Linear-optics realization of channels for single-photon multimode qudits

Autor(en)

Marco Piani, David Pitkanen, Rainer Kaltenbaek, Norbert Luetkenhaus

Abstrakt

We propose and theoretically study a method for the stochastic realization of arbitrary quantum channels on multimode single-photon qudits. In order for our method to be undemanding in its implementation, we restrict our analysis to linear-optical techniques, vacuum ancillary states, and nonadaptive schemes, but we allow for random switching between different optical networks. With our method it is possible to deterministically implement random-unitary channels and to stochastically implement general channels. We provide an expression for the optimal probability of success of our scheme and calculate this quantity for specific examples such as the qubit amplitude-damping channel. The success probability is shown to be related to the entanglement properties of the Choi-Jamiołkowski state isomorphic to the channel.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

University of Waterloo (UW)

Journal

Physical Review A

Band

84

Anzahl der Seiten

11

ISSN

1050-2947

DOI

https://doi.org/10.1103/PhysRevA.84.032304

Publikationsdatum

09-2011

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/561c9082-7c33-4d2e-892b-ad25df586590