Semidefinite programming relaxations for quantum correlations

A Tavakoli, A Pozas-Kerstjens, P Brown… - Reviews of Modern Physics, 2024‏ - APS
Semidefinite programs are convex optimization problems involving a linear objective
function and a domain of positive-semidefinite matrices. Over the past two decades, they …

Experimental multiparticle entanglement dynamics induced by decoherence

JT Barreiro, P Schindler, O Gühne, T Monz, M Chwalla… - Nature Physics, 2010‏ - nature.com
Multiparticle entanglement leads to richer correlations than two-particle entanglement and
gives rise to striking contradictions with local realism, inequivalent classes of entanglement …

Faithful squashed entanglement

FGSL Brandao, M Christandl, J Yard - Communications in Mathematical …, 2011‏ - Springer
Squashed entanglement is a measure for the entanglement of bipartite quantum states. In
this paper we present a lower bound for squashed entanglement in terms of a distance to …

The radical pair mechanism and the avian chemical compass: Quantum coherence and entanglement

Y Zhang, GP Berman, S Kais - International Journal of Quantum …, 2015‏ - Wiley Online Library
We review the spin radical pair mechanism which is a promising explanation of avian
navigation. This mechanism is based on the dependence of product yields on (1) the …

Linking entanglement detection and state tomography via quantum 2-designs

J Bae, BC Hiesmayr, D McNulty - New Journal of Physics, 2019‏ - iopscience.iop.org
We present an experimentally feasible and efficient method for detecting entangled states
with measurements that extend naturally to a tomographically complete set. Our detection …

Building separable approximations for quantum states via neural networks

A Girardin, N Brunner, T Kriváchy - Physical Review Research, 2022‏ - APS
Finding the closest separable state to a given target state is a notoriously difficult task, even
more difficult than deciding whether a state is entangled or separable. To tackle this task, we …

Type-independent characterization of spacelike separated resources

D Rosset, D Schmid, F Buscemi - Physical Review Letters, 2020‏ - APS
Quantum theory describes multipartite objects of various types: quantum states, nonlocal
boxes, steering assemblages, teleportages, distributed measurements, channels, and so on …

Complete hierarchy of linear systems for certifying quantum entanglement of subspaces

N Johnston, B Lovitz, A Vijayaraghavan - Physical Review A, 2022‏ - APS
We introduce a hierarchy of linear systems for showing that a given subspace of pure
quantum states is entangled (ie, contains no product states). This hierarchy outperforms …

Certifying quantum separability with adaptive polytopes

TA Ohst, XD Yu, O Gühne, CH Nguyen - SciPost Physics, 2024‏ - scipost.org
The concept of entanglement and separability of quantum states is relevant for several fields
in physics. Still, there is a lack of effective operational methods to characterise these …

Physical entanglement between localized orbitals

L Ding, G Dünnweber, C Schilling - Quantum Science and …, 2023‏ - iopscience.iop.org
The goal of the present work is to guide the development of quantum technologies in the
context of fermionic systems. For this, we first elucidate the process of entanglement …