Spin Readout and Initialization in a Semiconductor Quantum Dot
(Submitted on 17 Apr 2003 (v1), last revised 29 Mar 2004 (this version, v2))
Electron spin qubits in semiconductors are attractive from the viewpoint of long coherence times. However, single spin measurement is challenging. Several promising schemes incorporate ancillary tunnel couplings that may provide unwanted channels for decoherence. Here, we propose a novel spin-charge transduction scheme, converting spin information to orbital information within a single quantum dot by microwave excitation. The same quantum dot can be used for rapid initialization, gating, and readout. We present detailed modeling of such a device in silicon to confirm its feasibility.
| Comments: | Published version |
| Subjects: | Materials Science (cond-mat.mtrl-sci); Quantum Physics (quant-ph) |
| Journal reference: | Phys. Rev. Lett. v92, p037901 (2004) |
| DOI: | 10.1103/PhysRevLett.92.037901 |
| Cite as: | arXiv:cond-mat/0304422v2 [cond-mat.mtrl-sci] |