A. Gilchrist, N. K. Langford, and M. A. Nielsen, "Distance measures to compare real and ideal quantum processes," Phys. Rev. A 71, 062310 (2005).

[CrossRef]

H. F. Hofmann, "Complementary classical fidelities as an efficient criterion for the evaluation of experimentally realized quantum operations," Phys. Rev. Lett. 94, 160504 (2005).

[CrossRef]
[PubMed]

A. M. Lance, T. Symul, W. P. Bowen, B. C. Sanders, and P. K. Lam, "Tripartite quantum state sharing," Phys. Rev. Lett. 92, 177903 (2004).

[CrossRef]
[PubMed]

C. M. Caves and K. Wódkiewicz, "Fidelity of Gaussian channels," Open Syst. Inf. Dyn. 11, 309-323 (2004).

[CrossRef]

J. Lee, M. S. Kim, and C. Brukner, "Operationally invariant measure of the distance between quantum states by complementary measurements," Phys. Rev. Lett. 91, 087902 (2003).

[CrossRef]
[PubMed]

W. P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, H. A. Bachor, T. Symul, and P. K. Lam, "Experimental investigation of continuous-variable quantum teleportation," Phys. Rev. A 67, 032302 (2003).

[CrossRef]

W.P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, T. Symul, and P. K. Lam, "Unity gain and nonunity gain quantum teleportation," IEEE J. Sel. Top. Quantum Electron. 9, 1519-1532 (2003).

[CrossRef]

T. C. Zhang, K. W. Goh, C. W. Chou, P. Lodahl, and H. J. Kimble, "Quantum teleportation of light beams," Phys. Rev. A 67, 033802 (2003).

[CrossRef]

J. L. Dodd and M. A. Nielsen, "Simple operational interpretation of the fidelity of mixed states," Phys. Rev. A 66, 044301 (2002).

[CrossRef]

J. Fiurásek, "Improving fidelity of continuous-variable teleportation via local operations," Phys. Rev. A 66, 012304 (2002).

[CrossRef]

P. Marian, T. A. Marian, and H. Scutaru, "Quantifying nonclassicality of one-mode Gaussian states of the radiation field," Phys. Rev. Lett. 88, 153601 (2002).

[CrossRef]
[PubMed]

F. Grosshans and P. Grangier, "Quantum cloning and teleportation criteria for continuous quantum variables," Phys. Rev. A 64, 010301 (2001).

[CrossRef]

S. L. Braunstein, C. A. Fuchs, H. J. Kimble, and P. van Loock, "Quantum versus classical domains for teleportation with continuous variables," Phys. Rev. A 64, 022321 (2001).

[CrossRef]

J. Lee, M. S. Kim, and H. Jeong, "Transfer of nonclassical features in quantum teleportation via a mixed quantum channel," Phys. Rev. A 62, 032305 (2000).

[CrossRef]

S. L. Braunstein, C. A. Fuchs, and H. J. Kimble, "Criteria for continuous-variable quantum teleportation," J. Mod. Opt. 47, 267-278 (2000).

[CrossRef]

A. Furusawa, J. L. Sørensen, S. L. Braunstein, C. A. Fuchs, H. J. Kimble, and E. S. Polzik, "Unconditional quantum teleportation," Science 282, 706-709 (1998).

[CrossRef]
[PubMed]

T. C. Ralph and P. K. Lam, "Teleportation with bright squeezed light," Phys. Rev. Lett. 81, 5668-5671 (1998).

[CrossRef]

X.-B. Wang, C. H. Oh, and L. C. Kwek, "Bures fidelity of displaced squeezed thermal states," Phys. Rev. A 58, 4186-4190 (1998).

[CrossRef]

Gh.-S. Paraoanu and H. Scutaru, "Bures distance between two displaced thermal states," Phys. Rev. A 58, 869-871 (1998).

