Details
| Original language | English |
|---|---|
| Article number | 220407 |
| Journal | Physical Review Letters |
| Volume | 97 |
| Issue number | 22 |
| Publication status | Published - 1 Dec 2006 |
| Externally published | Yes |
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.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Physical Review Letters, Vol. 97, No. 22, 220407, 01.12.2006.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Process tomography of ion trap quantum gates
AU - Riebe, M.
AU - Kim, K.
AU - Schindler, P.
AU - Monz, T.
AU - Schmidt, Piet Oliver
AU - Körber, T. K.
AU - Hänsel, W.
AU - Häffner, H.
AU - Roos, C. F.
AU - Blatt, R.
PY - 2006/12/1
Y1 - 2006/12/1
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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=33845209325&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.97.220407
DO - 10.1103/PhysRevLett.97.220407
M3 - Article
AN - SCOPUS:33845209325
VL - 97
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 22
M1 - 220407
ER -