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Updated: Jun 21, 2026

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
Published on: November 1, 2013
Realization of the CNOT quantum gate operation in six-dimensional ammonia using the OCT-MCTDH approach
1Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada. markus.schroeder@pci.uni-heidelberg.de
Abstract:
Comparative studies of implementations of the controlled NOT quantum gate operation using vibrational states of ammonia as the qubit states are presented. The quantum gate operations are realized using tailored laser pulses, which are calculated using a combined approach of optimal control theory and the multiconfiguration time-dependent Hartree method. We compare results obtained with a reduced model of ammonia with three degrees of freedom (all N-H bond distances fixed) to those obtained with a full six-dimensional model. In our study, the optimal laser pulses of both models induce similar underlying physical mechanisms while the gate quality within the reduced model (>98%) is much higher than within the six-dimensional model (approximately 80%).
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