[CrossRef]

J. Twamley, "Bures and statistical distance for squeezed thermal states," J. Phys. A 29, 3723-3731 (1996).

[CrossRef]

R. Jozsa, "Fidelity for mixed quantum states," J. Mod. Opt. 41, 2315-2323 (1994).

[CrossRef]

A. Uhlmann, "The 'transition probability' in the state space of a*-algebra," Rep. Math. Phys. 9, 273-279 (1976).

[CrossRef]

W. P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, H. A. Bachor, T. Symul, and P. K. Lam, "Experimental investigation of continuous-variable quantum teleportation," Phys. Rev. A 67, 032302 (2003).

[CrossRef]

A. M. Lance, T. Symul, W. P. Bowen, B. C. Sanders, and P. K. Lam, "Tripartite quantum state sharing," Phys. Rev. Lett. 92, 177903 (2004).

[CrossRef]
[PubMed]

W.P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, T. Symul, and P. K. Lam, "Unity gain and nonunity gain quantum teleportation," IEEE J. Sel. Top. Quantum Electron. 9, 1519-1532 (2003).

[CrossRef]

W. P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, H. A. Bachor, T. Symul, and P. K. Lam, "Experimental investigation of continuous-variable quantum teleportation," Phys. Rev. A 67, 032302 (2003).

[CrossRef]

S. L. Braunstein, C. A. Fuchs, H. J. Kimble, and P. van Loock, "Quantum versus classical domains for teleportation with continuous variables," Phys. Rev. A 64, 022321 (2001).

[CrossRef]

S. L. Braunstein, C. A. Fuchs, and H. J. Kimble, "Criteria for continuous-variable quantum teleportation," J. Mod. Opt. 47, 267-278 (2000).

[CrossRef]

A. Furusawa, J. L. Sørensen, S. L. Braunstein, C. A. Fuchs, H. J. Kimble, and E. S. Polzik, "Unconditional quantum teleportation," Science 282, 706-709 (1998).

[CrossRef]
[PubMed]

J. Lee, M. S. Kim, and C. Brukner, "Operationally invariant measure of the distance between quantum states by complementary measurements," Phys. Rev. Lett. 91, 087902 (2003).

[CrossRef]
[PubMed]

W. P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, H. A. Bachor, T. Symul, and P. K. Lam, "Experimental investigation of continuous-variable quantum teleportation," Phys. Rev. A 67, 032302 (2003).

[CrossRef]

W.P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, T. Symul, and P. K. Lam, "Unity gain and nonunity gain quantum teleportation," IEEE J. Sel. Top. Quantum Electron. 9, 1519-1532 (2003).

[CrossRef]

C. M. Caves and K. Wódkiewicz, "Fidelity of Gaussian channels," Open Syst. Inf. Dyn. 11, 309-323 (2004).

[CrossRef]

C. M. Caves and K. Wodkiewicz, "Classical phase-space descriptions of continuous-variable teleportation," http://arxiv.org/abs/quant-ph/0401149 (2004).

T. C. Zhang, K. W. Goh, C. W. Chou, P. Lodahl, and H. J. Kimble, "Quantum teleportation of light beams," Phys. Rev. A 67, 033802 (2003).

[CrossRef]

M. A. Nielsen and I. L. Chuang, Quantum Computation and Quantum Information (Cambridge U. Press, 2000).

J. L. Dodd and M. A. Nielsen, "Simple operational interpretation of the fidelity of mixed states," Phys. Rev. A 66, 044301 (2002).

[CrossRef]

J. Fiurásek, "Improving fidelity of continuous-variable teleportation via local operations," Phys. Rev. A 66, 012304 (2002).

[CrossRef]

S. L. Braunstein, C. A. Fuchs, H. J. Kimble, and P. van Loock, "Quantum versus classical domains for teleportation with continuous variables," Phys. Rev. A 64, 022321 (2001).

[CrossRef]

S. L. Braunstein, C. A. Fuchs, and H. J. Kimble, "Criteria for continuous-variable quantum teleportation," J. Mod. Opt. 47, 267-278 (2000).

[CrossRef]

A. Furusawa, J. L. Sørensen, S. L. Braunstein, C. A. Fuchs, H. J. Kimble, and E. S. Polzik, "Unconditional quantum teleportation," Science 282, 706-709 (1998).

