Authors: M.J. Gilbert, R. Akis, D.K. Ferry
Affilation: Arizona State University, United States
Pages: 198 - 201
Keywords: quantum computing, qubits, stability, narrow band-gap semiconductors
The output of a quantum computing system depends on the quality of the preparation of the initial state of the qubit or qubits to be used in the subsequent computations. Here, we have defined a qubit structure using a coupled waveguide system. To prepare the initial state of the qubit we set the coupling distance between the two waveguides to a point which corresponds to the desired electron density transfer between the input portion of the qubit and the output portion of the qubit . To this end, it is advantageous to use narrow band-gap semiconductor materials for quantum computing applications due to their relatively long phase coherent times and high mobilites. However, while favorable parameters are attainable in narrow band-gap semiconductors, it is a valid to question the stability of the initial state under varying experimentally verified phase coherent times, inelastic scattering, and imprecise definition of the coupling region in InAs, GaAs, and InSb.