Abstract
It is common belief among physicists that entangled states of quantum systems lose their coherence rather quickly. The reason is that any interaction with the environment which distinguishes between the entangled sub-systems collapses the quantum state. Here we investigate entangled states of two trapped Ca+ ions and observe robust entanglement lasting for more than 20 s.
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References
T. Yu, J.H. Eberly, Phys. Rev. B 66, 193 306 (2002)
W.H. Zurek, Phys. Today 44, 36 (1991)
M.A. Nielsen, I.L. Chuang, Quantum Computation and Quantum Information (Cambridge University Press, Cambridge, 2000)
S. Haroche, J.M. Raimond, Phys. Today 49, 51 (1996)
F. Schmidt-Kaler, H. Häffner, S. Gulde, M. Riebe, G.P.T. Lancaster, T. Deuschle, C. Becher, W. Hänsel, J. Eschner, C.F. Roos, R. Blatt, Appl. Phys. B 77, 789 (2003)
C.F. Roos, G.P.T. Lancaster, M. Riebe, H. Häffner, W. Hänsel, S. Gulde, C. Becher, J. Eschner, F. Schmidt-Kaler, R. Blatt, Phys. Rev. Lett. 92, 220 402 (2004)
D. Kielpinski, V. Meyer, M.A. Rowe, C.A. Sackett, W.M. Itano, C. Monroe, D.J. Wineland, Science 291, 1013 (2001)
C. Langer, R. Ozeri, J.D. Jost, J. Chiaverini, B. DeMarco, A. Ben-Kish, R.B. Blakestad, J. Britton, D.B. Hume, W.M. Itano, D. Leibfried, R. Reichle, T. Rosenband, T. Schaetz, P.O. Schmidt, D.J. Wineland, arXiv:quant-ph/0504076 (2005)
C.A. Sackett, D. Kielpinski, B.E. King, C. Langer, V. Meyer, C.J. Myatt, M. Rowe, Q.A. Turchette, W.M. Itano, D.J. Wineland, C. Monroe, Nature 404, 256 (2000)
D.J. Wineland, C.R. Monroe, W.M. Itano, D. Leibfried, B.E. King, D.M. Meekhof, J. Res. Natl. Inst. Stand. Technol. 103, 259 (1998)
J.J. Bollinger, D.J. Heinzen, W.M. Itano, S.L. Gilbert, D.J. Wineland, IEEE Trans. Instrum. Meas. 40, 126 (1991)
F. Schmidt-Kaler, S. Gulde, M. Riebe, T. Deuschle, A. Kreuter, G. Lancaster, C. Becher, J. Eschner, H. Häffner, R. Blatt, J. Phys. B: At. Mol. Opt. Phys. 36, 623 (2003)