[CrossRef]
[PubMed]

A. Furusawa, J. L. Sørensen, S. L. Braunstein, C. A. Fuchs, H. J. Kimble, and E. S. Polzik, "Unconditional quantum teleportation," Science 282, 706-709 (1998).

[CrossRef]
[PubMed]

A. Gilchrist, N. K. Langford, and M. A. Nielsen, "Distance measures to compare real and ideal quantum processes," Phys. Rev. A 71, 062310 (2005).

[CrossRef]

T. C. Zhang, K. W. Goh, C. W. Chou, P. Lodahl, and H. J. Kimble, "Quantum teleportation of light beams," Phys. Rev. A 67, 033802 (2003).

[CrossRef]

F. Grosshans and P. Grangier, "Quantum cloning and teleportation criteria for continuous quantum variables," Phys. Rev. A 64, 010301 (2001).

[CrossRef]

F. Grosshans and P. Grangier, "Quantum cloning and teleportation criteria for continuous quantum variables," Phys. Rev. A 64, 010301 (2001).

[CrossRef]

H. F. Hofmann, "Complementary classical fidelities as an efficient criterion for the evaluation of experimentally realized quantum operations," Phys. Rev. Lett. 94, 160504 (2005).

[CrossRef]
[PubMed]

J. Lee, M. S. Kim, and H. Jeong, "Transfer of nonclassical features in quantum teleportation via a mixed quantum channel," Phys. Rev. A 62, 032305 (2000).

[CrossRef]

R. Jozsa, "Fidelity for mixed quantum states," J. Mod. Opt. 41, 2315-2323 (1994).

[CrossRef]

J. Lee, M. S. Kim, and C. Brukner, "Operationally invariant measure of the distance between quantum states by complementary measurements," Phys. Rev. Lett. 91, 087902 (2003).

[CrossRef]
[PubMed]

J. Lee, M. S. Kim, and H. Jeong, "Transfer of nonclassical features in quantum teleportation via a mixed quantum channel," Phys. Rev. A 62, 032305 (2000).

[CrossRef]

T. C. Zhang, K. W. Goh, C. W. Chou, P. Lodahl, and H. J. Kimble, "Quantum teleportation of light beams," Phys. Rev. A 67, 033802 (2003).

[CrossRef]

S. L. Braunstein, C. A. Fuchs, H. J. Kimble, and P. van Loock, "Quantum versus classical domains for teleportation with continuous variables," Phys. Rev. A 64, 022321 (2001).

[CrossRef]

S. L. Braunstein, C. A. Fuchs, and H. J. Kimble, "Criteria for continuous-variable quantum teleportation," J. Mod. Opt. 47, 267-278 (2000).

[CrossRef]

A. Furusawa, J. L. Sørensen, S. L. Braunstein, C. A. Fuchs, H. J. Kimble, and E. S. Polzik, "Unconditional quantum teleportation," Science 282, 706-709 (1998).

[CrossRef]
[PubMed]

X.-B. Wang, C. H. Oh, and L. C. Kwek, "Bures fidelity of displaced squeezed thermal states," Phys. Rev. A 58, 4186-4190 (1998).

[CrossRef]

A. M. Lance, T. Symul, W. P. Bowen, B. C. Sanders, and P. K. Lam, "Tripartite quantum state sharing," Phys. Rev. Lett. 92, 177903 (2004).

[CrossRef]
[PubMed]

W.P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, T. Symul, and P. K. Lam, "Unity gain and nonunity gain quantum teleportation," IEEE J. Sel. Top. Quantum Electron. 9, 1519-1532 (2003).

[CrossRef]

W. P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, H. A. Bachor, T. Symul, and P. K. Lam, "Experimental investigation of continuous-variable quantum teleportation," Phys. Rev. A 67, 032302 (2003).

