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Open Quantum Systems Decoherence

Waveguide QED: controllable channel from quantum interference

arXiv
Authors: Qiong Li, Lan Zhou, C. P. Sun

Year

2013

Paper ID

33301

Status

Preprint

Abstract Read

~2 min

Abstract Words

117

Citations

N/A

Abstract

We study a waveguide QED system with a rectangular waveguide and a two-level system (TLS) inside, where the transverse modes TMmn define the quantum channels of guided photons. It is discovered that the loss of photons in the TM11 channel into the others can be overcome by replacing it with a certain coherent superposition of TMmn channels, which is named as the controllable channel (CC) as the photons in CC can be perfectly reflected or transmitted by the TLS, and never lost into the other channels. The dark state emerges when the photon is incident from one of the scattering-free channels (SFCs) orthogonal to CC. The underlying physics mechanism is the multi-channel interference associated with Fano resonance.

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  • This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
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  • We study a waveguide QED system with a rectangular waveguide and a two-level system (TLS) inside, where the transverse modes TMmn define the quantum channels of guided photons.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1308.2011 [2] arXiv https://arxiv.org/abs/1308.2011 [3] Publisher https://arxiv.org/abs/1308.2011

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