Abstract
Two-level systems(TLS) appear very frequently in condensed matter physics. Historically, they have been introduced by Anderson et al. [1] in order to explain the linear specific heat observed in metallic and spin glasses. The so called “1/f” noise observed in macroscopic or mesoscopic conductors is generally attributed to the presence of a large number of such fluctuators. Recently, it has been proposed that they would also be responsible for quantum dephasing at low temperature [2, 3].
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van den Brom, H.E., Noat, Y., van Ruitenbeek, J.M. (2001). Two-Level Systems in Atomic-Size Point Contacts. In: Chandrasekhar, V., Van Haesendonck, C., Zawadowski, A. (eds) Kondo Effect and Dephasing in Low-Dimensional Metallic Systems. NATO Science Series, vol 50. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0427-5_35
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DOI: https://doi.org/10.1007/978-94-010-0427-5_35
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