[CrossRef]

T. C. Ralph and P. K. Lam, "Teleportation with bright squeezed light," Phys. Rev. Lett. 81, 5668-5671 (1998).

[CrossRef]

A. M. Lance, T. Symul, W. P. Bowen, B. C. Sanders, and P. K. Lam, "Tripartite quantum state sharing," Phys. Rev. Lett. 92, 177903 (2004).

[CrossRef]
[PubMed]

A. Gilchrist, N. K. Langford, and M. A. Nielsen, "Distance measures to compare real and ideal quantum processes," Phys. Rev. A 71, 062310 (2005).

[CrossRef]

J. Lee, M. S. Kim, and C. Brukner, "Operationally invariant measure of the distance between quantum states by complementary measurements," Phys. Rev. Lett. 91, 087902 (2003).

[CrossRef]
[PubMed]

J. Lee, M. S. Kim, and H. Jeong, "Transfer of nonclassical features in quantum teleportation via a mixed quantum channel," Phys. Rev. A 62, 032305 (2000).

[CrossRef]

T. C. Zhang, K. W. Goh, C. W. Chou, P. Lodahl, and H. J. Kimble, "Quantum teleportation of light beams," Phys. Rev. A 67, 033802 (2003).

[CrossRef]

P. Marian, T. A. Marian, and H. Scutaru, "Quantifying nonclassicality of one-mode Gaussian states of the radiation field," Phys. Rev. Lett. 88, 153601 (2002).

[CrossRef]
[PubMed]

P. Marian, T. A. Marian, and H. Scutaru, "Quantifying nonclassicality of one-mode Gaussian states of the radiation field," Phys. Rev. Lett. 88, 153601 (2002).

[CrossRef]
[PubMed]

D. F. Walls and G. J. Milburn, Quantum Optics (Springer-Verlag, 1994).

A. Gilchrist, N. K. Langford, and M. A. Nielsen, "Distance measures to compare real and ideal quantum processes," Phys. Rev. A 71, 062310 (2005).

[CrossRef]

J. L. Dodd and M. A. Nielsen, "Simple operational interpretation of the fidelity of mixed states," Phys. Rev. A 66, 044301 (2002).

[CrossRef]

M. A. Nielsen and I. L. Chuang, Quantum Computation and Quantum Information (Cambridge U. Press, 2000).

X.-B. Wang, C. H. Oh, and L. C. Kwek, "Bures fidelity of displaced squeezed thermal states," Phys. Rev. A 58, 4186-4190 (1998).

[CrossRef]

Gh.-S. Paraoanu and H. Scutaru, "Bures distance between two displaced thermal states," Phys. Rev. A 58, 869-871 (1998).

[CrossRef]

A. Furusawa, J. L. Sørensen, S. L. Braunstein, C. A. Fuchs, H. J. Kimble, and E. S. Polzik, "Unconditional quantum teleportation," Science 282, 706-709 (1998).

[CrossRef]
[PubMed]

W.P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, T. Symul, and P. K. Lam, "Unity gain and nonunity gain quantum teleportation," IEEE J. Sel. Top. Quantum Electron. 9, 1519-1532 (2003).

[CrossRef]

W. P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, H. A. Bachor, T. Symul, and P. K. Lam, "Experimental investigation of continuous-variable quantum teleportation," Phys. Rev. A 67, 032302 (2003).

[CrossRef]

T. C. Ralph and P. K. Lam, "Teleportation with bright squeezed light," Phys. Rev. Lett. 81, 5668-5671 (1998).

[CrossRef]

A. M. Lance, T. Symul, W. P. Bowen, B. C. Sanders, and P. K. Lam, "Tripartite quantum state sharing," Phys. Rev. Lett. 92, 177903 (2004).

[CrossRef]
[PubMed]

W.P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, T. Symul, and P. K. Lam, "Unity gain and nonunity gain quantum teleportation," IEEE J. Sel. Top. Quantum Electron. 9, 1519-1532 (2003).

[CrossRef]

W. P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, H. A. Bachor, T. Symul, and P. K. Lam, "Experimental investigation of continuous-variable quantum teleportation," Phys. Rev. A 67, 032302 (2003).

