Aharonov-Bohm phase operations on a double-barrier nanoring charge qubit

Yuquan Wang, Ning Yang, Jia-Lin Zhu
2006 Physical Review B  
We present a scheme for charge qubit implementation in a double-barrier nanoring. The logical states of the qubit are encoded in the spatial wavefunctions of the two lowest energy states of the system. The Aharonov-Bohm phase introduced by magnetic flux, instead of tunable tunnelings, along with electric fields can be used for implementing the quantum gate operations. During the operations, the external fields should be switched smoothly enough to avoid the errors caused by the transition to
more » ... her-lying states. The structure and field effects on the validity of the qubit are also studied.
doi:10.1103/physrevb.74.035432 fatcat:vpzu3lhpozd5xj6nt4azxjllju