TY - JOUR
T1 - Dephasing in a Mach-Zehnder Interferometer by an Ohmic Contact
AU - Idrisov, Edvin G.
AU - Levkivskyi, Ivan P.
AU - Sukhorukov, Eugene V.
N1 - Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/7/9
Y1 - 2018/7/9
N2 - We study dephasing in an electronic Mach-Zehnder (MZ) interferometer based on quantum Hall edge states by a micrometer-sized Ohmic contact embedded in one of its arms. We find that at the filling factor ν=1, as well as in the case where an Ohmic contact is connected to a MZ interferometer by a quantum point contact that transmits only one electron channel, the phase coherence may not be fully suppressed. Namely, if the voltage bias Δμ and the temperature T are small compared to the charging energy of the Ohmic contact EC, the free fermion picture is manifested, and the visibility saturates at its maximum value. At large biases, ΔμEC, the visibility decays in a power-law manner.
AB - We study dephasing in an electronic Mach-Zehnder (MZ) interferometer based on quantum Hall edge states by a micrometer-sized Ohmic contact embedded in one of its arms. We find that at the filling factor ν=1, as well as in the case where an Ohmic contact is connected to a MZ interferometer by a quantum point contact that transmits only one electron channel, the phase coherence may not be fully suppressed. Namely, if the voltage bias Δμ and the temperature T are small compared to the charging energy of the Ohmic contact EC, the free fermion picture is manifested, and the visibility saturates at its maximum value. At large biases, ΔμEC, the visibility decays in a power-law manner.
UR - http://www.scopus.com/inward/record.url?scp=85049883514&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85049883514&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.121.026802
DO - 10.1103/PhysRevLett.121.026802
M3 - Article
C2 - 30085740
AN - SCOPUS:85049883514
SN - 0031-9007
VL - 121
JO - Physical Review Letters
JF - Physical Review Letters
IS - 2
M1 - 026802
ER -