Dynamical density wave order in an atom–cavity system
We theoretically and experimentally explore the emergence of a dynamical density wave (DW) order in a driven dissipative atom–cavity system. A Bose–Einstein condensate is placed inside a high finesse optical resonator and pumped sideways by an optical standing wave. The pump strength is chosen to in...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2021-01-01
|
| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/abdf9c |
| _version_ | 1797750320885923840 |
|---|---|
| author | Christoph Georges Jayson G Cosme Hans Keßler Ludwig Mathey Andreas Hemmerich |
| author_facet | Christoph Georges Jayson G Cosme Hans Keßler Ludwig Mathey Andreas Hemmerich |
| author_sort | Christoph Georges |
| collection | DOAJ |
| description | We theoretically and experimentally explore the emergence of a dynamical density wave (DW) order in a driven dissipative atom–cavity system. A Bose–Einstein condensate is placed inside a high finesse optical resonator and pumped sideways by an optical standing wave. The pump strength is chosen to induce a stationary superradiant checkerboard DW order of the atoms stabilized by a strong intracavity light field. We show theoretically that, when the pump is modulated with sufficient strength at a frequency ω _d close to a systemic resonance frequency ω _> , a dynamical DW order emerges, which oscillates at the two frequencies ω _> and ω _< = ω _d − ω _> . This order is associated with a characteristic momentum spectrum, also found in experiments in addition to remnants of the oscillatory dynamics presumably damped by on-site interaction and heating, not included in the calculations. The oscillating density grating, associated with this order, suppresses pump-induced light scattering into the cavity. Similar mechanisms might be conceivable in light-driven electronic matter. |
| first_indexed | 2024-03-12T16:31:01Z |
| format | Article |
| id | doaj.art-fb11cd63d6e54bb0982851fb55391129 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:31:01Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-fb11cd63d6e54bb0982851fb553911292023-08-08T15:30:52ZengIOP PublishingNew Journal of Physics1367-26302021-01-0123202300310.1088/1367-2630/abdf9cDynamical density wave order in an atom–cavity systemChristoph Georges0Jayson G Cosme1Hans Keßler2Ludwig Mathey3Andreas Hemmerich4Zentrum für Optische Quantentechnologien and Institut für Laser-Physik, Universität Hamburg , 22761 Hamburg, GermanyZentrum für Optische Quantentechnologien and Institut für Laser-Physik, Universität Hamburg , 22761 Hamburg, Germany; The Hamburg Center for Ultrafast Imaging , Luruper Chaussee 149, Hamburg 22761, Germany; National Institute of Physics, University of the Philippines , Diliman, Quezon City 1101, PhilippinesZentrum für Optische Quantentechnologien and Institut für Laser-Physik, Universität Hamburg , 22761 Hamburg, Germany; The Hamburg Center for Ultrafast Imaging , Luruper Chaussee 149, Hamburg 22761, GermanyZentrum für Optische Quantentechnologien and Institut für Laser-Physik, Universität Hamburg , 22761 Hamburg, Germany; The Hamburg Center for Ultrafast Imaging , Luruper Chaussee 149, Hamburg 22761, GermanyZentrum für Optische Quantentechnologien and Institut für Laser-Physik, Universität Hamburg , 22761 Hamburg, Germany; The Hamburg Center for Ultrafast Imaging , Luruper Chaussee 149, Hamburg 22761, GermanyWe theoretically and experimentally explore the emergence of a dynamical density wave (DW) order in a driven dissipative atom–cavity system. A Bose–Einstein condensate is placed inside a high finesse optical resonator and pumped sideways by an optical standing wave. The pump strength is chosen to induce a stationary superradiant checkerboard DW order of the atoms stabilized by a strong intracavity light field. We show theoretically that, when the pump is modulated with sufficient strength at a frequency ω _d close to a systemic resonance frequency ω _> , a dynamical DW order emerges, which oscillates at the two frequencies ω _> and ω _< = ω _d − ω _> . This order is associated with a characteristic momentum spectrum, also found in experiments in addition to remnants of the oscillatory dynamics presumably damped by on-site interaction and heating, not included in the calculations. The oscillating density grating, associated with this order, suppresses pump-induced light scattering into the cavity. Similar mechanisms might be conceivable in light-driven electronic matter.https://doi.org/10.1088/1367-2630/abdf9cquantum gasescavity QEDoptomechanicsnon-equilibrium dynamics |
| spellingShingle | Christoph Georges Jayson G Cosme Hans Keßler Ludwig Mathey Andreas Hemmerich Dynamical density wave order in an atom–cavity system New Journal of Physics quantum gases cavity QED optomechanics non-equilibrium dynamics |
| title | Dynamical density wave order in an atom–cavity system |
| title_full | Dynamical density wave order in an atom–cavity system |
| title_fullStr | Dynamical density wave order in an atom–cavity system |
| title_full_unstemmed | Dynamical density wave order in an atom–cavity system |
| title_short | Dynamical density wave order in an atom–cavity system |
| title_sort | dynamical density wave order in an atom cavity system |
| topic | quantum gases cavity QED optomechanics non-equilibrium dynamics |
| url | https://doi.org/10.1088/1367-2630/abdf9c |
| work_keys_str_mv | AT christophgeorges dynamicaldensitywaveorderinanatomcavitysystem AT jaysongcosme dynamicaldensitywaveorderinanatomcavitysystem AT hanskeßler dynamicaldensitywaveorderinanatomcavitysystem AT ludwigmathey dynamicaldensitywaveorderinanatomcavitysystem AT andreashemmerich dynamicaldensitywaveorderinanatomcavitysystem |