Correlations, quantum entanglement and interference in nanoscopic systems

Hallberg, K and Rincon, Julian and Nizama, M and Aligia, AA and Ramasesha, S (2010) Correlations, quantum entanglement and interference in nanoscopic systems. In: Journal of Statistical Mechanics: Theory and Experiment .

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Abstract

Several of the most interesting quantum effects can or could be observed in nanoscopic systems. For example, the effect of strong correlations between electrons and of quantum interference can be measured in transport experiments through quantum dots, wires, individual molecules and rings formed by large molecules or arrays of quantum dots. In addition, quantum coherence and entanglement can be clearly observed in quantum corrals. In this paper we present calculations of transport properties through Aharonov-Bohm strongly correlated rings where the characteristic phenomenon of charge-spin separation is clearly observed. Additionally quantum interference effects show up in transport through pi-conjugated annulene molecules producing important effects on the conductance for different source-drain configurations, leading to the possibility of an interesting switching effect. Finally, elliptic quantum corrals offer an ideal system to study quantum entanglement due to their focalizing properties. Because of an enhanced interaction between impurities localized at the foci, these systems also show interesting quantum dynamical behaviour and offer a challenging scenario for quantum information experiments.

Item Type:	Journal Article
Publication:	Journal of Statistical Mechanics: Theory and Experiment
Publisher:	IOP Publishing ltd
Additional Information:	Copyright of this article belongs to IOP Publishing ltd.
Keywords:	mesoscopic systems (theory); entanglement in extended quantum systems (theory); quantum transport in one dimension
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	24 Mar 2011 06:37
Last Modified:	24 Mar 2011 06:37
URI:	http://eprints.iisc.ac.in/id/eprint/36186

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