Random quantum circuits

MPA Fisher, V Khemani, A Nahum… - Annual Review of …, 2023‏ - annualreviews.org
Quantum circuits—built from local unitary gates and local measurements—are a new
playground for quantum many-body physics and a tractable setting to explore universal …

Engineered dissipation for quantum information science

PM Harrington, EJ Mueller, KW Murch - Nature Reviews Physics, 2022‏ - nature.com
Quantum information processing relies on the precise control of non-classical states in the
presence of many uncontrolled environmental degrees of freedom. The interactions …

Entanglement phase transition induced by the non-Hermitian skin effect

K Kawabata, T Numasawa, S Ryu - Physical Review X, 2023‏ - APS
Recent years have seen remarkable development in open quantum systems effectively
described by non-Hermitian Hamiltonians. A unique feature of non-Hermitian topological …

Measurement-induced quantum phases realized in a trapped-ion quantum computer

C Noel, P Niroula, D Zhu, A Risinger, L Egan… - Nature Physics, 2022‏ - nature.com
Many-body open quantum systems balance internal dynamics against decoherence and
measurements induced by interactions with an environment,. Quantum circuits composed of …

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 …

Theory of free fermions under random projective measurements

I Poboiko, P Pöpperl, IV Gornyi, AD Mirlin - Physical Review X, 2023‏ - APS
We develop an analytical approach to the study of one-dimensional free fermions subject to
random projective measurements of local site occupation numbers, based on the Keldysh …

Entanglement transition in a monitored free-fermion chain: From extended criticality to area law

O Alberton, M Buchhold, S Diehl - Physical Review Letters, 2021‏ - APS
We analyze the quantum trajectory dynamics of free fermions subject to continuous
monitoring. For weak monitoring, we identify a novel dynamical regime of subextensive …

Measurement-induced transition in long-range interacting quantum circuits

M Block, Y Bao, S Choi, E Altman, NY Yao - Physical Review Letters, 2022‏ - APS
The competition between scrambling unitary evolution and projective measurements leads
to a phase transition in the dynamics of quantum entanglement. Here, we demonstrate that …

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

A Nahum, S Roy, B Skinner, J Ruhman - PRX Quantum, 2021‏ - APS
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 …

Measurement-induced phase transition in the monitored Sachdev-Ye-Kitaev model

SK Jian, C Liu, X Chen, B Swingle, P Zhang - Physical review letters, 2021‏ - APS
We construct Brownian Sachdev-Ye-Kitaev (SYK) chains subjected to continuous monitoring
and explore possible entanglement phase transitions therein. We analytically derive the …