Multiple-measurement Leggett-Garg inequalities
Source: Phys. Rev. A 80, 034102 (2009); doi:10.1103/PhysRevA.80.034102
Published 18 September 2009
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In the investigation of the quantum to classical transition, the Leggett-Garg inequality represents what Bell's inequality is for the study of entanglement and nonlocality: a definite quantitative test showing the inadequacy of familiar lines of thought in interpreting quantum phenomena. Here we discuss the generalization of the Leggett-Garg inequality to an arbitrary number of measurements in the perspective of its use as a tool for characterizing nondestructive measurement devices.
©2009 The American Physical Society
| History: | Received 4 August 2009; published 18 September 2009 |
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http://link.aps.org/abstract/PRA/v80/e034102 |
REFERENCES (20)
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- W. H. Zurek, Rev. Mod. Phys. 75, 715 (2003).
- G. C. Ghirardi, A. Rimini, and T. Weber, Phys. Rev. D 34, 470 (1986).
- J. Kofler and Č. Brukner, Phys. Rev. Lett. 99, 180403 (2007).
- A. J. Leggett and A. Garg, Phys. Rev. Lett. 54, 857 (1985).
- A. N. Jordan, A. N. Korotkov, and M. Büttiker, Phys. Rev. Lett. 97, 026805 (2006).
- N. S. Williams and A. N. Jordan, Phys. Rev. Lett. 100, 026804 (2008).
- J. F. Clauser, M. Horne, A. Shimony, and R. A. Holt,
Phys. Rev. Lett. 23, 880 (1969) . - Based on intuition, we build a hierarchical scale for LGIs based on the difference between the quantum expectation value and the classical bound. In different contexts, alternative definitions might provide a better insight: see A. Cabello, Phys. Rev. Lett. 97, 140406 (2006)
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