Aspects of quantum coherence in nanosystems

Brendon W. Lovett, Ahsan Nazir

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    Coherence is a familiar concept in physics. It is the driving force behind wavelike phenomena such as the diffraction of light. Moreover, wave-particle duality implies that all quantum objects can exhibit coherence, and this quantum coherence is crucial to understanding the behaviour of a plethora of systems. In this paper, which is written at an undergraduate level, we shall briefly introduce what is meant by coherence in a well-known classical setting, before going on to describe its quantum version. We will show that coherence is important in describing the properties of solid-state nanosystems and especially quantum dots. Simple experiments that reveal the coherent nature of matter - and how this leads to some very powerful applications - will be described. Finally, we shall discuss the fragility of coherence and shall introduce a method for describing decoherence in open quantum systems. © 2009 IOP Publishing Ltd.
    Original languageEnglish
    Pages (from-to)S89-S100
    JournalEuropean Journal of Physics
    Issue number4
    Publication statusPublished - Jul 2009

    Research Beacons, Institutes and Platforms

    • Photon Science Institute


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