Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Ahn, Charlene"'
Publikováno v:
Extending quantum error correction : new continuous measurement protocols and improved fault-tolerant overhead [electronic thesis]
Thesis (Ph. D.)--PQ# 3151334.
Includes bibliographical references.
Includes bibliographical references.
Externí odkaz:
http://resolver.caltech.edu/CaltechETD:etd-05192004-164713
Autor:
Ahn, Charlene Sonja
Quantum mechanical applications range from quantum computers to quantum key distribution to teleportation. In these applications, quantum error correction is extremely important for protecting quantum states against decoherence. Here I present two ma
Externí odkaz:
https://thesis.library.caltech.edu/1873/1/CSAthesisv4.pdf
Autor:
Ahn, Charlene, Birnbaum, Kevin
We address criticism of the Letter "Exposed-Key Weakness of $\alpha \eta$" in the Comment by Nair and Yuen. The Comment claims that the Letter does not show insecurity of $\alpha \eta$ because our approximation for the eavesdropper's entropy on the e
Externí odkaz:
http://arxiv.org/abs/0809.2311
Autor:
Ahn, Charlene, Birnbaum, Kevin
Publikováno v:
Phys. Lett. A 370, 131 (2007)
The $\alpha \eta$ protocol given by Barbosa \emph{et al.}, PRL 90, 227901 (2003) claims to be a secure way of encrypting messages using mesoscopic coherent states. We show that transmission under $\alpha \eta$ exposes information about the secret key
Externí odkaz:
http://arxiv.org/abs/quant-ph/0612058
Publikováno v:
IEEE Trans. Inf. Th. 52(10):4349-4357, 2006.
We consider the problem of distributed compression for correlated quantum sources. The classical version of this problem was solved by Slepian and Wolf, who showed that distributed compression could take full advantage of redundancy in the local sour
Externí odkaz:
http://arxiv.org/abs/quant-ph/0403042
Publikováno v:
Phys. Rev. A 70, 024302(BR) (2004)
It was shown by Ahn, Wiseman, and Milburn [PRA {\bf 67}, 052310 (2003)] that feedback control could be used as a quantum error correction process for errors induced by weak continuous measurement, given one perfectly measured error channel per qubit.
Externí odkaz:
http://arxiv.org/abs/quant-ph/0402067
Publikováno v:
Phys. Rev. A 69, 052324 (2004)
We describe a scheme for quantum error correction that employs feedback and weak measurement rather than the standard tools of projective measurement and fast controlled unitary gates. The advantage of this scheme over previous protocols (for example
Externí odkaz:
http://arxiv.org/abs/quant-ph/0402017
Publikováno v:
Phys. Rev. A 67, 052310 (2003)
We show that quantum feedback control can be used as a quantum error correction process for errors induced by weak continuous measurement. In particular, when the error model is restricted to one, perfectly measured, error channel per physical qubit,
Externí odkaz:
http://arxiv.org/abs/quant-ph/0302006
Publikováno v:
Phys. Rev. A 65, 042301 (2002)
We describe a protocol for continuously protecting unknown quantum states from decoherence that incorporates design principles from both quantum error correction and quantum feedback control. Our protocol uses continuous measurements and Hamiltonian
Externí odkaz:
http://arxiv.org/abs/quant-ph/0110111
Simulation of quantum systems that provide intrinsically fault-tolerant quantum computation is shown to preserve fault tolerance. Errors committed in the course of simulation are eliminated by the natural error-correcting features of the systems simu
Externí odkaz:
http://arxiv.org/abs/quant-ph/9912040