2004/11/30 by L. Tian, R. Blatt, P. Zoller · 1 citation
Computer Science · Physics and Astronomy · #Charge (physics) #Charge qubit #Coupling (piping) #Noise (video) #Phase qubit #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum computer #Quantum decoherence #Qubit #Scalability #Trapped ion quantum computer #quant-ph
paper · pdf · doi:10.1140/epjd/e2004-00172-5
published as Eur. J. Phys. D 32, 201 (2005)
openalex publication_date 2004/11/30 · arxiv created 2004/12/23 · arxiv updated 2011/07/26 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A hybrid quantum computing scheme is studied where the hybrid qubit is made of an ion trap qubit serving as the information storage and a solid-state charge qubit serving as the quantum processor, connected by a superconducting cavity. In this paper, we extend our previous work [1] and study the decoherence, coupling and scalability of the hybrid system. We present our calculations of the decoherence of the coupled ion - charge system due to the charge fluctuations in the solid-state system and the dissipation of the superconducting cavity under laser radiation. A gate scheme that exploits rapid state flips of the charge qubit to reduce decoherence by the charge noise is designed. We also study a superconducting switch that is inserted between the cavity and the charge qubit and provides tunable coupling between the qubits. The scalability of the hybrid scheme is discussed together with several potential experimental obstacles in realizing this scheme.