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Title: Theoretical investigations of quantum walks by cold atoms in a double optical lattice
Authors: Satapathy, Nandan
Hagman, Henning
Zelan, Martin
Kastberg, Anders
Ramachandran, Hema
Issue Date: Jul-2009
Publisher: The American Physical Society
Citation: Physical Review A, 2009, Vol.80, p012302
Abstract: We investigate the feasibility of carrying out quantum walks with cold atoms in a double optical lattice. Monte Carlo simulations of time-of-flight (TOF) detection and absorption imaging were carried out, focusing on a specific experimental implementation. These indicate that absorption imaging would be best suited for detection of quantum walks. With typical experimental parameters a few hundred quantum walk steps will be needed for an unambiguous detection of the quantum walk signature. We show that in special cases, few-step quantum walks can also be detected in our system if one measures the relative population of the atoms in their internal states rather than their displacement in space, that is, measurements are made in the space of the coin operator rather than in that of the displacement operator.
Description: Open Access
ISSN: 1050-2947
1094-1622 (online)
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Copyright: 2009 The American Physical Society
Appears in Collections:Research Papers (LAMP)

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