English

Separate measurement- and feedback-driven entanglement transitions in the stochastic control of chaos

Disordered Systems and Neural Networks 2023-09-12 v1 Statistical Mechanics Chaotic Dynamics Quantum Physics

Abstract

We study measurement-induced entanglement and control phase transitions in a quantum analog of the Bernoulli map subjected to a classically-inspired control protocol. When entangling gates are restricted to the Clifford group, separate entanglement (pentp_\mathrm{ent}) and control (pctrlp_\mathrm{ctrl}) transitions emerge, revealing two distinct universality classes. The control transition has critical exponents ν\nu and zz consistent with the classical map (a random walk) while the entanglement transition is revealed to have similar exponents as the measurement-induced phase transition in Clifford hybrid dynamics. This is distinct from the case of generic entangling gates in the same model, where pent=pctrlp_\mathrm{ent} = p_\mathrm{ctrl} and universality is controlled by the random walk.

Keywords

Cite

@article{arxiv.2309.04520,
  title  = {Separate measurement- and feedback-driven entanglement transitions in the stochastic control of chaos},
  author = {Conner LeMaire and Andrew A. Allocca and J. H. Pixley and Thomas Iadecola and Justin H. Wilson},
  journal= {arXiv preprint arXiv:2309.04520},
  year   = {2023}
}

Comments

6 + 1 pages, 4 + 1 figures