All optical Bose-Einstein condensates in a non-degenerate cavity

Grigor Kuyumjyan

D. Naik, Grigor Kuyumjyan, D Pandey +2 more

Abstract Although quantum-degenerate gases of neutral atoms have shown remarkable progress in the study of many-body quantum physics, condensed matter physics, precision measurements, and quantum information processing, experimental progress is needed in order to reach their full potential in these fields. More complex spatial geometries as well as novel methods for engineering interesting interactions have to be developed. Here we demonstrate a novel experimental platform for the realization of quantum-degenerate gases with a wide range of tunability in the spatial geometries experienced by the atoms and with the possibility of non-trivial long-range interactions both within and between multiple 87 Rb Bose–Einstein condensates (BECs). We explore the use of a large mode-volume bow-tie ring cavity resonant at two wavelengths, λ = 1560 and 780 nm, for the creation of multiple BECs within a Malleable optical trap which also possesses the ability of photon-mediated long-range interactions. By exciting diverse transverse modes at 1560 nm, we can realize many optical trapping geometries which can open the door to spatial quantum state engineering with cavity-coupled BECs. As representative examples we realize a BEC in the TEM 00 mode and a double BEC in the TEM 01 mode of the cavity. By controlling the power between the fundamental and the higher transverse cavity mode, splitting and merging of cold thermal atomic ensemble is shown as well as the potential of creating more complex trapping geometries such as uniform potentials. Due to the double resonance of the cavity, we can envision a quantum network of BECs coupled via cavity-mediated interactions in non-trivial geometries.

Michael Chapman

Aranya B. Bhattacherjee, Tarun Kumar

The Bose Statistics were first predicted by the Indian Physicist Satyendra Nath Bose in 1924. Later in 1925, Einstein extended the work of Bose to non-interacting particles.The resulting statistics that came out of the work of Bose and Einstein is known as Bose-Einstein Statistics. It took researchers and scientists nearly 70 years to create the first Bose-Einstein Condensate in the laboratory in 1995. Ever since the discovery of BEC, research in this field has flourished very rapidly both theoretically and experimentally. Discovery of BEC has initiated some new topics such as atom optics, atom interferometry, quantum computation, Cavity Quantum Electrodynamics of BEC, precision measurement, low dimensional physics etc.This book explores some of the exciting new developments in a field, which combines Bose-Einstein Condensates and Optical cavities.Particularly, we show how the transmission spectroscopy can be utilized to measure the properties of the BEC in the optical cavity.

D. Nagy, Gergely Szirmai, P. Domokos

Antoine Browaeys, J. V. Porto, S P. Peil +3 more