TY - JOUR
T1 - Dephasing and the Orthogonality Catastrophe in Tunneling through a Quantum Dot
T2 - The “Which Path?” Interferometer
AU - Aleiner, I. L.
AU - Wingreen, Ned S.
AU - Meir, Yigal
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1997/11/10
Y1 - 1997/11/10
N2 - The “Which Path?” interferometer consists of an Aharonov-Bohm ring with a quantum dot (QD) built in one of its arms, and an additional quantum point contact (QPC) located close to the QD. The transmission coefficient of the QPC depends on the charge state of the QD. Hence the point contact acts as a controllable measurement device for which path an electron takes through the ring. We calculate the suppression of the Aharonov-Bohm oscillations which is caused by both measurement dephasing and the orthogonality catastrophe, i.e., respectively, by real and virtual electron-hole pair creation at the QPC.
AB - The “Which Path?” interferometer consists of an Aharonov-Bohm ring with a quantum dot (QD) built in one of its arms, and an additional quantum point contact (QPC) located close to the QD. The transmission coefficient of the QPC depends on the charge state of the QD. Hence the point contact acts as a controllable measurement device for which path an electron takes through the ring. We calculate the suppression of the Aharonov-Bohm oscillations which is caused by both measurement dephasing and the orthogonality catastrophe, i.e., respectively, by real and virtual electron-hole pair creation at the QPC.
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U2 - 10.1103/PhysRevLett.79.3740
DO - 10.1103/PhysRevLett.79.3740
M3 - Article
AN - SCOPUS:0001102234
SN - 0031-9007
VL - 79
SP - 3740
EP - 3743
JO - Physical review letters
JF - Physical review letters
IS - 19
ER -