Abstract
The qubit (or a system of two quantum dots) has become a standard paradigm for studying quantum information processes. Our focus is decoherence due to interaction of the qubit with its environment, leading to noise. We consider quantum noise generated by a dissipative quantum bath. A detailed comparative study with the results for a classical noise source such as generated by a telegraph process, enables us to set limits on the applicability of this process vis à vis its quantum counterpart, as well as lend handle on the parameters that can be tuned for analysing decoherence. Both Ohmic and non-Ohmic dissipations are treated and appropriate limits are analysed for facilitating comparison with the telegraph process.
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KAMIL, E., DATTAGUPTA, S. Dephasing of a qubit due to quantum and classical noise. Pramana - J Phys 79, 357–376 (2012). https://doi.org/10.1007/s12043-012-0322-5
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DOI: https://doi.org/10.1007/s12043-012-0322-5