Please use this identifier to cite or link to this item:
Scheme for unconventional geometric quantum computation in cavity QED
Issue Date: 
Feng, X. L., Wang, Z., Wu, C., Kwek, L. C., Lai, C. H., & Oh, C. H. (2007). Scheme for unconventional geometric quantum computation in cavity QED. Physical Review A, 75(5), 052312.
In this paper, we present a scheme for implementing the unconventional geometric two-qubit phase gate with
nonzero dynamical phase based on two-channel Raman interaction of two atoms in a cavity. We show that the
dynamical phase and the total phase for a cyclic evolution are proportional to the geometric phase in the same
cyclic evolution; hence they possess the same geometric features as does the geometric phase. In our scheme,
the atomic excited state is adiabatically eliminated, and the operation of the proposed logic gate involves only
the metastable states of the atoms; thus the effect of the atomic spontaneous emission can be neglected. The
influence of the cavity decay on our scheme is examined. It is found that the relations regarding the dynamical
phase, the total phase, and the geometric phase in the ideal situation are still valid in the case of weak cavity
decay. Feasibility and the effect of the phase fluctuations of the driving laser fields are also discussed.
1050-2947 (print)
1094-1622 (online)
Other Identifiers: 
Appears in Collections:Journal Articles

Files in This Item:
File Description SizeFormat 
PRA-75-5-052312.pdf138.85 kBAdobe PDFView/Open
Show full item record

Page view(s)

checked on Feb 16, 2019

Download(s) 50

checked on Feb 16, 2019