Quantum

Quantum has published 1359 Papers in 8 Volumes, as well as 80 Views in Quantum Views.

Rigorous results on approach to thermal equilibrium, entanglement, and nonclassicality of an optical quantum field mode scattering from the elements of a non-equilibrium quantum reservoir

Stephan De Bievre, Marco Merkli, and Paul E. Parris,

Quantum 8, 1360 (2024).

Rigorous derivations of the approach of individual elements of large isolated systems to a state of thermal equilibrium, starting from arbitrary initial states, are exceedingly rare. This is…

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Scalable, ab initio protocol for quantum simulating SU($N$)$\times$U(1) Lattice Gauge Theories

Federica Maria Surace, Pierre Fromholz, Francesco Scazza, and Marcello Dalmonte,

Quantum 8, 1359 (2024).

We propose a protocol for the scalable quantum simulation of SU($N$)$\times$U(1) lattice gauge theories with alkaline-earth like atoms in optical lattices in both one- and two-dimensional system…

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Empirical Sample Complexity of Neural Network Mixed State Reconstruction

Haimeng Zhao, Giuseppe Carleo, and Filippo Vicentini,

Quantum 8, 1358 (2024).

Quantum state reconstruction using Neural Quantum States has been proposed as a viable tool to reduce quantum shot complexity in practical applications, and its advantage over competing tech…

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Enhanced entanglement in multi-bath spin-boson models

Charlie R. Hogg, Federico Cerisola, James D. Cresser, Simon A. R. Horsley, and Janet Anders,

Quantum 8, 1357 (2024).

The spin-boson model usually considers a spin coupled to a single bosonic bath. However, some physical situations require coupling of the spin to multiple environments. For example, spins in…

Paper

The Bethe Ansatz as a Quantum Circuit

Roberto Ruiz, Alejandro Sopena, Max Hunter Gordon, Germán Sierra, and Esperanza López,

Quantum 8, 1356 (2024).

The Bethe ansatz represents an analytical method enabling the exact solution of numerous models in condensed matter physics and statistical mechanics. When a global symmetry is present, the…

Paper

Precisely determining photon-number in real time

Leonardo Assis Morais, Till Weinhold, Marcelo Pereira de Almeida, Joshua Combes, Markus Rambach, Adriana Lita, Thomas Gerrits, Sae Woo Nam, Andrew G. White, and Geoff Gillett,

Quantum 8, 1355 (2024).

Superconducting transition-edge sensors (TES) are extremely sensitive microcalorimeters used as photon detectors with unparalleled energy resolution. They have found application from measuri…

Paper

A High Performance Compiler for Very Large Scale Surface Code Computations

George Watkins, Hoang Minh Nguyen, Keelan Watkins, Steven Pearce, Hoi-Kwan Lau, and Alexandru Paler,

Quantum 8, 1354 (2024).

We present the first high performance compiler for very large scale quantum error correction: it translates an arbitrary quantum circuit to surface code operations based on lattice surgery.…

Paper

Resource Marginal Problems

Chung-Yun Hsieh, Gelo Noel M. Tabia, Yu-Chun Yin, and Yeong-Cherng Liang,

Quantum 8, 1353 (2024).

We introduce the $\textit{resource marginal problems}$, which concern the possibility of having a resource-free target subsystem compatible with a $given$ collection of marginal density matrices…

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Relaxations and Exact Solutions to Quantum Max Cut via the Algebraic Structure of Swap Operators

Adam Bene Watts, Anirban Chowdhury, Aidan Epperly, J. William Helton, and Igor Klep,

Quantum 8, 1352 (2024).

The Quantum Max Cut (QMC) problem has emerged as a test-problem for designing approximation algorithms for local Hamiltonian problems. In this paper we attack this problem using the algebrai…

Paper

Magic of quantum hypergraph states

Junjie Chen, Yuxuan Yan, and You Zhou,

Quantum 8, 1351 (2024).

Magic, or nonstabilizerness, characterizes the deviation of a quantum state from the set of stabilizer states, playing a fundamental role in quantum state complexity and universal fault-tole…

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Classical simulation of non-Gaussian fermionic circuits

Beatriz Dias and Robert Koenig,

Quantum 8, 1350 (2024).

We propose efficient algorithms for classically simulating fermionic linear optics operations applied to non-Gaussian initial states. By gadget constructions, this provides algorithms for fe…

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Strong quantum nonlocality and unextendibility without entanglement in $N$-partite systems with odd $N$

Yiyun He, Fei Shi, and Xiande Zhang,

Quantum 8, 1349 (2024).

A set of orthogonal product states is strongly nonlocal if it is locally irreducible in every bipartition, which shows the phenomenon of strong quantum nonlocality without entanglement. Alth…

Paper

Generating $k$ EPR-pairs from an $n$-party resource state

Sergey Bravyi, Yash Sharma, Mario Szegedy, and Ronald de Wolf,

Quantum 8, 1348 (2024).

Motivated by quantum network applications over classical channels, we initiate the study of $n$-party resource states from which LOCC protocols can create EPR-pairs between any $k$ disjoint pair…

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Magic in generalized Rokhsar-Kivelson wavefunctions

Poetri Sonya Tarabunga and Claudio Castelnovo,

Quantum 8, 1347 (2024).

Magic is a property of a quantum state that characterizes its deviation from a stabilizer state, serving as a useful resource for achieving universal quantum computation e.g., within schemes…

Paper

Virtual mitigation of coherent non-adiabatic transitions by echo verification

Benjamin F. Schiffer, Dyon van Vreumingen, Jordi Tura, and Stefano Polla,

Quantum 8, 1346 (2024).

Transitions out of the ground space limit the performance of quantum adiabatic algorithms, while hardware imperfections impose stringent limitations on the circuit depth. We propose an adiab…

Paper

Partial Syndrome Measurement for Hypergraph Product Codes

Noah Berthusen and Daniel Gottesman,

Quantum 8, 1345 (2024).

Hypergraph product codes are a promising avenue to achieving fault-tolerant quantum computation with constant overhead. When embedding these and other constant-rate qLDPC codes into 2D, a si…