Single-site addressing of ultracold atoms beyond the diffraction limit via position-dependent adiabatic passage
Viscor, Daniel (Universitat Autònoma de Barcelona. Departament de Física)
Rubio López, Juan Luis (Universitat Autònoma de Barcelona. Departament de Física)
Birkl, Gerhard (Universität Darmstadt. Institut für Angewandte Physik, Technische)
Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física)
Ahufinger, Verònica (Universitat Autònoma de Barcelona. Departament de Física)
American Physical Society

Data:	2012
Resum:	We propose a single-site addressing implementation based on the subwavelength localization via adiabatic passage (SLAP) technique. We consider a sample of ultracold neutral atoms loaded into a two-dimensional optical lattice with one atom per site. Each atom is modeled by a three-level Λ system in interaction with a pump and a Stokes laser pulse. Using a pump field with a node in its spatial profile, the atoms at all sites are transferred from one ground state of the system to the other via stimulated Raman adiabatic passage, except the one at the position of the node that remains in the initial ground state. This technique allows for the preparation, manipulation, and detection of atoms with a spatial resolution better than the diffraction limit, which either relaxes the requirements on the optical setup used or extends the achievable spatial resolution to lattice spacings smaller than accessible to date. In comparison to techniques based on coherent population trapping, SLAP gives a higher addressing resolution and has additional advantages such as robustness against parameter variations, coherence of the transfer process, and the absence of photon induced recoil. Additionally, the advantages of our proposal with respect to adiabatic spin-flip techniques are highlighted. Analytic expressions for the achievable addressing resolution and efficiency are derived and compared to numerical simulations for 87Rb atoms in state-of-the-art optical lattices.
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	Physical review. A, Vol. 86, Issue 6 (December 2012) , p. 063409-1-063409-7, ISSN 1050-2947

DOI: 10.1103/PhysRevA.86.063409

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