Pseudo-digital quantum bits

Abstract

Quantum computers are analog devices; thus they are highly susceptible to accumulative errors arising from classical control electronics. Fast operation--as necessitated by decoherence--makes gating errors very likely. In most current designs for scalable quantum computers it is not possible to satisfy both the requirements of low decoherence errors and low gating errors. Here we introduce a hardware-based technique for pseudo-digital gate operation. We perform self-consistent simulations of semiconductor quantum dots, finding that pseudo-digital techniques reduce operational error rates by more than two orders of magnitude, thus facilitating fast operation.

4 pages, 3 figures

References in corpus (1)

• Experimental realization of Shor's quantum factoring algorithm using nuclear magnetic resonance

Cited by in corpus (11)

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• Spin Readout and Initialization in a Semiconductor Quantum Dot
• Implications of Simultaneous Requirements for Low Noise Exchange Gates in Double Quantum Dots
• Quantum dots in Si/SiGe 2DEGs with Schottky top-gated leads
• High Fidelity Singlet-Triplet $S$-$T_{-}$ Qubits in Inhomogeneous Magnetic Fields
• Simulation of Si:P spin-based quantum computer architecture
• Silicon in the Quantum Limit: Quantum Computing and Decoherence in Silicon Architectures