Enhancement of transmission rates in quantum memory channels with damping

Details Enhancement of transmission rates in quantum memory channels with damping Enhancement of transmission rates in quantum memory channels with damping

2009-03-08

arxiv.org/abs/0903.1424v1

Phys. Rev. Lett. 103, 020502 (2009)

Physics

Quantum Physics

5 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.103.020502

We consider the transfer of quantum information down a single-mode quantum transmission line. Such quantum channel is modeled as a damped harmonic oscillator, the interaction between the information carriers -a train of N qubits- and the oscillator being of the Jaynes-Cummings kind. Memory effects appear if the state of the oscillator is not reset after each channel use. We show that the setup without resetting is convenient in order to increase the transmission rates, both for the transfer of quantum and classical private information. Our results can be applied to the micromaser.

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