Quantum entanglement in phase space

Shuheng Liu, Jiajie Guo, Qiongyi He, and Matteo Fadel,

Quantum 10, 2040 (2026).

While commonly used entanglement criteria for continuous variable systems are based on quadrature measurements, here we study entanglement detection from measurements of the Wigner function.…

Aleksandrs Belovs and Stacey Jeffery,

Quantum 10, 2039 (2026).

Given an algorithm that outputs the correct answer with bounded error, say $1/3$, it is sometimes desirable to reduce this error to some arbitrarily small $\varepsilon$ – e.g., if one wants to c…

Luna Lima Keller and Daniel Jost Brod,

Quantum 10, 2038 (2026).

Quantum walks in general graphs, or more specifically scattering on graphs, encompass enough complexity to perform universal quantum computation. Any given quantum circuit can be broken down…

Jerome Wiesemann, Jan Krause, Devashish Tupkary, Norbert Lütkenhaus, Davide Rusca, and Nino Walenta,

Quantum 10, 2037 (2026).

In recent years, quantum key distribution (QKD) has evolved from a scientific research field to a commercially available security solution, supported by mathematically formulated security pr…

Siavash Mirzaei-Ghormish, Jeddy Bennett, and Ryan M. Camacho,

Quantum 10, 2035 (2026).

We present an efficient spin-photon interface for free-space vertical emission coupling. Using a dipole model, we show that our design achieves a far-field collection efficiency of 96% at th…

Giacomo Belli, Marco Mordacci, and Michele Amoretti,

Quantum 10, 2034 (2026).

In this work, a novel quantum neural network is introduced as a means to approximate any unitary evolution through the Standard Recursive Block Basis (SRBB) and is subsequently redesigned wi…

Tim Chan,

Quantum 10, 2033 (2026).

We design Snowflake, a quantum error correction decoder that, for the surface code under circuit-level noise, is roughly 25% more accurate than the Union-Find decoder, with a better mean run…

Maximilian Lutz, Lorenzo Piroli, Georgios Styliaris, and J. Ignacio Cirac,

Quantum 10, 2032 (2026).

We propose applying the adiabatic algorithm to prepare high-energy eigenstates of integrable models on a quantum computer. We first review the standard adiabatic algorithm to prepare ground…

Paul-Louis Etienney, Rémi Robin, and Pierre Rouchon,

Quantum 10, 2031 (2026).

We are interested in the simulation of open quantum systems governed by the Lindblad master equation in an infinite-dimensional Hilbert space. To simulate the solution of this equation, the…

James Mills and Rawad Mezher,

Quantum 10, 2030 (2026).

Photon loss rates set an effective upper limit on the size of computations that can be run on current linear optical quantum devices. We present a family of techniques designed to mitigate t…

Matthew Ding, Robbie King, Bobak T. Kiani, and Eric R. Anschuetz,

Quantum 10, 2029 (2026).

Finding the ground state of strongly-interacting fermionic systems is often the prerequisite for fully understanding both quantum chemistry and condensed matter systems. The Sachdev–Ye–Kitae…

Miguel Murça, Paul K. Faehrmann, and Yasser Omar,

Quantum 10, 2028 (2026).

We introduce and investigate a data access model $\textit{(approximate sample and query)}$ that is satisfiable by the preparation and measurement of block encoded states, as well as in context…

Byeongseon Go, Changhun Oh, and Hyunseok Jeong,

Quantum 10, 2026 (2026).

Boson Sampling, a computational task believed to be classically hard to simulate, is expected to hold promise for demonstrating quantum computational advantage using near-term quantum device…