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 …

Entanglement transitions from stochastic resetting of non-Hermitian quasiparticles

X Turkeshi, M Dalmonte, R Fazio, M Schirò - Physical Review B, 2022 - APS
We put forward a phenomenological theory for entanglement dynamics in monitored
quantum many-body systems with well-defined quasiparticles. Within this theory …

Fractal, logarithmic, and volume-law entangled nonthermal steady states via spacetime duality

M Ippoliti, T Rakovszky, V Khemani - Physical Review X, 2022 - APS
The extension of many-body quantum dynamics to the nonunitary domain has led to a series
of exciting developments, including new out-of-equilibrium entanglement phases and phase …

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 …

Transitions in the learnability of global charges from local measurements

F Barratt, U Agrawal, AC Potter, S Gopalakrishnan… - Physical review …, 2022 - APS
We consider monitored quantum systems with a global conserved charge, and ask how
efficiently an observer (“eavesdropper”) can learn the global charge of such systems from …

Experimental realization of a measurement-induced entanglement phase transition on a superconducting quantum processor

JM Koh, SN Sun, M Motta, AJ Minnich - arXiv preprint arXiv:2203.04338, 2022 - arxiv.org
Ergodic quantum many-body systems undergoing unitary dynamics evolve towards
increasingly entangled states characterized by an extensive scaling of entanglement …

Entanglement transitions in the quantum Ising chain: A comparison between different unravelings of the same Lindbladian

G Piccitto, A Russomanno, D Rossini - Physical Review B, 2022 - APS
We study the dynamics of entanglement in the quantum Ising chain with dephasing
dissipation in a Lindblad master equation form. We consider two unravelings which preserve …

Dynamics of measured many-body quantum chaotic systems

A Altland, M Buchhold, S Diehl, T Micklitz - Physical Review Research, 2022 - APS
We consider the evolution of continuously measured many-body chaotic quantum systems.
Focusing on the dynamics of state purification, we analytically describe the limits of strong …

Continuous gaussian measurements of the free boson CFT: A model for exactly solvable and detectable measurement-induced dynamics

Y Minoguchi, P Rabl, M Buchhold - SciPost Physics, 2022 - scipost.org
Hybrid evolution protocols, composed of unitary dynamics and repeated, weak or projective
measurements, give rise to new, intriguing quantum phenomena, including entanglement …

[HTML][HTML] Dissipative Floquet dynamics: From steady state to measurement induced criticality in trapped-ion chains

P Sierant, G Chiriacò, FM Surace, S Sharma… - Quantum, 2022 - quantum-journal.org
Quantum systems evolving unitarily and subject to quantum measurements exhibit various
types of non-equilibrium phase transitions, arising from the competition between unitary …