Observation of Scaling in the Dynamics of a Strongly Quenched Quantum Gas
| Autor: | W. Muessel, Moritz Höfer, Jiří Tomkovič, Aisling Johnson, Markus K. Oberthaler, Thomas Gasenzer, Eike Nicklas, Helmut Strobel, Markus Karl |
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| Jazyk: | angličtina |
| Předmět: |
Quenching
Physics Quantum Physics Bose gas Time evolution FOS: Physical sciences General Physics and Astronomy Pattern Formation and Solitons (nlin.PS) Models Theoretical Renormalization group Rubidium Nonlinear Sciences - Pattern Formation and Solitons High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Quantum Gases (cond-mat.quant-gas) Critical point (thermodynamics) Quantum mechanics Quantum critical point Quantum Theory Gases Quantum Physics (quant-ph) Condensed Matter - Quantum Gases Quantum Scaling |
| Zdroj: | Physical Review Letters |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.115.245301 |
| Popis: | We report on the experimental observation of scaling in the time evolution following a sudden quench into the vicinity of a quantum critical point. The experimental system, a two-component Bose gas with coherent exchange between the constituents, allows for the necessary high level of control of parameters as well as the access to time-resolved spatial correlation functions. The theoretical analysis reveals that when quenching the system close to the critical point, the energy introduced by the quench leads to a short-time evolution exhibiting crossover reminiscent of the finite-temperature critical properties in the system's universality class. Observing the time evolution after a quench represents a paradigm shift in accessing and probing experimentally universal properties close to a quantum critical point and allows in a new way benchmarking of quantum many-body theory with experiments. main text: 5 pages, 4 figures; supplementary materials: 5 pages; Revised PRL version |
| Databáze: | OpenAIRE |
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