TY - JOUR

T1 - Feedback-Induced Quantum Phase Transitions Using Weak Measurements

AU - Ivanov, D. A.

AU - Yu Ivanova, T.

AU - Caballero-Benitez, S. F.

AU - Mekhov, I. B.

N1 - Publisher Copyright: © 2020 American Physical Society. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/1/6

Y1 - 2020/1/6

N2 - We show that applying feedback and weak measurements to a quantum system induces phase transitions beyond the dissipative ones. Feedback enables controlling essentially quantum properties of the transition, i.e., its critical exponent, as it is driven by the fundamental quantum fluctuations due to measurement. Feedback provides the non-Markovianity and nonlinearity to the hybrid quantum-classical system, and enables simulating effects similar to spin-bath problems and Floquet time crystals with tunable long-range (long-memory) interactions.

AB - We show that applying feedback and weak measurements to a quantum system induces phase transitions beyond the dissipative ones. Feedback enables controlling essentially quantum properties of the transition, i.e., its critical exponent, as it is driven by the fundamental quantum fluctuations due to measurement. Feedback provides the non-Markovianity and nonlinearity to the hybrid quantum-classical system, and enables simulating effects similar to spin-bath problems and Floquet time crystals with tunable long-range (long-memory) interactions.

KW - DYNAMICS

UR - http://www.scopus.com/inward/record.url?scp=85078266880&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.124.010603

DO - 10.1103/PhysRevLett.124.010603

M3 - Article

C2 - 31976715

AN - SCOPUS:85078266880

VL - 124

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 1

M1 - 010603

ER -