Mixed-state entanglement from local randomized measurements

• URL: http://arxiv.org/abs/2007.06305v2
• Date: Fri, 13 Nov 2020 11:29:08 GMT
• Title: Mixed-state entanglement from local randomized measurements
• Authors: Andreas Elben, Richard Kueng, Hsin-Yuan Huang, Rick van Bijnen, Christian Kokail, Marcello Dalmonte, Pasquale Calabrese, Barbara Kraus, John Preskill, Peter Zoller, Beno\^it Vermersch
• Abstract summary: We propose a method for detecting bipartite entanglement in a many-body mixed state based on estimating moments of the partially transposed density matrix. Our method can be applied to any quantum system with single-qubit control.
• Score: 2.536333994672575
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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 post-processing 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)].

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