We study the collective dynamics of a clean Floquet system of cold atoms, numerically simulating two realistic setups based on a regular chain of interacting Rydberg atoms driven by laser fields. In both cases, the population evolution and its Fourier spectrum display clear signatures of a discrete time crystal (DTC), exhibiting the appearance of a robust subharmonic oscillation which persists on a timescale increasing with the chain size, within a certain range of control parameters. We also characterize how the DTC stability is affected by dissipative processes, typically present in this atomic system even though the Rydberg state is very long lived.

Discrete time crystal in a finite chain of Rydberg atoms without disorder

Rossini D.;Artoni M.;La Rocca G. C.
2020

Abstract

We study the collective dynamics of a clean Floquet system of cold atoms, numerically simulating two realistic setups based on a regular chain of interacting Rydberg atoms driven by laser fields. In both cases, the population evolution and its Fourier spectrum display clear signatures of a discrete time crystal (DTC), exhibiting the appearance of a robust subharmonic oscillation which persists on a timescale increasing with the chain size, within a certain range of control parameters. We also characterize how the DTC stability is affected by dissipative processes, typically present in this atomic system even though the Rydberg state is very long lived.
Settore FIS/03 - Fisica della Materia
File in questo prodotto:
File Dimensione Formato  
PhysRevA.101.013417.pdf

accesso aperto

Tipologia: Published version
Licenza: Accesso gratuito (sola lettura)
Dimensione 935.15 kB
Formato Adobe PDF
935.15 kB Adobe PDF Visualizza/Apri
manu-december.pdf

accesso aperto

Tipologia: Accepted version (post-print)
Licenza: Accesso gratuito (sola lettura)
Dimensione 1.26 MB
Formato Adobe PDF
1.26 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/82825
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 17
  • ???jsp.display-item.citation.isi??? 19
social impact