2014/05/31 by A. S. Parkins, Scott Parkins, Takao Aoki
Computer Science · Engineering · Physics and Astronomy · #Atom (system on chip) #Atom laser #Atomic physics #Cavity quantum electrodynamics #Coupling (piping) #Field (mathematics) #Laser #Laser linewidth #Materials science #Mechanical and Optical Resonators #Open quantum system #Optical fiber #Optics #Photonic and Optical Devices #Physics #Quantum #Quantum Information and Cryptography #Quantum mechanics #Resonator #Single-mode optical fiber #Spontaneous emission #quant-ph
paper · pdf · doi:10.1103/physreva.90.053822
published as Phys. Rev. A 90, 053822 (2014) · 13 pages, 9 figures
openalex publication_date 2014/11/11 · arxiv created 2014/11/21 · arxiv updated 2014/11/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We propose a scheme for single-atom, quantum control of the direction of propagation of a coherent field incident, via a tapered fiber, upon a microtoroidal whispering-gallery-mode (WGM) resonator. The scheme involves overcoupling of the fiber taper to the resonator and strong coupling of an atom to the evanescent field of the WGM, i.e., an atom-field coupling that exceeds the total WGM linewidth. In contrast to previous, related schemes that operate in the bad-cavity regime, the proposed scheme can operate effectively with much stronger incident fields, while also preserving their coherent nature. It can also serve to prepare an entangled state of the atom and coherent optical pulses propagating in opposite directions along the fiber. We evaluate the fidelity of preparation of such a state taking into account absorption and atomic spontaneous emission and demonstrate that high fidelities should be possible with realistic parameters.