Universal quantum limits on single channel information, entropy and heat flow

Details Universal quantum limits on single channel information, entropy and heat flow Universal quantum limits on single channel information, entropy and heat flow

2000-01-05

arxiv.org/abs/quant-ph/0001007v2

Phys. Rev. A 62, 052104 (2000)

Physics

Quantum Physics

4 figures added; minor changes to text. To appear in Phys. Rev. A, Vol. 62, Nov. 2000

Scientific paper

10.1103/PhysRevA.62.052104

We show that the recently discovered universal upper bound on the thermal conductance of a single channel comprising particles obeying arbitrary fractional statistics is in fact a consequence of a more general universal upper bound, involving the averaged entropy and energy currents of a single channel connecting heat reservoirs with arbitrary temperatures and chemical potentials. The latter upper bound in turn leads, via Holevo's theorem, to a universal (i.e., statistics independent) upper bound on the optimum capacity for classical information transmission down a single, wideband quantum channel.

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