Quantum

Paper

Sparse quantum state preparation with improved Toffoli cost

Felix Rupprecht and Sabine Wölk,

Quantum 10, 2208 (2026).

The preparation of quantum states is one of the most fundamental tasks in quantum computing, and a key primitive in many quantum algorithms. Of particular interest to areas such as quantum s…

Paper

Streaming Belief Propagation on Mixed-Alphabet Tanner Graphs for Practical Quantum Memory

Kao-Yueh Kuo and Ching-Yi Lai,

Quantum 10, 2207 (2026).

Reliable quantum memory under circuit-level noise requires decoders that can process syndrome information continuously and at a rate comparable to its generation. In practical quantum error…

Paper

Solving the Nonlinear Vlasov Equation on a Quantum Computer

Tamás Vaszary, Animesh Datta, Tom Goffrey, and Brian Appelbe,

Quantum 10, 2206 (2026).

The practical applicability of a recent Carleman-linearization-based quantum algorithm for solving ordinary differential equations (ODEs) with quadratic nonlinearities is investigated for th…

Paper

Breaking the Orthogonality Barrier in Quantum LDPC Codes

Kenta Kasai,

Quantum 10, 2205 (2026).

Classical low-density parity-check (LDPC) codes are a widely deployed and well-established technology, forming the backbone of modern communication and storage systems. It is well known that…

Paper

Faster Quantum Simulation Of Markovian Open Quantum Systems Via Randomisation

I.J. David, I. Sinayskiy, and F. Petruccione,

Quantum 10, 2204 (2026).

When simulating the dynamics of open quantum systems with quantum computers, it is essential to accurately approximate the system's behaviour while preserving the physicality of its evolutio…

Paper

Quantum Max d-Cut via qudit swap operators

Igor Klep, Tea Štrekelj, and Jurij Volčič,

Quantum 10, 2203 (2026).

Quantum Max Cut (QMC) problem for systems of qubits is an example of a 2-local Hamiltonian problem, and a prominent paradigm in computational complexity theory. This paper investigates the a…

Paper

Floquetifying stabiliser codes with distance-preserving rewrites

Benjamin Rodatz, Boldizsár Poór, and Aleks Kissinger,

Quantum 10, 2202 (2026).

Stabiliser codes with large weight measurements can be challenging to implement fault-tolerantly. To overcome this, we propose a Floquetification procedure which, given a stabiliser code, sy…

Paper

Reducing Spatial and Temporal Dimensionality in the Multidimensional Caldeira-Leggett Model

Hongfei Zhan, Ernest W.Z. Pan, and Zhenning Cai,

Quantum 10, 2201 (2026).

Focusing on the real-time dynamics of the reduced density matrix of the multidimensional Caldeira-Leggett model, several techniques are adopted in this paper to reduce the spatial and tempor…

Paper

Quantum Simulation of Nuclear Dynamics in First Quantization

Luca Spagnoli, Chiara Lissoni, and Alessandro Roggero,

Quantum 10, 2200 (2026).

The study of real time dynamics of nuclear systems is of great importance to provide theoretical predictions of cross sections relevant for both terrestrial experiments as well as applicatio…

Paper

Symmetry-enriched topological order in tensor networks: Defects, gauging and anyon condensation

Dominic J. Williamson, Nick Bultinck, and Frank Verstraete,

Quantum 10, 2199 (2026).

We study symmetry-enriched topological order in two-dimensional tensor network states by using graded matrix product operator algebras to represent symmetry-induced domain walls. A close con…

Paper

A brief history of quantum vs classical computational advantage

Ryan LaRose,

Quantum 10, 2198 (2026).

In this review article we summarize all experiments claiming quantum computational advantage to date. Our review highlights challenges, loopholes, and refutations appearing in subsequent wor…

Paper

Non-Gaussian Noise Magnetometry Using Local Spin Qubits

Jonathan B. Curtis, Amir Yacoby, and Eugene Demler,

Quantum 10, 2197 (2026).

Atomic scale qubits, as may be realized in nitrogen vacancy (NV) centers in diamond, offer the opportunity to study magnetic field noise with nanometer scale spatial resolution. Using these…

Paper

On the relation between perspective-neutral, algebraic, and effective quantum reference frames

Julian De Vuyst, Philipp A. Hoehn, and Artur Tsobanjan,

Quantum 10, 2196 (2026).

The framework of internal quantum reference frames (QRFs) constitutes a universal toolset for dealing with symmetries in quantum theory and has led to new revelations in quantum gravity, gau…

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…

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