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Dissipative Pairing Interactions: Quantum Instabilities, Topological Light, and Volume-Law Entanglement
Andrew Pocklington1,2, Yu-Xin Wang1, A A Clerk1
1Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637, USA.
Physical Review Letters
|April 7, 2023
Summary
We discovered a new way to create instabilities in bosonic systems using stable dissipative pairing interactions. This method is sensitive to wave function localization, enabling selective population and entanglement of edge modes in topological lattices.
Area of Science:
- Quantum physics
- Condensed matter physics
- Non-Hermitian physics
Background:
- Dissipative (non-Hermitian) interactions can lead to unique phenomena in quantum systems.
- Topological lattices offer robust properties, such as protected edge modes.
- Controlling quantum states in bosonic systems is crucial for quantum technologies.
Purpose of the Study:
- To investigate novel bosonic dynamical instabilities arising from dissipative pairing.
- To explore the properties of the dissipative steady state in these systems.
- To develop a method for manipulating edge modes in topological bosonic lattices.
Main Methods:
- Analysis of bosonic dynamical instabilities driven by dissipative pairing interactions.
- Combining stable dissipative pairing with hopping or beam-splitter interactions.
- Investigating the purity of the dissipative steady state.
- Examining the sensitivity to wave function localization.
Main Results:
- A stable dissipative pairing interaction, when combined with stable hopping/beam-splitter interactions, can unexpectedly generate instabilities.
- The dissipative steady state remains pure until the instability threshold, differing from standard parametric instabilities.
- These instabilities show high sensitivity to wave function localization.
- A method for selective population and entanglement of topological edge modes is demonstrated.
Conclusions:
- Dissipative pairing interactions offer a novel route to induce instabilities in bosonic systems.
- This approach provides a resource-friendly method for controlling topological edge modes.
- The findings are compatible with existing experimental platforms like superconducting circuits.
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