Self-synchronization and dissipation-induced threshold in collective atomic recoil lasing |
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Authors: | von Cube C Slama S Kruse D Zimmermann C Courteille Ph W Robb G R M Piovella N Bonifacio R |
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Affiliation: | Physikalisches Institut, Eberhard-Karls-Universit?t Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen, Germany. |
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Abstract: | Networks of globally coupled oscillators exhibit phase transitions from incoherent to coherent states. Atoms interacting with the counterpropagating modes of a unidirectionally pumped high-finesse ring cavity form such a globally coupled network. The coupling mechanism is provided by collective atomic recoil lasing, i.e., cooperative Bragg scattering of laser light at an atomic density grating, which is self-induced by the laser light. Under the rule of an additional friction force, the atomic ensemble is expected to undergo a phase transition to a state of synchronized atomic motion. We present the experimental investigation of this phase transition by studying the threshold behavior of this lasing process. |
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