Experimental and theoretical progress in interaction-free measurements

Physica Scripta T

Volumn 76, Issue , 1998, Pages 115-121

  Kwiat, P G ^a  

^a LOS ALAMOS NATIONAL LABORATORY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0002993227     PISSN: 02811847     EISSN: None     Source Type: Conference Proceeding    
DOI: None     Document Type: Article

References (22)

1. Renninger, M., Z. Phys. 158, 417 (1960).
2. Dicke, R. H., Am. J. Phys. 49, 925 (1981).
3. Elitzur, A. and Vaidman, L, Found. Phys. 23, 987 (1993);
4. Vaidman, L, Quant. Opt. 6, 119 (1994).
5. Kwiat, P. G, Weinfurter, H, Herzog, T., Zeilinger, A. and Kasevich, M. A., Phys. Rev. Lett. 74, 4763 (1995).
6. Note it is possible to have complete destructive interference to port 2 for any value of R, since the two interfering paths each have one reflection and one transmission.
7. Karlsson, A, Björk, G. and Forsberg, E, Phys. Rev. Lett. 80, 1198 (1998).
8. In the simple discussion above we have omitted the finite detector efficiencies. These will, in practice, reduce P(ifm) and hence rç. For this pedagogical article, however, we will implicitly assume unit detection efficiencies; moreover, our measurements were made in such a way that detector efficiency canceled out.
9. du Marchie van Voorthuysen, E. H., Am. J. Phys. 64, 1504 (1996).
10. Misra, B. and Sudarshan, E. C. G., J. Math. Phys. 18, 756 (1977).
11. Peres, A., Am. J. Phys. 48, 931 (1980).
12. Kwiat, P. G., Weinfurter, H., Herzog, T., Zeilinger, A. and Kasevich, M. A., "Fundamental Problems in Quantum Theory: A Conference Held in Honor of Prof. John A. Wheeler", Ann. New York Acad. Sciences 755, 383 (1995).
13. Nairz, O., Herzog, T., Weinfurter, H., Zeilinger, A. and Kwiat, P. G., in preparation.
14. Kwiat, P. et al, in preparation.
15. An improved system, in which the photons are actively switched out (using a fast Pockel cell in each arm of the interferometer), is currently under investigation. Initial results showed good performance for N up to 6, with indications that N ∼ 30 may be achievable.
16. White, A. G., Mitchell, J. R., Nairz, O. and Kwiat, P. G, to appear in Phys. Rev. A.
17. In principle it would be possible to attain a smaller spot size by increasing the diameter of the input beam before the focusing lens. However, in practice we found that the angle sensitivity of the polarizing beam splitters prevented this; namely, untolerably high levels of crosstalk made it impractical to use a larger numerical aperature.
18. Kwiat, P. G., Weinfurter, H. and Zeilinger, A., "Coherence and Quantum Optics W (Edited by J. Eberly, L. Mandel and E. Wolf) (Plenum Publishing Corp. 1996), p. 673.
19. In performing the calculation the "absorber" was simulated using a beam splitter of variable reflectivity R ≡ ε. Also, the resulting phase shift acquired in passing through the object has been set to 0. The results of a more general calculation, with arbitrary phase shifts, will be presented elsewhere.
20. Miller, A, "Fundamental Optical Properties of Solids", "Handbook of Optics", (Edited by M. Bass) (McGraw-Hill, Inc. 1995), Vol. 1, p. 9.7.
21. Paul, H. and Pavicic, M., Int J. Theor. Phys. 35, 2085 (1996);
22. Tsegaye, T., et al. Phys. Rev A 57, 3987 (1998).