Mainz 2017 – scientific programme
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A: Fachverband Atomphysik
A 20: Poster Session I
A 20.8: Poster
Tuesday, March 7, 2017, 17:00–19:00, P OG1
Commensurate-incommensurate transition in optical cavities — •Andreas Alexander Buchheit1, Haggai Landa2, Cecilia Cormick3, Thomas Fogarty4, Vladimir Stojanovic5, Eugene Demler5, and Giovanna Morigi1 — 1Universität des Saarlandes, D-66123 Saarbrücken, Germany — 2LPTMS, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, France — 3IFEG, CONICET and Universidad Nacional de Cordoba — 4Okinawa Institute of Science and Technology, Japan, — 5Department of Physics, Harvard University, Cambridge, MA 02138, USA
In this work we report on the optomechanical dynamics of chains of trapped ions, which couple to the high-Q mode of an optical standing-wave cavity. Their dynamics results from the interplay between the trapping potential, long-range Coulomb repulsion and the cavity-induced interactions. The latter are due to multiple scatterings of laser photons inside the cavity and become relevant when the laser pump is sufficiently strong to overcome photon decay. We study the stationary states of the ions as a function of the cavity and laser parameters, when the typical length scales of the two self-organizing processes, Coulomb crystallization and photon-mediated interactions, are almost commensurate. We analyze the phase diagram as a function of the ratio between the two wavelengths and recover the commensurate-incommensurate transition when cavity backaction can be neglected. We discuss the features of the emerging phases and analyse how they can be detected in the radiation emitted by the cavity.