Engineering photon delocalization in a Rabi dimer with a dissipative bath

A Rabi dimer is used to model a recently reported circuit quantum electrodynamics system composed of two coupled transmission‐line resonators with each being coupled to one qubit. In this study, a phonon bath is adopted to mimic the multimode micromechanical resonators and is coupled to the qubits i...

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Main Authors: Zheng, Fulu, Zhang, Yuyu, Wang, Lu, Wei, Yadong, Zhao, Yang
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/137032
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1370322023-07-14T15:58:52Z Engineering photon delocalization in a Rabi dimer with a dissipative bath Zheng, Fulu Zhang, Yuyu Wang, Lu Wei, Yadong Zhao, Yang School of Materials Science & Engineering Science::Physics::Atomic physics::Quantum theory Davydov Ansätze Photon Delocalization A Rabi dimer is used to model a recently reported circuit quantum electrodynamics system composed of two coupled transmission‐line resonators with each being coupled to one qubit. In this study, a phonon bath is adopted to mimic the multimode micromechanical resonators and is coupled to the qubits in the Rabi dimer. The dynamical behavior of the composite system is studied by the Dirac–Frenkel time‐dependent variational principle combined with the multiple Davydov D2 ansätze. Initially, all the photons are pumped into the left resonator, and the two qubits are in the down state coupled with the phonon vacuum. In the strong qubit–photon coupling regime, the photon dynamics can be engineered by tuning the qubit–bath coupling strength α and photon delocalization is achieved by increasing α. In the absence of dissipation, photons are localized in the initial resonator. Nevertheless, with moderate qubit–bath coupling, photons are delocalized with quasiequilibration of the photon population in two resonators at long times. In this case, high‐frequency bath modes are activated by interacting with depolarized qubits. For strong dissipation, photon delocalization is achieved via frequent photon‐hopping within two resonators and the qubits are suppressed in their initial down state. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Accepted version 2020-02-13T05:55:01Z 2020-02-13T05:55:01Z 2018 Journal Article Zheng, F., Zhang, Y., Wang, L., Wei, Y., & Zhao, Y. (2018). Engineering photon delocalization in a Rabi dimer with a dissipative bath. Annalen der Physik, 530(12), 1800351-. doi:10.1002/andp.201800351 0003-3804 https://hdl.handle.net/10356/137032 10.1002/andp.201800351 2-s2.0-85056644468 12 530 en Annalen der Physik This is the peer reviewed version of the following article: Zheng, F., Zhang, Y., Wang, L., Wei, Y., & Zhao, Y. (2018). Engineering photon delocalization in a Rabi dimer with a dissipative bath. Annalen der Physik, 530(12), 1800351-. doi:10.1002/andp.201800351, which has been published in final form at https://doi.org/10.1002/andp.201800351. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics::Atomic physics::Quantum theory
Davydov Ansätze
Photon Delocalization
spellingShingle Science::Physics::Atomic physics::Quantum theory
Davydov Ansätze
Photon Delocalization
Zheng, Fulu
Zhang, Yuyu
Wang, Lu
Wei, Yadong
Zhao, Yang
Engineering photon delocalization in a Rabi dimer with a dissipative bath
description A Rabi dimer is used to model a recently reported circuit quantum electrodynamics system composed of two coupled transmission‐line resonators with each being coupled to one qubit. In this study, a phonon bath is adopted to mimic the multimode micromechanical resonators and is coupled to the qubits in the Rabi dimer. The dynamical behavior of the composite system is studied by the Dirac–Frenkel time‐dependent variational principle combined with the multiple Davydov D2 ansätze. Initially, all the photons are pumped into the left resonator, and the two qubits are in the down state coupled with the phonon vacuum. In the strong qubit–photon coupling regime, the photon dynamics can be engineered by tuning the qubit–bath coupling strength α and photon delocalization is achieved by increasing α. In the absence of dissipation, photons are localized in the initial resonator. Nevertheless, with moderate qubit–bath coupling, photons are delocalized with quasiequilibration of the photon population in two resonators at long times. In this case, high‐frequency bath modes are activated by interacting with depolarized qubits. For strong dissipation, photon delocalization is achieved via frequent photon‐hopping within two resonators and the qubits are suppressed in their initial down state.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Zheng, Fulu
Zhang, Yuyu
Wang, Lu
Wei, Yadong
Zhao, Yang
format Article
author Zheng, Fulu
Zhang, Yuyu
Wang, Lu
Wei, Yadong
Zhao, Yang
author_sort Zheng, Fulu
title Engineering photon delocalization in a Rabi dimer with a dissipative bath
title_short Engineering photon delocalization in a Rabi dimer with a dissipative bath
title_full Engineering photon delocalization in a Rabi dimer with a dissipative bath
title_fullStr Engineering photon delocalization in a Rabi dimer with a dissipative bath
title_full_unstemmed Engineering photon delocalization in a Rabi dimer with a dissipative bath
title_sort engineering photon delocalization in a rabi dimer with a dissipative bath
publishDate 2020
url https://hdl.handle.net/10356/137032
_version_ 1773551395869294592