Dissipative Pairing Interactions: Quantum Instabilities, Topological
Light, and Volume-Law Entanglement
- URL: http://arxiv.org/abs/2210.09252v2
- Date: Thu, 23 Mar 2023 19:03:14 GMT
- Title: Dissipative Pairing Interactions: Quantum Instabilities, Topological
Light, and Volume-Law Entanglement
- Authors: Andrew Pocklington, Yu-Xin Wang, Aashish A. Clerk
- Abstract summary: We show that a completely stable dissipative pairing interaction can be combined with simple hopping or beam-splitter interactions to generate instabilities.
These instabilities also exhibit an extremely pronounced sensitivity to wavefunction localization.
- Score: 15.175005339708768
- License: http://creativecommons.org/licenses/by-nc-nd/4.0/
- Abstract: We analyze an unusual class of bosonic dynamical instabilities that arise
from dissipative (or non-Hermitian) pairing interactions. We show that,
surprisingly, a completely stable dissipative pairing interaction can be
combined with simple hopping or beam-splitter interactions (also stable) to
generate instabilities. Further, we find that the dissipative steady state in
such a situation remains completely pure up until the instability threshold (in
clear distinction from standard parametric instabilities). These
pairing-induced instabilities also exhibit an extremely pronounced sensitivity
to wavefunction localization. This provides a simple yet powerful method for
selectively populating and entangling edge modes of photonic (or more general
bosonic) lattices having a topological bandstructure. The underlying
dissipative pairing interaction is experimentally resource-friendly, requiring
the addition of a single additional localized interaction to an existing
lattice, and is compatible with a number of existing platforms, including
superconducting circuits.
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