TY - JOUR
T1 - Broken Unitarity and Phase Measurements in Aharonov-Bohm Interferometers
AU - Entin-Wohlman, O.
AU - Aharony, A.
AU - Imry, Y.
AU - Levinson, Y.
AU - Schiller, A.
PY - 2002
Y1 - 2002
N2 - Aharonov-Bohm mesoscopic solid-state interferometers yield a conductance which contains a term [Formula presented], where [Formula presented] relates to the magnetic flux. Experiments with a quantum dot on one of the interfering paths aim to relate [Formula presented] to the dot’s intrinsic Friedel transmission phase [Formula presented]. For closed systems, which conserve the electron current (unitarity), the Onsager relation requires that [Formula presented] or [Formula presented]. For open systems, we show that in general [Formula presented] depends on the details of the broken unitarity. Although it gives information on the resonances of the dot, [Formula presented] is generally not equal to [Formula presented]. A direct relation between [Formula presented] and [Formula presented] requires specific ways of opening the system, which are discussed.
AB - Aharonov-Bohm mesoscopic solid-state interferometers yield a conductance which contains a term [Formula presented], where [Formula presented] relates to the magnetic flux. Experiments with a quantum dot on one of the interfering paths aim to relate [Formula presented] to the dot’s intrinsic Friedel transmission phase [Formula presented]. For closed systems, which conserve the electron current (unitarity), the Onsager relation requires that [Formula presented] or [Formula presented]. For open systems, we show that in general [Formula presented] depends on the details of the broken unitarity. Although it gives information on the resonances of the dot, [Formula presented] is generally not equal to [Formula presented]. A direct relation between [Formula presented] and [Formula presented] requires specific ways of opening the system, which are discussed.
UR - http://www.scopus.com/inward/record.url?scp=84907379284&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.88.166801
DO - 10.1103/PhysRevLett.88.166801
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AN - SCOPUS:84907379284
SN - 0031-9007
VL - 88
SP - 4
JO - Physical Review Letters
JF - Physical Review Letters
IS - 16
ER -