Abstract
A quantum channel teleporting qubits from Alice to Bob is considered in which the bipartite resource state shared by Alice and Bob is affected by bilocal thermal noise treated in rigorous Davis approximation. Specific conditions are identified where the fidelity of the teleportation channel can be either independent of temperature or even enhanced by the temperature of the environment.
Highlights
Teleportation [5] is probably the most spectacular application of quantum entanglement [12]
There are certain conditions imposed on both environment and ρA where the fidelity of teleportation channel is enhanced by the growth of the temperature
We investigated the fidelity of qubit teleportation channel in the regime when the shared entangled resource state was affected by thermal fluctuations caused by independent thermal reservoirs, modeled in terms of Davis maps
Summary
Teleportation [5] is probably the most spectacular application of quantum entanglement [12]. Performing realistic teleportation, one is faced with omnipresent decoherence [16]; especially the resource state χAB, waiting for being used, suffers from interaction with environment and resulting noise. In such a situation, despite related information loss, effective teleportation is not excluded [2,6,11,13,16,18]. We assume that the decoherence affecting χAB is due to thermal environments. There are certain conditions imposed on both environment and ρA where the fidelity of teleportation channel is enhanced by the growth of the temperature.
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