Spin models, dynamics, and criticality with atoms in tilted optical superlattices

Anton S. Buyskikh, Luca Tagliacozzo, Dirk Schuricht, Chris A. Hooley, David Pekker, Andrew J. Daley

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We show that atoms in tilted optical superlattices provide a platform for exploring coupled spin chains of forms that are not present in other systems. In particular, using a period-2 superlattice in one dimension, we show that coupled Ising spin chains with XZ and ZZ spin coupling terms can be engineered. We use optimized tensor network techniques to explore the criticality and nonequilibrium dynamics in these models, finding a tricritical Ising point in regimes that are accessible in current experiments. These setups are ideal for studying low-entropy physics, as initial entropy is "frozen-out" in realizing the spin models, and provide an example of the complex critical behavior that can arise from interaction-projected models.

LanguageEnglish
Article number090401
Number of pages6
JournalPhysical Review Letters
Volume123
Issue number9
DOIs
Publication statusPublished - 27 Aug 2019

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dynamic models
superlattices
atoms
entropy
platforms
tensors
physics
interactions

Keywords

  • optical superlattice
  • coupled spin chains
  • tensor network techniques

Cite this

Buyskikh, Anton S. ; Tagliacozzo, Luca ; Schuricht, Dirk ; Hooley, Chris A. ; Pekker, David ; Daley, Andrew J. / Spin models, dynamics, and criticality with atoms in tilted optical superlattices. In: Physical Review Letters. 2019 ; Vol. 123, No. 9.
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Spin models, dynamics, and criticality with atoms in tilted optical superlattices. / Buyskikh, Anton S.; Tagliacozzo, Luca; Schuricht, Dirk; Hooley, Chris A.; Pekker, David; Daley, Andrew J.

In: Physical Review Letters, Vol. 123, No. 9, 090401, 27.08.2019.

Research output: Contribution to journalArticle

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AU - Buyskikh, Anton S.

AU - Tagliacozzo, Luca

AU - Schuricht, Dirk

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AU - Daley, Andrew J.

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AB - We show that atoms in tilted optical superlattices provide a platform for exploring coupled spin chains of forms that are not present in other systems. In particular, using a period-2 superlattice in one dimension, we show that coupled Ising spin chains with XZ and ZZ spin coupling terms can be engineered. We use optimized tensor network techniques to explore the criticality and nonequilibrium dynamics in these models, finding a tricritical Ising point in regimes that are accessible in current experiments. These setups are ideal for studying low-entropy physics, as initial entropy is "frozen-out" in realizing the spin models, and provide an example of the complex critical behavior that can arise from interaction-projected models.

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