Entanglement of solid-state qubits by measurement
Preprint
- 21 June 2002
Abstract
We show that two identical solid-state qubits can be made fully entangled (starting from completely mixed state) with probability 1/4 just measuring them by a detector, equally coupled to the qubits. This happens in the case of repeated strong (projective) measurements as well as in a more realistic case of weak continuous measurement. In the latter case the entangled state can be identified by a flat spectrum of the detector shot noise, while the non-entangled state (probability 3/4) leads to a spectral peak at the Rabi frequency with the maximum peak-to-pedestal ratio of 32/3.Keywords
All Related Versions
- Version 1, 2002-06-21, ArXiv
- Published version: Physical Review B, 67 (24).