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Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
Published on: May 15, 2017
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Nonadiabatic Phase Transition with Broken Chiral Symmetry
Bin Yan1,2, Vladimir Y Chernyak3, Wojciech H Zurek2
1Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Physical Review Letters
|March 5, 2021
Summary
We found a way to separate quasiparticles in quantum spin chains using a time-dependent magnetic field. This method suppresses excitations on one sublattice, enabling large density separation.
Area of Science:
- Quantum Many-Body Physics
- Condensed Matter Physics
- Quantum Information Science
Background:
- Nonadiabatic quantum phase transitions occur in systems driven through critical points.
- Ising spin chains with time-dependent fields are models for studying quantum dynamics.
- Understanding quasiparticle behavior is crucial for quantum technologies.
Purpose of the Study:
- To investigate nonadiabatic quantum phase transitions in a specific Ising spin chain model.
- To explore the dynamics of excitations in the presence of a time-dependent transverse field.
- To identify mechanisms for controlling quasiparticle populations.
Main Methods:
- Analysis of an Ising spin chain with a linearly time-dependent transverse field.
- Study of a system with two different spins per unit cell.
- Examination of gapless excitations near critical points.
Main Results:
- Excitations on one sublattice are exponentially suppressed in the nearly adiabatic regime.
- A coherent mechanism for quasiparticle density separation is identified.
- The system exhibits nonadiabatic transitions through critical points.
Conclusions:
- Coherent control over quasiparticle populations is achievable in this spin chain model.
- Exponential suppression of excitations offers a route to large density separation.
- The findings have implications for quantum simulation and information processing.
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