2018/12/31 by Karol Gietka, Farokh Mivehvar, Helmut Ritsch · 2 citations
Computer Science · Physics and Astronomy · #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Degenerate energy levels #Electromagnetic field #Gravimeter #Interferometry #Mechanical and Optical Resonators #Optics #Phase (matter) #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum mechanics #Ultracold atom #cond-mat.quant-gas #quant-ph
paper · pdf · doi:10.1103/physrevlett.122.190801
published as Phys. Rev. Lett. 122, 190801 (2019) · accepted PRL version (referees' comments incorporated)
arxiv created 2019/04/16 · openalex publication_date 2019/05/13 · arxiv updated 2019/05/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We propose a novel type of composite light-matter interferometer based on a supersolidlike phase of a driven Bose-Einstein condensate coupled to a pair of degenerate counterpropagating electromagnetic modes of an optical ring cavity. The supersolidlike condensate under the influence of the gravity drags the cavity optical potential with itself, thereby changing the relative phase of the two cavity electromagnetic fields. Monitoring the phase evolution of the cavity output fields thus allows for a nondestructive measurement of the gravitational acceleration. We show that the sensitivity of the proposed gravimeter exhibits Heisenberg-like scaling with respect to the atom number. As the relative phase of the cavity fields is insensitive to photon losses, the gravimeter is robust against these deleterious effects. For state-of-the-art experimental parameters, the relative sensitivity Δg/g of such a gravimeter could be of the order of 10-10-10-8 for a condensate of a half a million atoms and interrogation time of the order of a few seconds.