Coherent detection of electron dephasing

Abstract

We show that an Aharonov-Bohm (AB) ring with asymmetric electron injection can act as a coherent detector of electron dephasing. The presence of a dephasing source in one of the two arms of a moderately-to-highly asymmetric ring changes the response of the system from total reflection to complete transmission while preserving the coherence of the electrons propagating from the ring, even for strong dephasing. We interpret this phenomenon as an implementation of an interaction-free measurement.

4 pages, 3 figures

References in corpus (4)

• Influence of dephasing on shot noise in an electronic Mach-Zehnder interferometer
• Interaction-free measurements with superconducting qubits
• Dephasing in sequential tunneling through a double-dot interferometer
• Impact of classical forces and decoherence in multi-terminal Aharonov-Bohm networks

Cited by in corpus (9)

• Tuning the Aharonov-Bohm effect with dephasing in nonequilibrium transport
• Electronic implementations of Interaction-Free Measurements
• Tuning Fano resonances by magnetic forces for electron transport through a quantum wire side-coupled to a quantum ring
• Magnetic forces and localized resonances in electron transfer through quantum rings
• Many-body manifestation of interaction-free measurement: the Elitzur-Vaidman bomb
• Anomalous magnetotransport through reflection-symmetric artificial molecules
• The quantum mechanics is a non-universal theory. The realistic Schrodinger's and positivistic Born's interpretation of the wave function
• Interaction-free measurement with mesoscopic devices on a GaAs/AlGaAs heterostructure
• The fundamental obscurity in quantum mechanics. Could the problem be considered universal?