Initial State Preparation and Stability in Narrow Band-Gap Semiconductor Qubits

	Nanotech 2003 Vol. 2 Technical Proceedings of the 2003 Nanotechnology Conference and Trade Show, Volume 2 Chapter 5: Quantum Effects, Quantum Devices and Spintronics
	Initial State Preparation and Stability in Narrow Band-Gap Semiconductor Qubits
Authors:	M.J. Gilbert, R. Akis, D.K. Ferry
Affilation:	Arizona State University, US
Pages:	198 - 201
Keywords:	quantum computing, qubits, stability, narrow band-gap semiconductors
Abstract:	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 [1]. 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.
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ISBN:	0-9728422-1-7
Pages:	600
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