SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 9: Quantum Gases: Bosons I
Q 9.3: Vortrag
Montag, 6. März 2023, 17:45–18:00, A320
Observation of a continous time crystal — •Hans Keßler1, Phatthamon Kongkhambut1, Jim Skulte1, Evgenii Gadylshin1, Ludwig Mathey1, Jayson G. Cosme2, and Andreas Hemmerich1 — 1Zentrum für Optische Quantentechnologien and Institut für Laser-Physik, Universität Hamburg, 22761 Hamburg, Germany. — 2National Institute of Physics, University of the Philippines, Diliman, Quezon City 1101, Philippines.
Time crystals are classified as discrete or continuous depending on whether they spontaneously break discrete or continuous time translation symmetry. While discrete time crystals have been extensively studied in periodically driven systems since their recent discovery, the experimental realisation of a continuous time crystal [1] is still pending. We report the observation of a limit cycle phase in a continuously pumped dissipative atom-cavity system [2], which is characterized by emergent oscillations in the intracavity photon number. We observe that the phase of this oscillation is random for different realisations, and hence this dynamical many-body state breaks continuous time translation symmetry spontaneously. The observed robustness of the limit cycles against temporal perturbations confirms the realisation of a continuous time crystal.
[1] H. Keßler et al., Emergent limit cycles and time crystal dynamics in an atom-cavity system, PRA, 99(5), 053605 (2019)
[2] P. Kongkhambut et al., Observation of a continuous time crystal, Science 307, 6606, 670-673 (2022)