Fast nonadiabatic two-qubit gates for the Kane quantum computer
Journal
Physical Review A - Atomic, Molecular, and Optical Physics
Journal Volume
68
Journal Issue
1
Date Issued
2003
Author(s)
Hill, C.D.
Abstract
In this paper, we apply the canonical decomposition of two-qubit unitaries to find pulse schemes to control the proposed Kane quantum computer. We explicitly find pulse sequences for the controlled-NOT, swap, square root of swap, and controlled Z rotations. We analyze the speed and fidelity of these gates, both of which compare favorably to existing schemes. The pulse sequences presented in this paper are theoretically faster, with higher fidelity, and simpler. Any two-qubit gate may be easily found and implemented using similar pulse sequences. Numerical simulation is used to verify the accuracy of each pulse scheme.
Type
journal article