[CrossRef]

P. Marian, T. A. Marian, and H. Scutaru, "Quantifying nonclassicality of one-mode Gaussian states of the radiation field," Phys. Rev. Lett. 88, 153601 (2002).

[CrossRef]
[PubMed]

Gh.-S. Paraoanu and H. Scutaru, "Bures distance between two displaced thermal states," Phys. Rev. A 58, 869-871 (1998).

[CrossRef]

A. Furusawa, J. L. Sørensen, S. L. Braunstein, C. A. Fuchs, H. J. Kimble, and E. S. Polzik, "Unconditional quantum teleportation," Science 282, 706-709 (1998).

[CrossRef]
[PubMed]

A. M. Lance, T. Symul, W. P. Bowen, B. C. Sanders, and P. K. Lam, "Tripartite quantum state sharing," Phys. Rev. Lett. 92, 177903 (2004).

[CrossRef]
[PubMed]

W.P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, T. Symul, and P. K. Lam, "Unity gain and nonunity gain quantum teleportation," IEEE J. Sel. Top. Quantum Electron. 9, 1519-1532 (2003).

[CrossRef]

W. P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, H. A. Bachor, T. Symul, and P. K. Lam, "Experimental investigation of continuous-variable quantum teleportation," Phys. Rev. A 67, 032302 (2003).

[CrossRef]

W. P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, H. A. Bachor, T. Symul, and P. K. Lam, "Experimental investigation of continuous-variable quantum teleportation," Phys. Rev. A 67, 032302 (2003).

[CrossRef]

W.P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, T. Symul, and P. K. Lam, "Unity gain and nonunity gain quantum teleportation," IEEE J. Sel. Top. Quantum Electron. 9, 1519-1532 (2003).

[CrossRef]

J. Twamley, "Bures and statistical distance for squeezed thermal states," J. Phys. A 29, 3723-3731 (1996).

[CrossRef]

A. Uhlmann, "The 'transition probability' in the state space of a*-algebra," Rep. Math. Phys. 9, 273-279 (1976).

[CrossRef]

S. L. Braunstein, C. A. Fuchs, H. J. Kimble, and P. van Loock, "Quantum versus classical domains for teleportation with continuous variables," Phys. Rev. A 64, 022321 (2001).

[CrossRef]

D. F. Walls and G. J. Milburn, Quantum Optics (Springer-Verlag, 1994).

X.-B. Wang, C. H. Oh, and L. C. Kwek, "Bures fidelity of displaced squeezed thermal states," Phys. Rev. A 58, 4186-4190 (1998).

[CrossRef]

C. M. Caves and K. Wodkiewicz, "Classical phase-space descriptions of continuous-variable teleportation," http://arxiv.org/abs/quant-ph/0401149 (2004).

C. M. Caves and K. Wódkiewicz, "Fidelity of Gaussian channels," Open Syst. Inf. Dyn. 11, 309-323 (2004).

[CrossRef]

T. C. Zhang, K. W. Goh, C. W. Chou, P. Lodahl, and H. J. Kimble, "Quantum teleportation of light beams," Phys. Rev. A 67, 033802 (2003).

[CrossRef]

W.P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, T. Symul, and P. K. Lam, "Unity gain and nonunity gain quantum teleportation," IEEE J. Sel. Top. Quantum Electron. 9, 1519-1532 (2003).

[CrossRef]

R. Jozsa, "Fidelity for mixed quantum states," J. Mod. Opt. 41, 2315-2323 (1994).

[CrossRef]

S. L. Braunstein, C. A. Fuchs, and H. J. Kimble, "Criteria for continuous-variable quantum teleportation," J. Mod. Opt. 47, 267-278 (2000).

[CrossRef]

J. Twamley, "Bures and statistical distance for squeezed thermal states," J. Phys. A 29, 3723-3731 (1996).

[CrossRef]

C. M. Caves and K. Wódkiewicz, "Fidelity of Gaussian channels," Open Syst. Inf. Dyn. 11, 309-323 (2004).

[CrossRef]

J. Lee, M. S. Kim, and H. Jeong, "Transfer of nonclassical features in quantum teleportation via a mixed quantum channel," Phys. Rev. A 62, 032305 (2000).

