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Title: Entanglement, nonlocality, postselection and thermodynamics
Author: Silva, Ralph Francisco
ISNI:       0000 0004 5918 0675
Awarding Body: University of Bristol
Current Institution: University of Bristol
Date of Award: 2015
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In this second part of the thesis, we turn to the study of thermodynamics at the quantum scale, with a special focus on small thermal machines. To begin with, in Chapter 4, we look at the concept of a virtual temperature, as introduced in [43]. This is a temperature calculated for any pair of energy levels in a diagonal state by matching the ratio of its populations to the Gibbs state. The small quantum fridge introduced in Chapter 5, as well as all of the other small quantum thermal machines may be understood in terms of the virtual temperatures that they are able to generate within a system. We use the concept of virtual temperatures to construct an elegant and illuminating proof of the notion of complete passivity. A passive state [44] is one from which no work may be extracted from a unitary, while complete passivity refers to the property that no work can be extracted from multiple copies of a state.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available