2024-03-29T08:01:02Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/978352016-02-17T22:36:21Zcom_10261_115com_10261_3col_10261_368
Räsänen, E.
Castro, Alberto
Werschnik, J.
Rubio, Angel
Gross, E. K. U.
2014-06-05T12:01:03Z
2014-06-05T12:01:03Z
2007-04
Physical Review Letters 98: 157404 (2007)
0031-9007
http://hdl.handle.net/10261/97835
10.1103/PhysRevLett.98.157404
1079-7114
Complete control of single-electron states in a two-dimensional semiconductor quantum-ring model is established, opening a path into coherent laser-driven single-gate qubits. The control scheme is developed in the framework of optimal-control theory for laser pulses of two-component polarization. In terms of pulse lengths and target-state occupations, the scheme is shown to be superior to conventional control methods that exploit Rabi oscillations generated by uniform circularly polarized pulses. Current-carrying states in a quantum ring can be used to manipulate a two-level subsystem at the ring center. Combining our results, we propose a realistic approach to construct a laser-driven single-gate qubit that has switching times in the terahertz regime.
eng
openAccess
Optimal control of quantum rings by terahertz laser pulses
artículo