Quantum logic between remote quantum registers

DSpace/Manakin Repository

Quantum logic between remote quantum registers

Citable link to this page


Title: Quantum logic between remote quantum registers
Author: Yao, Norman Ying; Gong, Z.-X; Laumann, C; Bennett, Steven; Duan, L.-M.; Lukin, Mikhail D.; Jiang, L.; Gorshkov, A.V.

Note: Order does not necessarily reflect citation order of authors.

Citation: Yao, N., Z.-X. Gong, C. Laumann, S. Bennett, L.-M. Duan, M. Lukin, L. Jiang, and A. Gorshkov. 2013. “Quantum Logic Between Remote Quantum Registers.” Physical Review A 87 (2) (February).
Full Text & Related Files:
Abstract: We consider two approaches to dark-spin-mediated quantum computing in hybrid solid-state spin architectures. First, we review the notion of eigenmode-mediated unpolarized spin-chain state transfer and extend the analysis to various experimentally relevant imperfections: quenched disorder, dynamical decoherence, and uncompensated long-range coupling. In finite-length chains, the interplay between disorder-induced localization and decoherence yields a natural optimal channel fidelity, which we calculate. Long-range dipolar couplings induce a finite intrinsic lifetime for the mediating eigenmode; extensive numerical simulations of dipolar chains of lengths up to L=12 show remarkably high fidelity despite these decay processes. We further briefly consider the extension of the protocol to bosonic systems of coupled oscillators. Second, we introduce a quantum mirror based architecture for universal quantum computing that exploits all of the dark spins in the system as potential qubits. While this dramatically increases the number of qubits available, the composite operations required to manipulate dark-spin qubits significantly raise the error threshold for robust operation. Finally, we demonstrate that eigenmode-mediated state transfer can enable robust long-range logic between spatially separated nitrogen-vacancy registers in diamond; disorder-averaged numerics confirm that high-fidelity gates are achievable even in the presence of moderate disorder.
Published Version: doi:10.1103/PhysRevLett.110.067601
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:12285464
Downloads of this work:

Show full Dublin Core record

This item appears in the following Collection(s)


Search DASH

Advanced Search