Nonreciprocal and chiral single-photon scattering for giant atoms
- URL: http://arxiv.org/abs/2203.00823v1
- Date: Wed, 2 Mar 2022 02:25:12 GMT
- Title: Nonreciprocal and chiral single-photon scattering for giant atoms
- Authors: Yao-Tong Chen, Lei Du, Lingzhen Guo, Zhihai Wang, Yan Zhang, Yong Li,
and Jin-Hui Wu
- Abstract summary: We investigate the nontrivial single-photon scattering properties of giant atoms coupled to waveguides.
Our proposed giant-atom structures have potential applications of high-efficient single-photon targeted router and circulator.
- Score: 7.358111900462565
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: In this work, we investigate the nontrivial single-photon scattering
properties of giant atoms coupled to waveguides that can be an effective
platform for realising nonreciprocal and chiral quantum optics. For the
two-level giant-atom setup, we identify the condition for nonreciprocal
transmission: the external atomic dissipation is further required other than
the breaking of time-reversal symmetry by local coupling phases. Especially, in
the non-Markovian regime, unconventional revival peaks periodically appear in
the refection spectrum of such a two-level giant-atom system. To explore more
interesting scattering behaviours, we further extend the two-level giant-atom
system to $\Delta$-type and $\nabla$-type three-level giant atoms coupled to
double waveguides without external atomic dissipation. We analyse the different
physical mechanisms for the nonreciprocal and chiral scattering properties of
the $\Delta$-type and $\nabla$-type giant atoms. Our proposed giant-atom
structures have potential applications of high-efficient single-photon targeted
router and circulator for quantum information precessing.
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