Random quantum circuits
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 …
playground for quantum many-body physics and a tractable setting to explore universal …
Effective theory for the measurement-induced phase transition of Dirac fermions
A wave function subject to unitary time evolution and exposed to measurements undergoes
pure state dynamics, with deterministic unitary and probabilistic measurement-induced state …
pure state dynamics, with deterministic unitary and probabilistic measurement-induced state …
Nonlinear sigma models for monitored dynamics of free fermions
We derive field theory descriptions for measurement-induced phase transitions in free
fermion systems. We focus on a multiflavor Majorana chain, undergoing Hamiltonian …
fermion systems. We focus on a multiflavor Majorana chain, undergoing Hamiltonian …
Theory of free fermions under random projective measurements
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 …
random projective measurements of local site occupation numbers, based on the Keldysh …
Entanglement and charge-sharpening transitions in U (1) symmetric monitored quantum circuits
Monitored quantum circuits can exhibit an entanglement transition as a function of the rate of
measurements, stemming from the competition between scrambling unitary dynamics and …
measurements, stemming from the competition between scrambling unitary dynamics and …
Spacetime duality between localization transitions and measurement-induced transitions
Time evolution of quantum many-body systems typically leads to a state with maximal
entanglement allowed by symmetries. Two distinct routes to impede entanglement growth …
entanglement allowed by symmetries. Two distinct routes to impede entanglement growth …
Measurement-induced entanglement transitions in the quantum Ising chain: From infinite to zero clicks
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 …
to a monitoring environment. We compare two different limits of the measurement problem …
Measurement-induced criticality in extended and long-range unitary circuits
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 …
coupled to a monitoring environment. We investigate two classes of models, distinguished …
Quantum entanglement in the Sachdev—Ye—Kitaev model and its generalizations
P Zhang - Frontiers of Physics, 2022 - Springer
Entanglement is one of the most important concepts in quantum physics. We review recent
progress in understanding the quantum entanglement in many-body systems using large-N …
progress in understanding the quantum entanglement in many-body systems using large-N …
Majorana loop models for measurement-only quantum circuits
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 …
phases and extend the realm of nonunitary quantum dynamics. Here, we explore the …