Observation of "Partial Coherence" in an Aharonov-Bohm Interferometer with a Quantum Dot

Abstract

We report experiments on the interference through spin states of electrons in a quantum dot (QD) embedded in an Aharonov-Bohm (AB) interferometer. We have picked up a spin-pair state, for which the environmental conditions are ideally similar and have traced the AB amplitude in the range of the gate voltage that covers the pair. The behavior of the asymmetry in the amplitude around the two Coulomb peaks agrees with the theoretical prediction that relates a spin-flip process in a QD to the quantum dephasing of electrons. These results consist evidence of "partial coherence" due to an entanglement of spins in the QD and the interferometer.

4 pages, 3 figures, RevTeX

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Cited by in corpus (25)

• Fano resonances in nanoscale structures
• Fano Resonance in a Quantum Wire with a Side-coupled Quantum Dot
• Observation of the Fano-Kondo Anti-Resonance in a Quantum Wire with a Side-Coupled Quantum Dot
• Decoherence and lead induced inter-dot coupling in nonequilibrium electron transport through interacting quantum dots: A hierarchical quantum master equation approach
• Decoherence of transported spin in multichannel spin-orbit coupled spintronic devices: Scattering approach to spin density matrix from the ballistic to the localized regime
• Modulating Unpolarized Current in Quantum Spintronics: Visibility of Spin-Interference Effects in Multichannel Aharonov-Casher Mesoscopic Rings
• The formation of nonequilibrium steady states in interacting double quantum dots: When coherences dominate the charge distribution
• Vibrationally Induced Decoherence in Single-Molecule Junctions
• Coulomb-interaction effects in full counting statistics of a quantum-dot Aharonov-Bohm interferometer
• Controlled dephasing in single-dot Aharonov-Bohm interferometers
• Universal zero-bias conductance through a quantum wire side-coupled to a quantum dot
• Non-universal transmission phase behaviour of a large quantum dot
• Carrier-carrier entanglement and transport resonances in semiconductor quantum dots
• Interference and interaction effects in adiabatic pumping through quantum dots
• Do intradot electron-electron interactions induce dephasing?
• Transient probing of the symmetry and the asymmetry of electron interference
• Spin-dependent transport through quantum-dot Aharonov-Bohm interferometers
• Spin-flip Effects in the Mesoscopic Spin-Interferometer
• Dephasing of electrons in the Aharonov-Bohm interferometer with a single-molecular vibrational junction
• Phase-controlled heat modulation with Aharonov-Bohm interferometers
• Conductance Phases in Aharonov-Bohm Ring Quantum Dots
• Comment on "Do Intradot Electron-Electron Interactions Induce Dephasing?"
• Electronic interferometer capacitively coupled to a quantum dot
• Transfer-matrix summation of path integrals for transport through nanostructures
• Impact of electron-phonon coupling on electron transport through T-shaped arrangements of quantum dots in the Kondo regime