Pump-probe spectroscopy of Bose polarons: Dynamical formation and coherence
We propose and investigate a pump-probe spectroscopy scheme to unveil the time-resolved dynamics of fermionic or bosonic impurities immersed in a harmonically trapped Bose-Einstein condensate. In this scheme a pump pulse initially transfers the impurities from a noninteracting to a resonantly intera...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2020-09-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.033380 |
| _version_ | 1797211271643267072 |
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| author | S. I. Mistakidis G. C. Katsimiga G. M. Koutentakis Th. Busch P. Schmelcher |
| author_facet | S. I. Mistakidis G. C. Katsimiga G. M. Koutentakis Th. Busch P. Schmelcher |
| author_sort | S. I. Mistakidis |
| collection | DOAJ |
| description | We propose and investigate a pump-probe spectroscopy scheme to unveil the time-resolved dynamics of fermionic or bosonic impurities immersed in a harmonically trapped Bose-Einstein condensate. In this scheme a pump pulse initially transfers the impurities from a noninteracting to a resonantly interacting spin state and, after a finite time in which the system evolves freely, the probe pulse reverses this transition. This directly allows us to monitor the nonequilibrium dynamics of the impurities as the dynamical formation of coherent attractive or repulsive Bose polarons and signatures of their induced interactions are imprinted in the probe spectra. We show that for interspecies repulsions exceeding the intraspecies ones a temporal orthogonality catastrophe occurs, followed by enhanced energy redistribution processes, independently of the impurity's flavor. This phenomenon takes place over the characteristic trap timescales. For much longer timescales a steady state is reached characterized by substantial losses of coherence of the impurities. This steady state is related to eigenstate thermalization and it is demonstrated to be independent of the system's characteristics. |
| first_indexed | 2024-04-24T10:23:50Z |
| format | Article |
| id | doaj.art-7ae38cff8346450a92fda7b6b5a4b56f |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:23:50Z |
| publishDate | 2020-09-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-7ae38cff8346450a92fda7b6b5a4b56f2024-04-12T17:00:14ZengAmerican Physical SocietyPhysical Review Research2643-15642020-09-012303338010.1103/PhysRevResearch.2.033380Pump-probe spectroscopy of Bose polarons: Dynamical formation and coherenceS. I. MistakidisG. C. KatsimigaG. M. KoutentakisTh. BuschP. SchmelcherWe propose and investigate a pump-probe spectroscopy scheme to unveil the time-resolved dynamics of fermionic or bosonic impurities immersed in a harmonically trapped Bose-Einstein condensate. In this scheme a pump pulse initially transfers the impurities from a noninteracting to a resonantly interacting spin state and, after a finite time in which the system evolves freely, the probe pulse reverses this transition. This directly allows us to monitor the nonequilibrium dynamics of the impurities as the dynamical formation of coherent attractive or repulsive Bose polarons and signatures of their induced interactions are imprinted in the probe spectra. We show that for interspecies repulsions exceeding the intraspecies ones a temporal orthogonality catastrophe occurs, followed by enhanced energy redistribution processes, independently of the impurity's flavor. This phenomenon takes place over the characteristic trap timescales. For much longer timescales a steady state is reached characterized by substantial losses of coherence of the impurities. This steady state is related to eigenstate thermalization and it is demonstrated to be independent of the system's characteristics.http://doi.org/10.1103/PhysRevResearch.2.033380 |
| spellingShingle | S. I. Mistakidis G. C. Katsimiga G. M. Koutentakis Th. Busch P. Schmelcher Pump-probe spectroscopy of Bose polarons: Dynamical formation and coherence Physical Review Research |
| title | Pump-probe spectroscopy of Bose polarons: Dynamical formation and coherence |
| title_full | Pump-probe spectroscopy of Bose polarons: Dynamical formation and coherence |
| title_fullStr | Pump-probe spectroscopy of Bose polarons: Dynamical formation and coherence |
| title_full_unstemmed | Pump-probe spectroscopy of Bose polarons: Dynamical formation and coherence |
| title_short | Pump-probe spectroscopy of Bose polarons: Dynamical formation and coherence |
| title_sort | pump probe spectroscopy of bose polarons dynamical formation and coherence |
| url | http://doi.org/10.1103/PhysRevResearch.2.033380 |
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