Approximate quantum data storage and teleportation

Details Approximate quantum data storage and teleportation Approximate quantum data storage and teleportation

2002-01-08

arxiv.org/abs/quant-ph/0201023v3

Physics

Quantum Physics

More detailed discussion of teleportation of entangled and mixed states. Added reference to work by Banaszek. 8 pages, 1 figur

Scientific paper

10.1103/PhysRevA.65.062313

In this paper we present an optimal protocol by which an unknown state on a Hilbert space of dimension $N$ can be approximately stored in an $M$-dimensional quantum system or be approximately teleported via an $M$-dimensional quantum channel. The fidelity of our procedure is determined for pure states as well as for mixed states and states which are entangled with auxiliary quantum systems of varying Hilbert space dimension, and it is compared with theoretical results for the maximally achievable fidelity.

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