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

被引：71
作者：
Ratschbacher, L. [1 ]
Sias, C. [1 ,2 ,3 ]
Carcagni, L. [1 ]
Silver, J. M. [1 ]
Zipkes, C. [1 ]
Koehl, M. [1 ,4 ]
机构：
[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[2] CNR, Ist Nazl Ott, I-50019 Sesto Fiorentino, Italy
[3] LENS, I-50019 Sesto Fiorentino, Italy
[4] Univ Bonn, Inst Phys, D-53115 Bonn, Germany
来源：
PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 16期
基金：
英国工程与自然科学研究理事会; 欧洲研究理事会;
关键词：
RELAXATION; DYNAMICS; POLARONS; SYSTEM;
D O I：
10.1103/PhysRevLett.110.160402
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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
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页数：5
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