Decoherence of a Single-Ion Qubit Immersed in a Spin-Polarized Atomic Bath

Year: 2013

Authors: Ratschbacher L., Sias C., Carcagni L., Silver J. M., Zipkes C., Koehl M.

Autors Affiliation: Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB30HE, United Kingdom; Istituto Nazionale di Ottica—CNR and LENS, via Nello Carrara 1, 50019 Sesto Fiorentino, Italy; Physikalisches Institut, University of Bonn, Wegelerstrasse 8, 53115 Bonn, Germany

Abstract: We report on the immersion of a spin qubit encoded in a single trapped ion into a spin-polarized neutral atom environment, which possesses both continuous (motional) and discrete (spin) degrees of freedom. The environment offers the possibility of a precise microscopic description, which allows us to understand dynamics and decoherence from first principles. We observe the spin dynamics of the qubit and measure the decoherence times (T-1 and T-2), which are determined by the spin-exchange interaction as well as by an unexpectedly strong spin-nonconserving coupling mechanism. DOI: 10.1103/PhysRevLett.110.160402


Volume: 110 (16)      Pages from: 160402  to: 160402

More Information: We thank A. Imamoglu and C. Kollath for discussions. The work has been supported by EPSRC (EP/H005676/1), ERC (Grant No. 240335), the Leverhulme Trust (C. S.), the Royal Society, and the Wolfson Foundation.
DOI: 10.1103/PhysRevLett.110.160402

Citations: 63
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