Laser-cooled atoms in a high-finesse optical cavity are a powerful tool for quantum simulation and quantum sensing. The optical-cavity enhances the light-matter interaction, allowing effective atom-atom interactions and probing of the quantum state below the mean-field level. In this talk, I will provide an overview of my group’s recent work in this area. We perform cavity-enhanced quantum non-demolition measurements to create highly-entangled states [1], with the recent realization of a squeezed matter wave interferometer for inertial sensing [2]. We have also now observed cavity-mediated momentum-exchange interactions that give rise to a collective recoil mechanism with analogies to Mössbauer spectroscopy for suppressing Doppler dephasing. In a separate system, we have realized a cavity-mediated spin-exchange mechanism [3] and explored a dynamical phase transition [4]. We have most recently simulated the long-predicted dynamical phases of a BCS superconductor [5]. If time permits, I will also briefly touch on the development of a superradiant laser utilizing a mHz linewidth optical transition [6] with applications for ultranarrow linewidth lasers [7] and searches for new physics.
[1] Cox, K.C. et al, Phys. Rev. Lett. 116(9), p.093602 (2016).
[2] Greve G.P., Luo C. et al, Nature, 610(7932), pp.472-477 (2022).
[3] Norcia, M.A. et al, Science, 361(6399), pp.259-262 (2018).
[4] Muniz, J.A. et al, Nature, 580(7805), pp.602-607 (2020).
[5] Lewis-Swan, R.J. et al, Phys. Rev. Lett., 126(17), p.173601 (2021).
[6] Norcia, M.A. et al, Science Advances, 2(10), p.e1601231 (2016).
[7] Norcia, M.A. et al, Phys. Rev. X, 8(2), p.021036 (2018).
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Zoom data, for the entire semester:
https://us02web.zoom.us/j/81663533633?pwd=Z0lCQ3JyRURvRktVOThhWGRsL3lwZz09
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SFB925/ ZOQ