Dephasing–rephasing dynamics of one-dimensional tunneling quasicondensates
We study the quantum tunneling of two one-dimensional quasi-condensates made of alkali-metal atoms, considering two different tunneling configurations: side-by-side and head-to-tail. After deriving the quasiparticle excitation spectrum, we discuss the dynamics of the relative phase following a sudde...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2020-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ab965d |
| _version_ | 1797750189438533632 |
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| author | A Tononi F Toigo S Wimberger A Cappellaro L Salasnich |
| author_facet | A Tononi F Toigo S Wimberger A Cappellaro L Salasnich |
| author_sort | A Tononi |
| collection | DOAJ |
| description | We study the quantum tunneling of two one-dimensional quasi-condensates made of alkali-metal atoms, considering two different tunneling configurations: side-by-side and head-to-tail. After deriving the quasiparticle excitation spectrum, we discuss the dynamics of the relative phase following a sudden coupling of the independent subsystems. In particular, we calculate the coherence factor of the system, which, due to the nonzero tunneling amplitude, it exhibits dephasing–rephasing oscillations instead of pure dephasing. These oscillations are enhanced by a higher tunneling energy, and by higher system densities. Our predictions provide a benchmark for future experiments at temperatures below T ≲ 5 nK. |
| first_indexed | 2024-03-12T16:30:08Z |
| format | Article |
| id | doaj.art-0dba1954f62a4ad3a66c59f288009413 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:30:08Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-0dba1954f62a4ad3a66c59f2880094132023-08-08T15:32:26ZengIOP PublishingNew Journal of Physics1367-26302020-01-0122707302010.1088/1367-2630/ab965dDephasing–rephasing dynamics of one-dimensional tunneling quasicondensatesA Tononi0https://orcid.org/0000-0002-0023-3977F Toigo1S Wimberger2https://orcid.org/0000-0002-8433-1733A Cappellaro3https://orcid.org/0000-0001-6110-2359L Salasnich4https://orcid.org/0000-0003-0817-4753Dipartimento di Fisica e Astronomia ‘Galileo Galilei’, Università di Padova , via Marzolo 8, 35131 Padova, ItalyDipartimento di Fisica e Astronomia ‘Galileo Galilei’, Università di Padova , via Marzolo 8, 35131 Padova, ItalyDipartimento di Scienze Matematiche, Fisiche ed Informatiche, Università di Parma , Parco Area delle Scienze 7/A, 43124 Parma, Italy; INFN , Sezione di Milano Bicocca, Gruppo Collegato di Parma, Parma, ItalyDipartimento di Fisica e Astronomia ‘Galileo Galilei’, Università di Padova , via Marzolo 8, 35131 Padova, ItalyDipartimento di Fisica e Astronomia ‘Galileo Galilei’, Università di Padova , via Marzolo 8, 35131 Padova, ItalyWe study the quantum tunneling of two one-dimensional quasi-condensates made of alkali-metal atoms, considering two different tunneling configurations: side-by-side and head-to-tail. After deriving the quasiparticle excitation spectrum, we discuss the dynamics of the relative phase following a sudden coupling of the independent subsystems. In particular, we calculate the coherence factor of the system, which, due to the nonzero tunneling amplitude, it exhibits dephasing–rephasing oscillations instead of pure dephasing. These oscillations are enhanced by a higher tunneling energy, and by higher system densities. Our predictions provide a benchmark for future experiments at temperatures below T ≲ 5 nK.https://doi.org/10.1088/1367-2630/ab965dBose–Einstein condensationdephasingrephasingone-dimensionalJosephson tunneling |
| spellingShingle | A Tononi F Toigo S Wimberger A Cappellaro L Salasnich Dephasing–rephasing dynamics of one-dimensional tunneling quasicondensates New Journal of Physics Bose–Einstein condensation dephasing rephasing one-dimensional Josephson tunneling |
| title | Dephasing–rephasing dynamics of one-dimensional tunneling quasicondensates |
| title_full | Dephasing–rephasing dynamics of one-dimensional tunneling quasicondensates |
| title_fullStr | Dephasing–rephasing dynamics of one-dimensional tunneling quasicondensates |
| title_full_unstemmed | Dephasing–rephasing dynamics of one-dimensional tunneling quasicondensates |
| title_short | Dephasing–rephasing dynamics of one-dimensional tunneling quasicondensates |
| title_sort | dephasing rephasing dynamics of one dimensional tunneling quasicondensates |
| topic | Bose–Einstein condensation dephasing rephasing one-dimensional Josephson tunneling |
| url | https://doi.org/10.1088/1367-2630/ab965d |
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