Measuring the dynamic structure factor of a quantum gas undergoing a structural phase transition
| LEADER | caa a22 4500 | ||
|---|---|---|---|
| 001 | 52878580X | ||
| 005 | 20190713030955.0 | ||
| 007 | cr unu---uuuuu | ||
| 008 | 180924s2015 xx s 000 0 eng | ||
| 024 | 7 | 0 | |a 10.3929/ethz-b-000101960 |2 doi |
| 024 | 7 | 0 | |a 10.1038/ncomms8046 |2 doi |
| 035 | |a (ETHRESEARCH)oai:www.research-collecti.ethz.ch:20.500.11850/101960 | ||
| 245 | 0 | 0 | |a Measuring the dynamic structure factor of a quantum gas undergoing a structural phase transition |h [Elektronische Daten] |c [Renate Landig, Ferdinand Brennecke, Rafael Mottl, Tobias Ulrik; id_orcid 0000-0001-7016-587X Donner, Tilman Esslinger] |
| 246 | 0 | |a Nat Commun | |
| 506 | |a Open access |2 ethresearch | ||
| 520 | 3 | |a The dynamic structure factor is a central quantity describing the physics of quantum many-body systems, capturing structure and collective excitations of a material. In condensed matter, it can be measured via inelastic neutron scattering, which is an energy-resolving probe for the density fluctuations. In ultracold atoms, a similar approach could so far not be applied because of the diluteness of the system. Here we report on a direct, real-time and nondestructive measurement of the dynamic structure factor of a quantum gas exhibiting cavity-mediated long-range interactions. The technique relies on inelastic scattering of photons, stimulated by the enhanced vacuum field inside a high finesse optical cavity. We extract the density fluctuations, their energy and lifetime while the system undergoes a structural phase transition. We observe an occupation of the relevant quasi-particle mode on the level of a few excitations, and provide a theoretical description of this dissipative quantum many-body system. | |
| 540 | |a Creative Commons Attribution 4.0 International |u http://creativecommons.org/licenses/by/4.0 |2 ethresearch | ||
| 700 | 1 | |a Landig |D Renate |e joint author | |
| 700 | 1 | |a Brennecke |D Ferdinand |e joint author | |
| 700 | 1 | |a Mottl |D Rafael |e joint author | |
| 700 | 1 | |a Donner |D Tobias Ulrik; id_orcid 0000-0001-7016-587X |e joint author | |
| 700 | 1 | |a Esslinger |D Tilman |e joint author | |
| 773 | 0 | |t Nature Communications |d London : Nature Publishing Group |g 6, p. 7046 |x 2041-1723 | |
| 856 | 4 | 0 | |u http://hdl.handle.net/20.500.11850/101960 |q text/html |z WWW-Backlink auf das Repository (Open access) |
| 908 | |D 1 |a Journal Article |2 ethresearch | ||
| 950 | |B ETHRESEARCH |P 856 |E 40 |u http://hdl.handle.net/20.500.11850/101960 |q text/html |z WWW-Backlink auf das Repository (Open access) | ||
| 950 | |B ETHRESEARCH |P 700 |E 1- |a Landig |D Renate |e joint author | ||
| 950 | |B ETHRESEARCH |P 700 |E 1- |a Brennecke |D Ferdinand |e joint author | ||
| 950 | |B ETHRESEARCH |P 700 |E 1- |a Mottl |D Rafael |e joint author | ||
| 950 | |B ETHRESEARCH |P 700 |E 1- |a Donner |D Tobias Ulrik; id_orcid 0000-0001-7016-587X |e joint author | ||
| 950 | |B ETHRESEARCH |P 700 |E 1- |a Esslinger |D Tilman |e joint author | ||
| 950 | |B ETHRESEARCH |P 773 |E 0- |t Nature Communications |d London : Nature Publishing Group |g 6, p. 7046 |x 2041-1723 | ||
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 949 | |B ETHRESEARCH |F ETHRESEARCH |b ETHRESEARCH |j Journal Article |c Open access | ||