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    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/106181

    Title: Mode Dependency of Quantum Decoherence Studied via an Aharonov-Bohm Interferometer
    Authors: Tung-Sheng Lo;Yiping Lin;Phillip M. Wu;Dah-Chin Ling;C. C. Chi;Jeng-Chung Chen
    Keywords: ballistic one-dimensional transport;Aharonov-Bohm interferometer;quantum coherence
    Date: 2016/02/24
    Issue Date: 2016-04-22 13:23:26 (UTC+8)
    Abstract: We investigate the dependence of decoherence on the mode number M in a multiple-mode Aharonov-
    Bohm (AB) interferometer. The design of the AB interferometer allows us to precisely determine M by the
    additivity rule of ballistic conductors; meanwhile, the decoherence rate is simultaneously deduced by the
    variance of the AB oscillation amplitude. The AB amplitude decreases and fluctuates with depopulating
    M. Moreover, the normalized amplitude exhibits a maximum at a specific M (∼9). Data analysis reveals
    that the charge-fluctuation-induced dephasing, which depends on the geometry and the charge relaxation
    resistance of the system, could play an essential role in the decoherence process. Our results suggest that the
    phase coherence, in principle, can be optimized using a deliberated design and pave one of the ways toward
    the engineering of quantum coherence.
    Relation: Physical Review Letters 116(8), pp.080401
    DOI: 10.1103/PhysRevLett.116.080401
    Appears in Collections:[Graduate Institute & Department of Physics] Journal Article

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