Random Quantum Circuits

By Matthew Fisher, V. Khemani, A. Nahum, S. Vijay. Annual Review of Condensed Matter Physics, 2022

555 citations recorded by the source corpus.

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 collective phenomena far from equilibrium. These models have shed light on longstanding questions about thermalization and chaos, and on the underlying universal dynamics of quantum information and entanglement. In addition, such models generate new sets of questions and give rise to phenomena with no traditional analog, such as dynamical phase transitions in quantum systems that are monitored by an external observer. Quantum circuit dynamics is also topical in view of experimental progress in building digital quantum simulators that allow control of precisely these ingredients. Randomness in the circuit elements allows a high level of theoretical control, with a key theme being mappings between real-time quantum dynamics and effective classical lattice models or dynamical processes. Many of the universal phenomena that can be identified in this tractable setting apply to much wider classes of more structured many-body dynamics. Expected final online publication date for the Annual Review of Condensed Matter Physics, Volume 14 is March 2023. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/270e824e46c95575b0393f3ccde347c69d46c3da

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In Artificial Intelligence

1. Alec Jenkins
2. Felix Rönchen
3. Aruku Senoo
4. Joanna W. Lis
5. W. McGrew
6. A. Kaufman

In Atomic and Molecular Physics, and Optics

1. Alec Jenkins
2. Aruku Senoo
3. Joanna W. Lis
4. W. McGrew
5. Felix Rönchen
6. A. Kaufman

Citations in the corpus

• Midcircuit Operations Using the omg Architecture in Neutral Atom Arrays (2023, background): “A new class of phase transitions have garnered recent significant interest, where a transition in entanglement scaling is determined by the relative rate of midcircuit measurements compared to coherent dynamics [9,92,93].”