Giant optical Faraday rotation induced by a single electron spin in a quantum dot: Applications to entangling remote spins via a single photon
arXiv:0708.2019 · doi:10.1103/PhysRevB.78.085307
Abstract
We propose a quantum non-demolition method - giant Faraday rotation - to detect a single electron spin in a quantum dot inside a microcavity where negatively-charged exciton strongly couples to the cavity mode. Left- and right-circularly polarized light reflected from the cavity feels different phase shifts due to cavity quantum electrodynamics and the optical spin selection rule. This yields giant and tunable Faraday rotation which can be easily detected experimentally. Based on this spin-detection technique, a scalable scheme to create an arbitrary amount of entanglement between two or more remote spins via a single photon is proposed.
5 pages, 3 figures
References in corpus (5)
- Single-shot read-out of an individual electron spin in a quantum dot
- Size-dependent fine-structure splitting in self-organized InAs/GaAs quantum dots
- Hybrid quantum repeater based on dispersive CQED interactions between matter qubits and bright coherent light
- Quantum computers based on electron spins controlled by ultra-fast, off-resonant, single optical pulses
- Fast initialization of the spin state of an electron in a quantum dot in the Voigt configuration