2004/03/31 by Andrew D. Greentree, A. R. Hamilton, Lloyd C. L. Hollenberg +2 · 3 citations
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #cond-mat.other #quant-ph
paper · pdf · doi:10.1103/physrevb.71.113310
published as Phys. Rev. B 71, 113310 (2005) · Replaced with (approximately) published version
openalex publication_date 2005/03/23 · arxiv created 2005/10/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We identify a mechanism to read out a single solid-state electron spin using an all-electrical spin-to-charge conversion in a closed system. Our scheme uses three donors and two electron spins, one spin is the qubit, the other is a reference. The population in the third, originally ionized, donor is monitored with an electrometer. Energy-dependent tunneling of the reference spin to the ionized donor is used to determine the state of the qubit. In contrast to previous methods [e.g., B. E. Kane, Nature (London) 393, 133 (1998)] we avoid double electron occupancy of any site within the system, thereby eliminating the possibility of unwanted electron loss from the system. The single spin readout scheme described here is applicable to both electron and nuclear spin based quantum computer architectures.