[CrossRef]

J. Fiurásek, "Improving fidelity of continuous-variable teleportation via local operations," Phys. Rev. A 66, 012304 (2002).

[CrossRef]

T. C. Zhang, K. W. Goh, C. W. Chou, P. Lodahl, and H. J. Kimble, "Quantum teleportation of light beams," Phys. Rev. A 67, 033802 (2003).

[CrossRef]

F. Grosshans and P. Grangier, "Quantum cloning and teleportation criteria for continuous quantum variables," Phys. Rev. A 64, 010301 (2001).

[CrossRef]

S. L. Braunstein, C. A. Fuchs, H. J. Kimble, and P. van Loock, "Quantum versus classical domains for teleportation with continuous variables," Phys. Rev. A 64, 022321 (2001).

[CrossRef]

J. L. Dodd and M. A. Nielsen, "Simple operational interpretation of the fidelity of mixed states," Phys. Rev. A 66, 044301 (2002).

[CrossRef]

A. Gilchrist, N. K. Langford, and M. A. Nielsen, "Distance measures to compare real and ideal quantum processes," Phys. Rev. A 71, 062310 (2005).

[CrossRef]

W. P. Bowen, N. Treps, B. C. Buchler, R. Schnabel, T. C. Ralph, H. A. Bachor, T. Symul, and P. K. Lam, "Experimental investigation of continuous-variable quantum teleportation," Phys. Rev. A 67, 032302 (2003).

[CrossRef]

X.-B. Wang, C. H. Oh, and L. C. Kwek, "Bures fidelity of displaced squeezed thermal states," Phys. Rev. A 58, 4186-4190 (1998).

[CrossRef]

Gh.-S. Paraoanu and H. Scutaru, "Bures distance between two displaced thermal states," Phys. Rev. A 58, 869-871 (1998).

[CrossRef]

P. Marian, T. A. Marian, and H. Scutaru, "Quantifying nonclassicality of one-mode Gaussian states of the radiation field," Phys. Rev. Lett. 88, 153601 (2002).

[CrossRef]
[PubMed]

T. C. Ralph and P. K. Lam, "Teleportation with bright squeezed light," Phys. Rev. Lett. 81, 5668-5671 (1998).

[CrossRef]

H. F. Hofmann, "Complementary classical fidelities as an efficient criterion for the evaluation of experimentally realized quantum operations," Phys. Rev. Lett. 94, 160504 (2005).

[CrossRef]
[PubMed]

J. Lee, M. S. Kim, and C. Brukner, "Operationally invariant measure of the distance between quantum states by complementary measurements," Phys. Rev. Lett. 91, 087902 (2003).

[CrossRef]
[PubMed]

A. M. Lance, T. Symul, W. P. Bowen, B. C. Sanders, and P. K. Lam, "Tripartite quantum state sharing," Phys. Rev. Lett. 92, 177903 (2004).

[CrossRef]
[PubMed]

A. Uhlmann, "The 'transition probability' in the state space of a*-algebra," Rep. Math. Phys. 9, 273-279 (1976).

[CrossRef]

A. Furusawa, J. L. Sørensen, S. L. Braunstein, C. A. Fuchs, H. J. Kimble, and E. S. Polzik, "Unconditional quantum teleportation," Science 282, 706-709 (1998).

[CrossRef]
[PubMed]

M. A. Nielsen and I. L. Chuang, Quantum Computation and Quantum Information (Cambridge U. Press, 2000).

C. M. Caves and K. Wodkiewicz, "Classical phase-space descriptions of continuous-variable teleportation," http://arxiv.org/abs/quant-ph/0401149 (2004).

D. F. Walls and G. J. Milburn, Quantum Optics (Springer-Verlag, 1994).

This simplifying assumption has no bearing on the conclusions of the analysis.

There are some exceptions, such as nonunity gain teleportation.