期刊
PHYSICS LETTERS A
卷 374, 期 1, 页码 34-39出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2009.10.026
关键词
Weak measurement; Weak value; Cold trapped ion; Product observable
资金
- NNSF of China [10604051]
- CAS
- National Fundamental Research Program
We derive schemes to measure the so-called weak values of quantum system observables by coupling of the system to a qubit meter system. We highlight, in particular, the meaning of the imaginary part of the weak values, and show how it can be measured directly on equal footing with the real part of the weak value. We present compact expressions for the weak value of single qubit observables and of product observables on qubit pairs. Experimental studies of the results are suggested with cold trapped ions. (C) 2009 Elsevier B.V. All rights reserved.
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