Emission spectral non-Markovianity in qubit-cavity systems in the ultrastrong coupling regime
We study the emission spectra of the dissipative Rabi and Jaynes-Cummings models in the non-Markovian and ultrastrong coupling regimes. We have derived a polaron-transformed Nakajima-Zwanzig master equation (PTNZE) to calculate the emission spectra, which eliminates the well-known limitations of the...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Online Access: | https://hdl.handle.net/10356/165617 |
| _version_ | 1826110972516892672 |
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| author | Zhang, Chenyi Yu, Minghong Yan, Yiying Chen, Lipeng Lü, Zhiguo Zhao, Yang |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Zhang, Chenyi Yu, Minghong Yan, Yiying Chen, Lipeng Lü, Zhiguo Zhao, Yang |
| author_sort | Zhang, Chenyi |
| collection | NTU |
| description | We study the emission spectra of the dissipative Rabi and Jaynes-Cummings models in the non-Markovian and ultrastrong coupling regimes. We have derived a polaron-transformed Nakajima-Zwanzig master equation (PTNZE) to calculate the emission spectra, which eliminates the well-known limitations of the Markovian approximation and the standard second-order perturbation. Using the time-dependent variational approach with the multiple Davydov ansatz as a benchmark, the PTNZE is found to yield accurate emission spectra in certain ultrastrong coupling regimes where the standard second-order Nakajima-Zwanzig master equation breaks down. It is shown that the emission spectra of the dissipative Rabi and Jaynes-Cummings models are, in general, asymmetric under various initial conditions. Direct comparisons of spectra for the two models illustrate the essential role of the qubit-cavity counter-rotating term and the spectral features under different qubit-cavity coupling strengths and system initial conditions. |
| first_indexed | 2024-10-01T02:43:18Z |
| format | Journal Article |
| id | ntu-10356/165617 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:43:18Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1656172023-07-14T15:45:05Z Emission spectral non-Markovianity in qubit-cavity systems in the ultrastrong coupling regime Zhang, Chenyi Yu, Minghong Yan, Yiying Chen, Lipeng Lü, Zhiguo Zhao, Yang School of Materials Science and Engineering Engineering::Materials Cavity System Emission Spectral We study the emission spectra of the dissipative Rabi and Jaynes-Cummings models in the non-Markovian and ultrastrong coupling regimes. We have derived a polaron-transformed Nakajima-Zwanzig master equation (PTNZE) to calculate the emission spectra, which eliminates the well-known limitations of the Markovian approximation and the standard second-order perturbation. Using the time-dependent variational approach with the multiple Davydov ansatz as a benchmark, the PTNZE is found to yield accurate emission spectra in certain ultrastrong coupling regimes where the standard second-order Nakajima-Zwanzig master equation breaks down. It is shown that the emission spectra of the dissipative Rabi and Jaynes-Cummings models are, in general, asymmetric under various initial conditions. Direct comparisons of spectra for the two models illustrate the essential role of the qubit-cavity counter-rotating term and the spectral features under different qubit-cavity coupling strengths and system initial conditions. Ministry of Education (MOE) Published version Support from the National Natural Science Foundation of China (Grant Nos. 12005188 and 11774226) and the Singapore Ministry of Education Academic Research Fund Tier 1 (Grant No. RG87/20) is gratefully acknowledged. 2023-04-04T02:23:52Z 2023-04-04T02:23:52Z 2022 Journal Article Zhang, C., Yu, M., Yan, Y., Chen, L., Lü, Z. & Zhao, Y. (2022). Emission spectral non-Markovianity in qubit-cavity systems in the ultrastrong coupling regime. The Journal of Chemical Physics, 157(21), 214116-. https://dx.doi.org/10.1063/5.0123871 0021-9606 https://hdl.handle.net/10356/165617 10.1063/5.0123871 36511538 2-s2.0-85143993261 21 157 214116 en RG87/20 The Journal of Chemical Physics © 2022 Author(s). All rights reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Zhang, C., Yu, M., Yan, Y., Chen, L., Lü, Z. & Zhao, Y. (2022). Emission spectral non-Markovianity in qubit-cavity systems in the ultrastrong coupling regime. The Journal of Chemical Physics, 157(21), 214116- and may be found at https://dx.doi.org/10.1063/5.0123871. application/pdf |
| spellingShingle | Engineering::Materials Cavity System Emission Spectral Zhang, Chenyi Yu, Minghong Yan, Yiying Chen, Lipeng Lü, Zhiguo Zhao, Yang Emission spectral non-Markovianity in qubit-cavity systems in the ultrastrong coupling regime |
| title | Emission spectral non-Markovianity in qubit-cavity systems in the ultrastrong coupling regime |
| title_full | Emission spectral non-Markovianity in qubit-cavity systems in the ultrastrong coupling regime |
| title_fullStr | Emission spectral non-Markovianity in qubit-cavity systems in the ultrastrong coupling regime |
| title_full_unstemmed | Emission spectral non-Markovianity in qubit-cavity systems in the ultrastrong coupling regime |
| title_short | Emission spectral non-Markovianity in qubit-cavity systems in the ultrastrong coupling regime |
| title_sort | emission spectral non markovianity in qubit cavity systems in the ultrastrong coupling regime |
| topic | Engineering::Materials Cavity System Emission Spectral |
| url | https://hdl.handle.net/10356/165617 |
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