RT Journal Article T1 Dynamics of a two-level atom observed via an interaction-free measurement A1 Luis Aina, Alfredo A1 Sánchez Soto, Luis Lorenzo AB We examine the evolution of a two-level atom when its population is monitored. The detection proposed is an interaction-fret measurement, so that the observation occurs without photon exchange between the atom and the apparatus. It is shown that the observed dynamics exhibits features that an isolated two-level atom cannot accommodate. Such phenomena are explained in terms of an atom-apparatus effective interaction. PB American Physical Society SN 1050-2947 YR 1999 FD 1999-07 LK https://hdl.handle.net/20.500.14352/59686 UL https://hdl.handle.net/20.500.14352/59686 LA eng NO [1] W. M. Itano, D. J. Heinzen, J. J. Bollinger, and D. Wineland, Phys. Rev. A 41, 2295 (1990); S. M. Chumakov, K.-E. Hellwig, and A. L. Rivera, Phys. Lett. A 197, 73 (1995); R. Onofrio and L. Viola, Phys. Rev. A 56, 39 (1997).[2] D. Home and M. A. B. Whitaker, Ann. Phys. (N.Y.) 258, 237 (1997).[3] W. Nagourney, J. Sandberg, and H. Dehmelt, Phys. Rev. Lett. 56, 2797 (1986); T. Sauter, W. Neuhauser, R. Blatt, and P. E. Toschek, ibid. 57, 1696 (1986); J. C. Bergquist, R. G. Hulet, W. M. Itano, and D. J. Wineland, ibid. 57, 1699 (1986); V. Frerichs and A. Schenzle, Phys. Rev. A 44, 1962 (1991); E. Block and P. R. Berman, ibid. 44, 1466 (1991).[4] H. J. Kimble, R. J. Cook, and A. L. Wells, Phys. Rev. A 34, 3190 (1986); M. J. Gagen and G. J. Milburn, ibid. 47, 1467 (1993).[5] Y. Aharonov and M. Vardi, Phys. Rev. D 21, 2235 (1980); T. P. Altenmüller and A. Schenzle, Phys. Rev. A 48, 70 (1993).[6] A. Luis and L. L. Sánchez-Soto, Phys. Lett. A 244, 211 (1998).[7] A. C. Elitzur and L. Vaidman, Found. Phys. 23, 987 (1993); L. Vaidman, Quantum Opt. 6, 119 (1994); R. H. Dicke, Am. J. Phys. 49, 925 (1981).[8] P. Kwiat, H. Weinfurter, T. Herzog, and A. Zeilinger, Phys. Rev. Lett. 74, 4763 (1995); P. Kwiat, H. Weinfurter, T. Herzog, A. Zeilinger, and M. Kasevich, Ann. (N.Y.) Acad. Sci. 755, 383 (1995).[9] M. Pavičić, Phys. Lett. A 223, 241 (1996).[10] A. Luis and L. L. Sánchez-Soto, Phys. Rev. A 58, 836 (1998).[11] A. Luis and L. L. Sánchez-Soto, Phys. Lett. A 252, 130 (1999).[12] H. I. Yoo and J. H. Eberly, Phys. Rep. 118, 329 (1985); C. Cohen-Tannoudji, B. Diu, and F. Lalöe, Quantum Mechanics (John Wiley and Sons, New York, 1977), complement FIV .[13] B. W. Shore and P. L. Knight, J. Mod. Opt. 40, 1195 (1993); G. Rempe, H. Walther, and N. Klein, Phys. Rev. Lett. 58, 353 (1987); G. Rempe, F. Schmidt-Kaler, and H. Walther, ibid. 64, 2783 (1990); M. Brune, P. Nussenzveig, F. Schmidt-Kaler, F. Bernardot, A. Maali, J. M. Raimond, and S. Haroche, ibid. 72, 3339 (1994); L. Davidovich, M. Brune, J. M. Raimond, and S. Haroche, Phys. Rev. A 53, 1295 (1996).[14] J. M. Raimond, M. Brune, and S. Haroche, Phys. Rev. Lett. 79, 1964 (1997).[15] S. H. Autler and C. H. Townes, Phys. Rev. 100, 703 (1955); D. E. Nitz, A. V. Smith, M. D. Levenson, and S. J. Smith, Phys. Rev. A 24, 288 (1981).[16] J. P. Marangos, J. Mod. Opt. 45, 471 (1998), and references therein. NO ©1999 The American Physical Society DS Docta Complutense RD 6 oct 2024