Enhancement of Quantum Excitation Transport by Photonic Nonreciprocity
- URL: http://arxiv.org/abs/2204.12473v1
- Date: Tue, 26 Apr 2022 17:44:52 GMT
- Title: Enhancement of Quantum Excitation Transport by Photonic Nonreciprocity
- Authors: S. Ali Hassani Gangaraj, Lei Ying, Francesco Monticone, Zongfu Yu
- Abstract summary: Enhanced interaction between two two-level emitters (e.g., atoms) by nonreciprocal photonic media can be of benefit to broad areas.
We show that breaking electromagnetic reciprocity makes it possible for the cooperative decay rate to exceed the spontaneous decay rate.
We then show that breaking reciprocity in such a system via driving a DC current through the plasmonic material can drastically increase the probability of photon emission from one emitter to another.
- Score: 8.700048798573993
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Enhanced interaction between two two-level emitters (e.g., atoms) by
nonreciprocal photonic media can be of benefit to broad areas, from quantum
information science to biological detection. Here we provide a detailed
analysis on why nonreciprocal photon-mediated interaction enhances inter-atomic
excitation transport efficiency. We investigate a system consisting of two
two-level emitters embedded in a generic photonic environment. By comparing
symmetric and asymmetric photon-exchange, we analytically show that breaking
electromagnetic reciprocity makes it possible for the cooperative decay rate to
exceed the spontaneous decay rate even in a translation-invariant homogeneous
system. This means that the excitation of an emitter must decay mostly into the
other emitter rather than leaking and dissipating into the reservoir photonic
modes. We also provide an example where a chain of two-level emitters
dominantly interact via the reciprocal modes of a plasmonic waveguide. We then
show that breaking reciprocity in such a system via driving a DC current
through the plasmonic material can drastically increase the probability of
photon emission from one emitter to another, leading to an order-of-magnitude
enhancement in quantum energy-transport efficiency.
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