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- Title
Multipartite entanglement purification with quantum nondemolition detectors.
- Authors
Sheng, Y. B.; Deng, F. G.; Zhao, B. K.; Wang, T. J.; Zhou, H. Y.
- Abstract
We present a scheme for multipartite entanglement purification of quantum systems in a Greenberger-Horne-Zeilinger state with quantum nondemolition detectors (QNDs). This scheme does not require the controlled-not gates which cannot be implemented perfectly with linear optical elements at present, but QNDs based on cross-Kerr nonlinearities. It works with two steps, i.e., the bit-flipping error correction and the phase-flipping error correction. These two steps can be iterated perfectly with parity checks and simple single-photon measurements. This scheme does not require the parties to possess sophisticated single photon detectors. These features maybe make this scheme more efficient and feasible than others in practical applications.
- Subjects
QUANTUM theory; DETECTORS; PHOTON detectors; NONLINEAR statistical models; ENGINEERING instruments
- Publication
European Physical Journal D (EPJ D), 2010, Vol 55, Issue 1, p235
- ISSN
1434-6060
- Publication type
Article
- DOI
10.1140/epjd/e2009-00237-y