Quantum

Quantum has published 2161 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

Fast quantum measurement tomography with optimal error bounds

Leonardo Zambrano, Sergi Ramos-Calderer, and Richard Kueng,

Quantum 10, 2162 (2026).

We present a two-step protocol for quantum measurement tomography that is light on classical co-processing cost and still achieves optimal sample complexity. Given measurement data from a kn…

Paper

MPC in the Quantum Head (or: Superposition-Secure (Quantum) Zero-Knowledge)

Andrea Coladangelo, Ruta Jawale, Dakshita Khurana, Giulio Malavolta, and Hendrik Waldner,

Quantum 10, 2161 (2026).

The MPC-in-the-head technique (Ishai et al., STOC 2007) is a celebrated method to build zero-knowledge protocols with desirable theoretical properties and high practical efficiency. This tec…

Paper

Geometric speed limit of state preparation and curved control spaces

Maximilian Goll and Robert H. Jonsson,

Quantum 10, 2160 (2026).

The preparation of quantum many-body systems faces the difficulty that in a realistic scenario only few control parameters of the system may be accessible. In this context, an interesting co…

Paper

From Superradiance to Superabsorption: An Exact Treatment of Non-Markovian Cooperative Radiation

Ignacio González and Ángel Rivas,

Quantum 10, 2159 (2026).

We investigate the emergence of cooperative radiation phenomena in ensembles of two-level atoms coupled to a lossy resonant cavity beyond the Markovian and mean-field approximations. By deri…

Paper

Near-Optimal Parameter Tuning of Level-1 QAOA for Ising Models

V Vijendran, Dax Enshan Koh, Eunok Bae, Hyukjoon Kwon, Ping Koy Lam, and Syed M Assad,

Quantum 10, 2158 (2026).

The Quantum Approximate Optimisation Algorithm (QAOA) tackles combinatorial optimisation problems by encoding their solutions into the ground state of an Ising Hamiltonian prepared by a $p$-le…

Paper

Towards Unconditional Uncloneable Encryption

Pierre Botteron, Anne Broadbent, Eric Culf, Ion Nechita, Clément Pellegrini, and Denis Rochette,

Quantum 10, 2157 (2026).

Uncloneable encryption is a cryptographic primitive which encrypts a classical message into a quantum ciphertext, such that two quantum adversaries are limited in their capacity of being abl…

Paper

Enlarging the GKP stabilizer group for enhanced noise protection

Jonathan Pelletier and Baptiste Royer,

Quantum 10, 2156 (2026).

Encoding a qubit in a larger Hilbert space of an oscillator is an efficient way to protect its quantum information against decoherence. Promising examples of such bosonic encodings are the G…

Paper

Resourcefulness of non-classical continuous-variable quantum gates

Massimo Frigerio, Antoine Debray, Nicolas Treps, and Mattia Walschaers,

Quantum 10, 2155 (2026).

In continuous-variable quantum computation, identifying key elements that enable a quantum computational advantage is a long-standing issue. Starting from the standard results on the necessi…

Paper

Quantum Alternating Direction Method of Multipliers for Semidefinite Programming

Hantao Nie, Dong An, and Zaiwen Wen,

Quantum 10, 2154 (2026).

Semidefinite programming (SDP) is a fundamental convex optimization problem with wide-ranging applications. However, solving large-scale instances remains computationally challenging due to…

Paper

Exploring Imaginary Coordinates: Disparity in the Shape of Quantum State Space in Even and Odd Dimensions

Simon Morelli, Santiago Llorens, and Jens Siewert,

Quantum 10, 2153 (2026).

The state of a finite-dimensional quantum system is described by a density matrix that can be decomposed into a real diagonal, a real off-diagonal and and an imaginary off-diagonal part. The…

Paper

A complexity theory for non-local quantum computation

Andreas Bluhm, Simon Höfer, Alex May, Mikka Stasiuk, Philip Verduyn Lunel, and Henry Yuen,

Quantum 10, 2152 (2026).

Non-local quantum computation (NLQC) replaces a local interaction between two systems with a single round of communication and shared entanglement. Despite many partial results, it is known…

Paper

Learning thermodynamic master equations for open quantum systems

Peter Sentz, Stanley Nicholson, Yujin Cho, Sohail Reddy, Brendan Keith, and Stefanie Günther,

Quantum 10, 2151 (2026).

The characterization of Hamiltonians and other components of open quantum dynamical systems plays a crucial role in quantum computing and other applications. Scientific machine learning tech…

Paper

Entanglement in the Dicke subspace

Aabhas Gulati, Ion Nechita, and Clément Pellegrini,

Quantum 10, 2150 (2026).

We provide a complete mathematical theory for the entanglement of mixtures of Dicke states. These quantum states form an important subclass of bosonic states arising in the study of indistin…

Paper

Machine Learning Decoding of Circuit-Level Noise for Bivariate Bicycle Codes

John Blue, Harshil Avlani, Zhiyang He, Liu Ziyin, and Isaac L. Chuang,

Quantum 10, 2149 (2026).

Fault-tolerant quantum computers will depend crucially on the performance of the classical decoding algorithm which takes in the results of measurements and outputs corrections to the errors…

Paper

Multi-product Zeno effect achieving higher order convergence rates

Tim Möbus,

Quantum 10, 2148 (2026).

The quantum Zeno effect is a fundamental mechanism for implementing the effective dynamics of projected Hamiltonian and Lindbladian systems. It approximates the target projected evolution by…

Paper

On the significance of Wigner’s Friend in contexts beyond quantum foundations

Caroline L. Jones and Markus P. Mueller,

Quantum 10, 2147 (2026).

There has been a surge of recent interest in the Wigner's Friend paradox, sparking several novel thought experiments and no-go theorems. The main narrative has been that Wigner's Friend high…