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Emergent Bloch Oscillations in a Kinetically Constrained Rydberg Spin Lattice
Matteo Magoni1, Paolo P Mazza1, Igor Lesanovsky1,2
1Institut für Theoretische Physik, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany.
Physical Review Letters
|March 30, 2021
Summary
Weak interactions in spin systems can cause Bloch oscillations, hindering relaxation and leading to nonergodic behavior. These oscillations, observed in Rydberg atom experiments, offer control over spin cluster dynamics.
Area of Science:
- Condensed Matter Physics
- Quantum Simulation
- Atomic Physics
Background:
- Kinetically constrained spin systems exhibit unique relaxation dynamics.
- Rydberg lattice gases provide an experimental platform for studying spin interactions.
- Facilitated excitation in spin systems influences energy transfer.
Purpose of the Study:
- To investigate the impact of extended interactions on spin cluster relaxation.
- To identify mechanisms leading to nonergodic behavior in constrained spin systems.
- To explore experimental detection and control of emergent phenomena.
Main Methods:
- Theoretical modeling of spin cluster dynamics.
- Analysis of facilitated excitation in Rydberg systems.
- Investigation of weak, long-range interactions.
Main Results:
- Weak interactions beyond nearest neighbors induce a linear potential.
- This potential can lead to Bloch oscillations in spin clusters.
- Bloch oscillations impede cluster expansion and system relaxation.
- Nonergodic behavior arises from reduced state connectivity and weak interactions.
Conclusions:
- Emergent Bloch oscillations in spin clusters are a consequence of specific interaction potentials.
- These oscillations can be experimentally detected via Rydberg atom density measurements.
- Spin-orbit coupling offers a pathway to control spin cluster relaxation dynamics.
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