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Measurement incompatibility in Bayesian multiparameter quantum estimation

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Quantum has published 2207 Papers in 10 Volumes, as well as 87 Views in Quantum Views.

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…

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…

Paper

Quantifiers and witnesses for the nonclassicality of measurements and of states

Yujie Zhang, Yìlè Yīng, and David Schmid,

Quantum 10, 2180 (2026).

In recent work [Phys. Rev. X 16, 021050], we proposed a unified notion of nonclassicality that applies to arbitrary processes in quantum theory, including individual quantum states, measurem…

Paper

Stabilizer Ranks, Barnes Wall Lattices and Magic Monotones

Amolak Ratan Kalra and Pulkit Sinha,

Quantum 10, 2179 (2026).

In 2024, Kliuchnikov and Schönnenbeck showed a connection between the Barnes Wall lattices, stabilizer states and Clifford operations. In this work, we study their results and relate them to…

Paper

Modulator-Assisted Zeno Control of Energy Transfer in Quantum Batteries

Songbo Xie, Manas Sajjan, Ashok Ajoy, and Sabre Kais,

Quantum 10, 2178 (2026).

Efficient operation of quantum batteries requires not only fast energy transfer but also the ability to halt the charging process to prevent reverse flow. Existing approaches typically rely…

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