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Published on: February 6, 2014
Modification of late-time phase structure by quantum quenches
Ling-Yan Hung1, Michael Smolkin, Evgeny Sorkin
1Perimeter Institute for Theoretical Physics, Waterloo, Ontario, Canada.
Physical Review Letters
|October 30, 2012
Summary
Sudden changes in coupling constants (quenches) widen the stability of the 3D φ6 model. A new massive phase emerges, becoming the dominant vacuum, which is not explained by simple thermalization.
Area of Science:
- Theoretical physics
- Quantum field theory
- Condensed matter physics
Background:
- Understanding the behavior of quantum field theories under dynamic conditions is crucial.
- The φ6 model serves as a valuable theoretical laboratory for studying phase transitions and vacuum structure.
Purpose of the Study:
- To investigate the impact of non-equilibrium dynamics, specifically coupling constant quenches, on the phase structure of the three-dimensional φ6 model.
- To explore the emergence of new phases and stability properties in the large-N limit.
Main Methods:
- Analysis of the three-dimensional φ6 model in the large-N limit.
- Study of the consequences of sudden changes (quenches) in coupling constants.
Main Results:
- The φ6 coupling exhibits a widened range of stability compared to static scenarios.
- A novel massive phase emerges, which can become the dominant vacuum for strong couplings.
- These phenomena are distinct from simple thermalization or the emergence of a single effective temperature.
Conclusions:
- Sudden quenches can significantly alter the vacuum structure and phase diagram of quantum field theories.
- The observed massive phase suggests new non-equilibrium phenomena in the φ6 model.
- Standard thermalization concepts are insufficient to describe these dynamic effects.
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