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Measurement and entanglement phase transitions in all-to-all quantum circuits, on quantum trees, and in Landau-Ginsburg theory

Abstract:

A quantum many-body system whose dynamics includes local measurements at a nonzero rate can be in distinct dynamical phases, with differing entanglement properties. We introduce theoretical approaches to measurement-induced phase transitions (MPTs) and also to entanglement transitions in random tensor networks. Many of our results are for “all-to-all” quantum circuits with unitaries and measurements, in which any qubit can couple to any other, and related settings where some of the complicati...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/prxquantum.2.010352

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Role:
Author
ORCID:
0000-0002-3488-4532
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Institution:
University of Oxford
Department:
CHEMISTRY
Sub department:
Physical & Theoretical Chem
Role:
Author
ORCID:
0000-0003-2152-472X
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Role:
Author
ORCID:
0000-0003-0774-3563
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Role:
Author
ORCID:
0000-0003-2563-0706
Publisher:
American Physical Society
Journal:
PRX Quantum More from this journal
Volume:
2
Issue:
1
Article number:
10352
Publication date:
2021-03-30
Acceptance date:
2021-01-19
DOI:
EISSN:
2691-3399
Language:
English
Keywords:
Pubs id:
1133726
Local pid:
pubs:1133726
Deposit date:
2021-04-20

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