Period-n discrete time crystals and quasicrystals with ultracold bosons
File(s)1907.04703v2.pdf (4.82 MB)
Accepted version
Author(s)
Pizzi, Andrea
Knolle, Johannes
Nunnenkamp, Andreas
Type
Journal Article
Abstract
We investigate the out-of-equilibrium properties of a system of interacting bosons in a ring lattice. We present a Floquet driving that induces clockwise (counterclockwise) circulation of the particles among the odd (even) sites of the ring which can be mapped to a fully connected model of clocks of two counterrotating species. The clocklike motion of the particles is at the core of a period-
n
discrete time crystal where
L
=
2
n
is the number of lattice sites. In the presence of a “staircaselike” on-site potential, we report the emergence of a second characteristic timescale in addition to the period
n
-tupling. This new timescale depends on the microscopic parameters of the Hamiltonian and is incommensurate with the Floquet period, underpinning a dynamical phase we call “time quasicrystal.” The rich dynamical phase diagram also features a thermal phase and an oscillatory phase, all of which we investigate and characterize. Our simple, yet rich model can be realized with state-of-the-art ultracold atoms experiments.
n
discrete time crystal where
L
=
2
n
is the number of lattice sites. In the presence of a “staircaselike” on-site potential, we report the emergence of a second characteristic timescale in addition to the period
n
-tupling. This new timescale depends on the microscopic parameters of the Hamiltonian and is incommensurate with the Floquet period, underpinning a dynamical phase we call “time quasicrystal.” The rich dynamical phase diagram also features a thermal phase and an oscillatory phase, all of which we investigate and characterize. Our simple, yet rich model can be realized with state-of-the-art ultracold atoms experiments.
Date Issued
2019-10-09
Date Acceptance
2019-10-01
Citation
Physical Review Letters, 2019, 123 (15), pp.150601-1-150601-6
ISSN
0031-9007
Publisher
American Physical Society
Start Page
150601-1
End Page
150601-6
Journal / Book Title
Physical Review Letters
Volume
123
Issue
15
Copyright Statement
© 2019 American Physical Society
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000489255900003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
ORDER
Publication Status
Published
Article Number
ARTN 150601
Date Publish Online
2019-10-09