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Spin Models, Dynamics, and Criticality with Atoms in Tilted Optical Superlattices
Anton S Buyskikh1, Luca Tagliacozzo1,2, Dirk Schuricht3
1Department of Physics and SUPA, University of Strathclyde, Glasgow G4 0NG, United Kingdom.
Physical Review Letters
|September 17, 2019
Summary
Atoms in optical superlattices enable the study of novel coupled spin chains. Researchers engineered Ising spin chains with unique couplings, revealing a tricritical Ising point and complex critical behavior.
Area of Science:
- Quantum simulation
- Condensed matter physics
- Atomic physics
Background:
- Optical superlattices offer unique platforms for quantum many-body physics.
- Engineering novel spin models is crucial for exploring complex quantum phenomena.
Purpose of the Study:
- To demonstrate atoms in tilted optical superlattices as a platform for novel coupled spin chains.
- To engineer and investigate Ising spin chains with XZ and ZZ couplings.
- To explore criticality and nonequilibrium dynamics in these engineered systems.
Main Methods:
- Utilizing period-2 optical superlattices in one dimension.
- Employing optimized tensor network techniques.
- Analyzing criticality and nonequilibrium dynamics.
Main Results:
- Successfully engineered coupled Ising spin chains with XZ and ZZ spin coupling terms.
- Identified a tricritical Ising point in experimentally accessible regimes.
- Observed complex critical behavior arising from interaction-projected models.
Conclusions:
- Atoms in tilted optical superlattices provide a versatile platform for studying exotic spin models.
- The engineered systems are suitable for low-entropy physics investigations.
- This work highlights the potential for complex critical phenomena in interaction-projected models.
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