Spectroscopy of electron flows with single- and two-particle emitters

Abstract

To analyze the state of injected carrier streams of different electron sources, we propose to use correlation measurements at a quantum point contact with the different sources connected via chiral edge states to the two inputs. In particular we consider the case of an on-demand single-electron emitter correlated with the carriers incident from a biased normal reservoir, a contact subject to an alternating voltage and a stochastic single electron emitter. The correlation can be viewed as a spectroscopic tool to compare the states of injected particles of different sources. If at the quantum point contact the amplitude profiles of electrons overlap, the noise correlation is suppressed. In the absence of an overlap the noise is roughly the sum of the noise powers due to the electron streams in each input. We show that the electron state emitted from a (dc or ac) biased metallic contact is different from a Lorentzian amplitude electron state emitted by the single electron emitter (a quantum capacitor driven with slow harmonic potential), since with these inputs the noise correlation is not suppressed. In contrast, if quantized voltage pulses are applied to a metallic contact instead of a dc (ac) bias then the noise can be suppressed. We find a noise suppression for multi-electron pulses and for the case of stochastic electron emitters for which the appearance of an electron at the quantum point contact is probabilistic.

Main part: 6 pages, 5 figures. Appendices: 7 pages, 1 figure

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Cited by in corpus (28)

• Electron quantum optics in ballistic chiral conductors
• Clock-controlled emission of single-electron wavepackets in a solid-state circuit
• Integer and fractional charge Lorentzian voltage pulses analyzed in the frame of Photon-assisted Shot Noise
• Electron quantum optics in quantum Hall edge channels
• Current Correlations from a Mesoscopic Anyon Collider
• Interactions and charge fractionalization in an electronic Hong-Ou-Mandel interferometer
• Wigner function approach to single electron coherence in quantum Hall edge channels
• Time-of-Flight Measurements of Single-Electron Wave Packets in Quantum-Hall Edge States
• Fractionalization of minimal excitations in integer quantum Hall edge channels
• Electron and hole Hong-Ou-Mandel interferometry
• Energy and power fluctuations in ac-driven coherent conductors
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• Single-electron coherence: finite temperature versus pure dephasing
• Transport phenomena in helical edge states interferometers. A Green's function approach
• Collisional interferometry of Levitons in quantum Hall edge channels at $\nu =2$
• Heat and charge transport measurements to access single-electron quantum characteristics
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• Control of electron-hole pair generation by biharmonic voltage drive of a quantum point contact
• Minimal-excitation single-particle emitters: A comparison of charge and energy transport properties
• Noise of a single-electron emitter
• Single-particle shot noise at non-zero temperature
• Composite two-particle sources
• Multi-particle interference in an electronic Mach-Zehnder interferometer
• Dephasing in single-electron generation due to environmental noise probed by Hong Ou Mandel interferometry
• Electron interferometry in integer quantum Hall edge channels
• Auto- versus cross-correlation noise