# Probe-configuration dependent dephasing in a mesoscopic interferometer

@article{Seelig2003ProbeconfigurationDD, title={Probe-configuration dependent dephasing in a mesoscopic interferometer}, author={Georg Seelig and Sebastian Pilgram and Andrew N. Jordan and Markus Buttiker}, journal={Physical Review B}, year={2003}, volume={68}, pages={161310} }

Dephasing in a ballistic four-terminal Aharonov-Bohm geometry due to charge and voltage fluctuations is investigated. Treating two terminals as voltage probes, we find a strong dependence of the dephasing rate on the probe configuration in agreement with a recent experiment by Kobayashi et al. (J. Phys. Soc. Jpn. 71, 2094 (2002)). Voltage fluctuations in the measurement circuit are shown to be the source of the configuration dependence.

#### 22 Citations

Voltage and dephasing probes in mesoscopic conductors: A study of full-counting statistics

- Physics
- 2007

Voltage and dephasing probes introduce incoherent inelastic and incoherent quasielastic scattering into a coherent mesoscopic conductor. We discuss in detail the concepts of voltage and dephasing… Expand

Influence of dephasing on shot noise in an electronic Mach-Zehnder interferometer.

- Physics, Medicine
- Physical review letters
- 2004

The dependence on the power spectrum of the field, which is impossible in simpler approaches such as the dephasing terminal, is studied and remarked on as a tool to distinguish thermal smearing from genuine dephase. Expand

Nonlocal Aharonov–Bohm conductance oscillations in an asymmetric quantum ring

- Physics
- 2009

We investigate ballistic transport and quantum interference in a nanoscale quantum wire loop fabricated as a GaAs/AlGaAs field-effect heterostructure. Four-terminal measurements of current and… Expand

Mesoscopic Fano effect in a quantum dot embedded in an Aharonov-Bohm ring

- Physics
- 2003

The Fano effect, which occurs through the quantum-mechanical cooperation between resonance and interference, can be observed in electron transport through a hybrid system of a quantum dot and an… Expand

Noise and measurement efficiency of a partially coherent mesoscopic detector

- Physics
- 2004

We study the noise properties and efficiency of a mesoscopic resonant-level conductor which is used as a quantum detector, in the regime where transport through the level is only partially phase… Expand

Dephasing due to electron-electron interaction in a diffusive ring

- Physics
- 2005

We study the effect of the electron-electron interaction on the weak localization correction of a ring pierced by a magnetic flux. We compute exactly the path integral giving the magnetoconductivity… Expand

Interaction and phase relaxation in disordered nanowires and quantum hall systems

- Physics
- 2006

This thesis investigates the interplay of electron-electron interaction and disorder in mesoscopic systems. The suppression of Aharonov-Bohm oscillations in metallic rings is calculated using the… Expand

Single-electron coherence: Finite temperature versus pure dephasing

- Physics
- 2016

Abstract We analyze a coherent injection of single electrons on top of the Fermi sea in two situations, at finite-temperature and in the presence of pure dephasing. Both finite-temperature and pure… Expand

Current–voltage correlations in interferometers

- Physics
- 2007

We investigate correlations of current at contacts and voltage fluctuations at voltage probes coupled to interferometers. The results are compared with correlations of current and occupation number… Expand

Fano resonance in a quantum wire with a side-coupled quantum dot

- Physics
- 2004

We report a transport experiment on the Fano effect in a quantum connecting wire (QW) with a side-coupled quantum dot (QD). The Fano resonance occurs between the QD and the "T-shaped" junction in the… Expand

#### References

SHOWING 1-10 OF 23 REFERENCES

Charge-fluctuation-induced dephasing in a gated mesoscopic interferometer

- Physics
- 2001

The reduction of the amplitude of Aharonov-Bohm oscillations in a ballistic one-channel mesoscopic interferometer due to charge fluctuations is investigated. In the arrangement considered the… Expand

Aharonov-Bohm oscillations of a tuneable quantum ring

- Chemistry, Physics
- 2002

Using an atomic force microscope a ring geometry with self-aligned in-plane gates was directly written into a GaAs/AlGaAs heterostructure. Transport measurements in the open regime show only one… Expand

Nonlocal electrical properties in mesoscopic devices

- Physics
- 1987

The magnetoconductance of nominally identical, 2‐μm‐long, Au lines has been measured. A 0.7‐μm‐diam loop was attached to the end of one of the lines outside the probes in such a way that classically… Expand

Four-terminal phase-coherent conductance.

- Physics, Medicine
- Physical review letters
- 1986

A conductance formula for a sample of arbitrary shape with four terminals is derived to describe transport in the limit where carriers can traverse the sample without suffering phase-destroying… Expand

Probe-Configuration-Dependent Decoherence in an Aharonov–Bohm Ring

- Physics
- 2002

We have measured transport through mesoscopic Aharonov–Bohm (AB) rings with two different four-terminal configurations. While the amplitude and the phase of the AB oscillations are explained well w...

Dephasing of the Quantum Interference Effect in Open Ballistic Billiards

- Physics
- 2002

Quantum interference corrections to conductance are suppressed by the dephasing due to electron-electron interactions. The dephasing in open ballistic billiards is studied at low temperatures. It is… Expand

Temperature dependence of the Aharonov-Bohm oscillations and the energy spectrum in a single-mode ballistic ring

- Physics
- 2000

The temperature dependence of the amplitude of the Aharonov-Bohm ~AB! oscillations in a single mode ballistic ring has been measured. The experimental data is analyzed using the exact energy spectrum… Expand

Temperature-dependent third cumulant of tunneling noise.

- Physics, Medicine
- Physical review letters
- 2003

In the limit of a noninvasive (zero-impedance) measurement circuit in thermal equilibrium with the junction, it is found that the third cumulant crosses over from e(2)I at low temperatures to -e(2]I at high temperatures. Expand

Coulomb-induced positive current-current correlations in normal conductors

- Physics, Medicine
- Physical review letters
- 2000

It is shown that current fluctuations at capacitive contacts induced via the long range Coulomb interaction due to charge fluctuations in the mesoscopic sample can be positively correlated. Expand

An electronic Mach–Zehnder interferometer

- Physics, Medicine
- Nature
- 2003

This device is the first electronic analogue of the optical Mach–Zehnder interferometer, and opens the way to measuring interference of quasiparticles with fractional charges, and is highly sensitive and exhibits very high visibility. Expand