Measurement-induced entanglement phase transition on a superconducting quantum processor with mid-circuit readout

JM Koh, SN Sun, M Motta, AJ Minnich - Nature Physics, 2023 - nature.com
Quantum many-body systems subjected to unitary evolution with the addition of interspersed
measurements exhibit a variety of dynamical phases that do not occur under pure unitary …

Nonlinear sigma models for monitored dynamics of free fermions

M Fava, L Piroli, T Swann, D Bernard, A Nahum - Physical Review X, 2023 - APS
We derive field theory descriptions for measurement-induced phase transitions in free
fermion systems. We focus on a multiflavor Majorana chain, undergoing Hamiltonian …

Benchmarking highly entangled states on a 60-atom analogue quantum simulator

AL Shaw, Z Chen, J Choi, DK Mark, P Scholl… - Nature, 2024 - nature.com
Quantum systems have entered a competitive regime in which classical computers must
make approximations to represent highly entangled quantum states,. However, in this …

Controlling entanglement at absorbing state phase transitions in random circuits

P Sierant, X Turkeshi - Physical Review Letters, 2023 - APS
Many-body unitary dynamics interspersed with repeated measurements display a rich
phenomenology hallmarked by measurement-induced phase transitions. Employing …

Symmetry enriched phases of quantum circuits

Y Bao, S Choi, E Altman - Annals of Physics, 2021 - Elsevier
Quantum circuits consisting of random unitary gates and subject to local measurements
have been shown to undergo a phase transition, tuned by the rate of measurement, from a …

Measurement-induced phase transitions in -dimensional stabilizer circuits

P Sierant, M Schirò, M Lewenstein, X Turkeshi - Physical Review B, 2022 - APS
The interplay between unitary dynamics and local quantum measurements results in
unconventional nonunitary dynamical phases and transitions. In this paper we investigate …

Universal behavior beyond multifractality of wave functions at measurement-induced phase transitions

P Sierant, X Turkeshi - Physical Review Letters, 2022 - APS
We investigate the structure of many-body wave functions of 1D quantum circuits with local
measurements employing the participation entropies. The leading term in system size …

Measurement-induced entanglement transitions in the quantum Ising chain: From infinite to zero clicks

X Turkeshi, A Biella, R Fazio, M Dalmonte, M Schiró - Physical Review B, 2021 - APS
We investigate measurement-induced phase transitions in the quantum Ising chain coupled
to a monitoring environment. We compare two different limits of the measurement problem …

Measurement-induced criticality in extended and long-range unitary circuits

S Sharma, X Turkeshi, R Fazio, M Dalmonte - SciPost Physics Core, 2022 - scipost.org
We explore the dynamical phases of unitary Clifford circuits with variable-range interactions,
coupled to a monitoring environment. We investigate two classes of models, distinguished …

Majorana loop models for measurement-only quantum circuits

K Klocke, M Buchhold - Physical Review X, 2023 - APS
Projective measurements in random quantum circuits lead to a rich breadth of entanglement
phases and extend the realm of nonunitary quantum dynamics. Here, we explore the …