (2026).

There have been significant recent advances in constructing theoretical and practical quantum error correcting codes that function well as quantum memories; however, performing fault-toleran…

Paper

Quantifying mixed-state entanglement via partial transpose and realignment moments

Poetri Sonya Tarabunga and Tobias Haug,

Quantum 10, 2194 (2026).

Entanglement plays a crucial role in quantum information science and many-body physics, yet quantifying it in mixed quantum many-body systems has remained a notoriously difficult problem. He…

Paper

Quantum phase estimation with optimal confidence interval using three control qubits

Kaur Kristjuhan and Dominic W. Berry,

Quantum 10, 2193 (2026).

Quantum phase estimation is an important routine in many quantum algorithms, particularly for estimating the ground state energy in quantum chemistry simulations. This estimation involves ap…

Paper

Measurement incompatibility in Bayesian multiparameter quantum estimation

Francesco Albarelli, Dominic Branford, and Jesús Rubio,

Quantum 10, 2192 (2026).

We present a comprehensive and pedagogical formulation of Bayesian multiparameter quantum estimation. Within this framework, we analyse the role of measurement incompatibility and establish…

Paper

Catalytic $z$-rotations in constant $T$-depth

Isaac H. Kim,

Quantum 10, 2191 (2026).

We show that the $T$-depth of any single-qubit $z$-rotation can be reduced to $3$ if a certain catalyst state is available. To achieve an $\epsilon$-approximation, it suffices to have a catalyst sta…

Paper

Robust topological quantum state transfer with long-range interactions in Rydberg arrays

Siri Raupach, Beatriz Olmos, and Mathias B. M. Svendsen,

Quantum 10, 2190 (2026).

We develop a theoretical framework for fast, robust and high-fidelity topological quantum state transfer in one-dimensional systems with long-range couplings, motivated by chains of Rydberg…

Paper

Efficient Graph State Generation in Linear Optics

Seungbeom Chin and William John Munro,

Quantum 10, 2189 (2026).

Graph states are central resources for quantum information processing, supporting applications in computation, communication, and error correction. In photonic systems, they are typically as…

Paper

Unconditional Quantum Advantage for Sampling with Shallow Circuits

Adam Bene Watts and Natalie Parham,

Quantum 10, 2188 (2026).

Recent work by Bravyi, Gosset, and Koenig showed that there exists a search problem that a constant-depth quantum circuit can solve, but that any constant-depth classical circuit with bounde…

Paper

Quantum Resource Comparison for Two Leading Surface Code Lattice Surgery Approaches

Tyler LeBlond and Ryan S. Bennink,

Quantum 10, 2187 (2026).

Hamiltonian simulation is one of the most promising candidates for the demonstration of quantum advantage within the next ten years, and several studies have proposed end-to-end resource est…

Paper

Disorder-Induced Entanglement Phase Transitions in Non-Hermitian Systems with Skin Effects

Kai Li, Ze-Chuan Liu, and Yong Xu,

Quantum 10, 2186 (2026).

Non-Hermitian dynamics is ubiquitous in various physical systems. While recent study shows that such a dynamics leads to an area-law scaling of the entanglement entropy due to the non-Hermit…

Paper

Promise of Graph Sparsification and Decomposition for Noise Reduction in QAOA: Analysis for Trapped-Ion Compilations

Jai Moondra, Phillip C. Lotshaw, Greg Mohler, and Swati Gupta,

Quantum 10, 2185 (2026).

We develop new approximate compilation schemes that significantly reduce the expense of compiling the Quantum Approximate Optimization Algorithm (QAOA) for solving the Max-Cut problem. Our m…

Paper

Detection of a Rényi Index Dependent Transition in Entanglement Entropy Scaling

Hatem Barghathi and Adrian Del Maestro,

Quantum 10, 2184 (2026).

The scaling of entanglement with subsystem size encodes key information about phases and criticality, but the von Neumann entropy is costly to access in experiments and simulations, often re…

Perspective

Charting separability and entanglement of diagonal Dicke states

Guillem Müller-Rigat,

Quantum Views 10, 87 (2026).

Dicke states are multipartite quantum states first introduced in [1] to describe the collective excitations of $N$ two-level atoms coupled to a single-mode electromagnetic field. They span a s…

Paper

Entanglement growth in the dark intervals of a locally monitored free-fermion chain

Giovanni Di Fresco, Youenn Le Gal, Davide Valenti, Marco Schiró, and Angelo Carollo,

Quantum 10, 2183 (2026).

We consider a free fermionic chain with monitoring of the particle density on a single site of the chain and study the entanglement dynamics of quantum jump trajectories. We show that the en…

Paper

On the quantum computational complexity of classical linear dynamics with geometrically local interactions: Dequantization and universality

Kazuki Sakamoto and Keisuke Fujii,

Quantum 10, 2182 (2026).

The simulation of large-scale classical systems in exponentially small space on quantum computers has gained attention. The prior work demonstrated that a quantum algorithm offers an exponen…

Paper

Entanglement-assisted Quasi-cyclic Quantum Low-density Parity-check Codes over Qubits

Pavan Kumar, Abhi Kumar Sharma, Karthik Bharadwaj, and Shayan Srinivasa Garani,

Quantum 10, 2181 (2026).

We construct several families of entanglement-assisted quasi-cyclic quantum LDPC (EA-QC-QLDPC) codes via structured tilings of permutation matrices. The entanglement-unassisted portion of th…