Process Tomography of Ion Trap Quantum Gates

by: M Riebe, K Kim, P Schindler, T Monz, PO Schmidt, TK Körber, W Hänsel, H Häffner, CF Roos, R Blatt

Physical Review Letters, Vol. 97, No. 22. (2006)

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摘要

A crucial building block for quantum information processing with trapped ions is a controlled-NOT quantum gate. In this Letter, two different sequences of laser pulses implementing such a gate operation are analyzed using quantum process tomography. Fidelities of up to 92.6(6)% are achieved for single-gate operations and up to 83.4(8)% for two concatenated gate operations. By process tomography we assess the performance of the gates for different experimental realizations and demonstrate the advantage of amplitude-shaped laser pulses over simple square pulses. We also investigate whether the performance of concatenated gates can be inferred from the analysis of the single gates.

@article{RiebeCNOT2006, abstract = {A crucial building block for quantum information processing with trapped ions is a controlled-NOT quantum gate. In this Letter, two different sequences of laser pulses implementing such a gate operation are analyzed using quantum process tomography. Fidelities of up to 92.6(6)\% are achieved for single-gate operations and up to 83.4(8)\% for two concatenated gate operations. By process tomography we assess the performance of the gates for different experimental realizations and demonstrate the advantage of amplitude-shaped laser pulses over simple square pulses. We also investigate whether the performance of concatenated gates can be inferred from the analysis of the single gates.}, author = {Riebe, M. and Kim, K. and Schindler, P. and Monz, T. and Schmidt, P. O. and K\"{o}rber, T. K. and H\"{a}nsel, W. and H\"{a}ffner, H. and Roos, C. F. and Blatt, R. }, citeulike-article-id = {1877561}, doi = {http://dx.doi.org/10.1103/PhysRevLett.97.220407}, journal = {Physical Review Letters}, keywords = {blatt, ion, pulse-shape}, number = {22}, posted-at = {2007-11-07 12:51:22}, priority = {2}, publisher = {APS}, title = {Process Tomography of Ion Trap Quantum Gates}, url = {http://dx.doi.org/10.1103/PhysRevLett.97.220407}, volume = {97}, year = {2006} }

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TY - JOUR ID - RiebeCNOT2006 L3 - citeulike-article-id:1877561 N2 - A crucial building block for quantum information processing with trapped ions is a controlled-NOT quantum gate. In this Letter, two different sequences of laser pulses implementing such a gate operation are analyzed using quantum process tomography. Fidelities of up to 92.6(6)% are achieved for single-gate operations and up to 83.4(8)% for two concatenated gate operations. By process tomography we assess the performance of the gates for different experimental realizations and demonstrate the advantage of amplitude-shaped laser pulses over simple square pulses. We also investigate whether the performance of concatenated gates can be inferred from the analysis of the single gates. IS - 22 JF - Physical Review Letters TI - Process Tomography of Ion Trap Quantum Gates PB - APS VL - 97 KW - blatt KW - ion KW - pulse-shape AU - Riebe, M AU - Kim, K AU - Schindler, P AU - Monz, T AU - Schmidt, PO AU - Körber, TK AU - Hänsel, W AU - Häffner, H AU - Roos, CF AU - Blatt, R PY - 2006/// UR - http://dx.doi.org/10.1103/PhysRevLett.97.220407 ER -

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