TY - JOUR
T1 - Mixed-State Entanglement from Local Randomized Measurements
AU - Elben, Andreas
AU - Kueng, Richard
AU - Huang, Hsin Yuan (robert)
AU - Van Bijnen, Rick
AU - Kokail, Christian
AU - Dalmonte, Marcello
AU - Calabrese, Pasquale
AU - Kraus, Barbara
AU - Preskill, John
AU - Zoller, Peter
AU - Vermersch, Benoit
N1 - Publisher Copyright:
© 2020 American Physical Society.
PY - 2020/11/11
Y1 - 2020/11/11
N2 - We propose a method for detecting bipartite entanglement in a many-body mixed state based on estimating moments of the partially transposed density matrix. The estimates are obtained by performing local random measurements on the state, followed by postprocessing using the classical shadows framework. Our method can be applied to any quantum system with single-qubit control. We provide a detailed analysis of the required number of experimental runs, and demonstrate the protocol using existing experimental data [Brydges et al., Science 364, 260 (2019)SCIEAS0036-807510.1126/science.aau4963].
AB - We propose a method for detecting bipartite entanglement in a many-body mixed state based on estimating moments of the partially transposed density matrix. The estimates are obtained by performing local random measurements on the state, followed by postprocessing using the classical shadows framework. Our method can be applied to any quantum system with single-qubit control. We provide a detailed analysis of the required number of experimental runs, and demonstrate the protocol using existing experimental data [Brydges et al., Science 364, 260 (2019)SCIEAS0036-807510.1126/science.aau4963].
UR - http://www.scopus.com/inward/record.url?scp=85096096091&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.125.200501
DO - 10.1103/PhysRevLett.125.200501
M3 - Article
C2 - 33258654
AN - SCOPUS:85096096091
SN - 0031-9007
VL - 125
JO - Physical Review Letters
JF - Physical Review Letters
IS - 20
M1 - 200501
ER -