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Persistent currents controlled by non-classical electromagnetic fields

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Języki publikacji
EN
Abstrakty
EN
Mesoscopic systems and the non-classical electromagnetic fields are of central importance for quantum information processing. Our aim is to present the significant influence of the non-classical radiation on the properties of persistent currents. We study mesoscopic rings subject to both classical and non-classical electromagnetic field. Our discussion is limited to one- and two-mode fields with a prepared in a given quantum state. We show that the non-classical fields with definite phase can induce persistent currents even in the absence of classical driving. There are two qualitatively distinct classes of two-mode electromagnetic fields: separable and entangled. This is reflected in the properties of the current which e.g. become time-dependent for the fields in an entangled state. We extend our earlier work and investigate the effect of entanglement for the family of various states with various amount of entanglement: from separable to Bell states quantified by the concurrence.
Rocznik
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769--775
Opis fizyczny
Bibliogr. 9 poz.
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autor
autor
Bibliografia
  • [1] DAJKA J., SZOPA M., VOURDAS A., ZIPPER E., Phys. Rev. B, 69 (2004), 045305.
  • [2] DAJKA J., SZOPA M., VOURDAS A., ZIPPER E., Phys. Stat. Sol. (b), 242 (2005), 296.
  • [3] BUTTIKER M., IMRY Y., LANDAUER R., Phys. Lett. A, 96 (1983), 365; ECKERN U., SCHWAB P., J. Low Temp. Phys., 126 (2002), 1291.
  • [4] CHEUNG H.F., GEFEN Y., RIEDEL E.K., SHIH W.H., Phys. Rev. B, 37 (1988), 6050.
  • [5] VOURDAS A., Phys. Rev. B, 49 (1994), 12040.
  • [6] LUISELL W.H., Quantum Statistical Properties of Radiation, Wiley, New York, 1973.
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  • [9] WOOTERS W.K., Phys. Rev. Lett., 78 (1998), 5022; LEVAY P., quant-ph/0306115v1 (2003).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPW1-0021-0037
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