Emergence and Dynamical Stability of a Charge Time-Crystal in a Current-Carrying Quantum Dot Simulator

Subhajit Sarkar, Yonatan Dubi

Research output: Contribution to journalArticlepeer-review

Abstract

Periodically driven open quantum systems that never thermalize exhibit a discrete time-crystal behavior, a nonequilibrium quantum phenomenon that has shown promise in quantum information processing applications. Measurements of time-crystallinity are currently limited to (magneto-) optical experiments in atom-cavity systems and spin-systems making it an indirect measurement. We theoretically show that time-crystallinity can be measured directly in the charge-current from a spin-less Hubbard ladder, which can be simulated on a quantum-dot array. We demonstrate that one can dynamically tune the system out and then back on a time-crystal phase, proving its robustness against external forcings. These findings motivate further theoretical and experimental efforts to simulate the time-crystal phenomena in current-carrying nanoscale systems.

Original languageEnglish
Pages (from-to)4445-4451
Number of pages7
JournalNano Letters
Volume22
Issue number11
DOIs
StatePublished - 8 Jun 2022

Keywords

  • Discrete Time-Crystals
  • Dissipative Quantum Systems
  • Dynamical Stability
  • Quantum Dots Arrays
  • Quantum Simulation

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry (all)
  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanical Engineering

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