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Transverse-Field Ising Dynamics in a Rydberg-Dressed Atomic Gas
V Borish1, O Marković2, J A Hines1
1Department of Applied Physics, Stanford University, Stanford, California 94305, USA.
Physical Review Letters
|February 29, 2020
Summary
Researchers achieved long-range Ising interactions in cold cesium atoms using Rydberg dressing, enabling control over quantum dynamics and phase transitions for future quantum technologies.
Area of Science:
- Atomic, Molecular, and Optical Physics
- Quantum Simulation
- Condensed Matter Physics
Background:
- Quantum simulation requires precise control over interatomic interactions.
- Rydberg interactions offer a promising pathway for engineering controllable quantum systems.
- Cold atomic gases provide a versatile platform for studying many-body quantum phenomena.
Purpose of the Study:
- To realize and characterize long-range Ising interactions in a cold cesium atom gas.
- To emulate a transverse-field Ising model and investigate quantum phase transitions.
- To explore the potential of optical addressing for quantum control and applications.
Main Methods:
- Utilized Rydberg dressing to enhance interactions between cesium atoms.
- Employed Ramsey spectroscopy to measure mean-field shifts and observe one-axis twisting dynamics.
- Applied periodic microwave fields to emulate a transverse-field Ising model.
Main Results:
- Successfully demonstrated long-range Ising interactions mediated by Rydberg states near a Förster resonance.
- Observed characteristic dynamics of the Ising model, including signatures of the paramagnetic-ferromagnetic phase transition.
- Showcased local and dynamical control over interactions via optical addressing.
Conclusions:
- Rydberg dressing provides a powerful tool for engineering tunable interactions in cold atoms.
- The demonstrated control enables investigations into quantum criticality and spin squeezing.
- This work paves the way for advanced quantum simulations and applications in quantum information science.
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