Fate of the Amplitude Mode in a Trapped Dipolar Supersolid
We theoretically investigate the spectrum of elementary excitations of a trapped dipolar quantum gas across the BEC-supersolid phase transition. Our calculations reveal the existence of distinct Higgs amplitude and Nambu-Goldstone modes that emerge from the softening roton modes of the dipolar BEC a...
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| Veröffentlicht in: | Physical review letters 2019-11, Vol.123 (19), p.193002-193002, Article 193002 |
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| container_end_page | 193002 |
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| container_issue | 19 |
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| container_title | Physical review letters |
| container_volume | 123 |
| creator | Hertkorn, J. Böttcher, F. Guo, M. Schmidt, J. N. Langen, T. Büchler, H. P. Pfau, T. |
| description | We theoretically investigate the spectrum of elementary excitations of a trapped dipolar quantum gas across the BEC-supersolid phase transition. Our calculations reveal the existence of distinct Higgs amplitude and Nambu-Goldstone modes that emerge from the softening roton modes of the dipolar BEC at the phase transition point. On the supersolid side of the transition, the energy of the Higgs amplitude mode increases rapidly, leading to a strong coupling to higher-lying modes. Our Letter highlights how the symmetry-breaking nature of the supersolid state translates to finite-size systems. |
| doi_str_mv | 10.1103/PhysRevLett.123.193002 |
| format | Article |
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| fulltext | fulltext |
| identifier | ISSN: 0031-9007 |
| ispartof | Physical review letters, 2019-11, Vol.123 (19), p.193002-193002, Article 193002 |
| issn | 0031-9007 1079-7114 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_2318733900 |
| source | American Physical Society Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Amplitudes Broken symmetry Elementary excitations Excitation spectra Helium Phase transitions Transition points |
| title | Fate of the Amplitude Mode in a Trapped Dipolar Supersolid |
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