Zobrazeno 1 - 10
of 150
pro vyhledávání: '"Alexander Lvovsky"'
Publikováno v:
SSRN Electronic Journal.
Developments in quantum information science rely critically on entanglement, as its distribution between different parties enables quantum communication protocols, such as quantum key distribution or teleportation. This talk focused on two different
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8156bfdd51eb651be7b6ddb55cd918af
https://resolver.caltech.edu/CaltechAUTHORS:20160504-124937057
https://resolver.caltech.edu/CaltechAUTHORS:20160504-124937057
Publikováno v:
AIP Conference Proceedings.
We review an approach to the separability problem using covariance matrices of locally measurable observables. This approach leads to a strong entanglement criterion which we call covariance matrix criterion (CMC). We consider some corollaries of the
Publikováno v:
AIP Conference Proceedings.
Not only preparation of a state but also control of a state via unitary evolution or measurement are important in quantum informatics. Such a control is usually performed by unitary evolution (measurement) of a state as a whole or by evolution of the
High Time Response and Low Dark Count Rate of Multipixel APD Operated at Liquid Nitrogen Temperature
Publikováno v:
AIP Conference Proceedings.
Multipixel silicon avalanche photodiodes (Si APDs) are novel single‐photon detection devices with a high repetition rate and the capability of determining the number of photons. A multipixel Si APD was operated in the Geiger‐mode at liquid nitrog
Publikováno v:
AIP Conference Proceedings.
In this paper we present limitations imposed by sequential attacks on the maximal distance achievable by a differential‐phase‐shift (DPS) quantum key distribution (QKD) protocol with weak coherent pulses. Specifically, we compare the performance
Publikováno v:
AIP Conference Proceedings.
We propose practical near‐optimal quantum receivers for the binary phase shift keyed coherent signals to overcome the homodyne limit in all areas of the signal power. Our schemes consist of Gaussian operations and photon detection and do not requir
Autor:
Nobuyuki Matsuda, Ryosuke Shimizu, Yasuyoshi Mitsumori, Hideo Kosaka, Keiichi Edamatsu, Alexander Lvovsky
Publikováno v:
AIP Conference Proceedings.
We demonstrate the first observation of the cross‐Kerr nonlinearity induced by a single‐photon‐level coherent optical pulse in a photonic crystal fiber. Taking advantage of large nonlinearity and managed dispersion of the optical fiber, we have
Publikováno v:
AIP Conference Proceedings.
We show that a local control of the effective magnetic field in a spin chain allows for an efficient storage of bipartite entanglement and for its transmission “on demand” towards a selected receiving site.