Minimal excitation single-particle emitters: Comparison of charge-transport and energy-transport properties

Dashti, Nastaran; Misiorny, Maciej; Kheradsoud, Sara; Samuelsson, Peter; Splettstoesser, Janine

doi:10.1103/physrevb.100.035405

Cited by 26 publications

(15 citation statements)

References 77 publications

(134 reference statements)

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“…A natural platform where this can be implemented is represented by quantum Hall systems, where chiral edge channels play the role of waveguides and quantum point contacts can be used as beamsplitters. Several theoretical works [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] have investigated various properties of single-electron sources in this regime, and many experimental results [27][28][29][30][31][32][33][34][35][36][37][38] have shown that a high degree of control in the manipulation of single-electron excitations can be achieved. Moreover, extensions to interacting systems [39][40][41][42][43][44][45][46][47][48][49][50][51] have also been considered.…”

Section: Introductionmentioning

confidence: 99%

Influence of channel mixing in fermionic Hong-Ou-Mandel experiments

Acciai,

Roulleau,

Taktak

et al. 2022

Preprint

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We consider an electronic Hong-Ou-Mandel interferometer in the integer quantum Hall regime, where the colliding electronic states are generated by applying voltage pulses (creating for instance Levitons) to ohmic contacts. The aim of this work is to investigate possible mechanisms leading to a reduced visibility of the Pauli dip, i.e., the noise suppression expected for synchronized sources. It is known that electron-electron interactions cannot account for this effect and always lead to a full suppression of the Hong-Ou-Mandel noise. Focusing on the case of filling factor ν = 2, we show instead that a reduced visibility of the Pauli dip can result from mixing of the copropagating edge channels, arising from tunneling events between them.

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Section: Introductionmentioning

confidence: 99%

Influence of channel mixing in fermionic Hong-Ou-Mandel experiments

Acciai,

Roulleau,

Taktak

et al. 2022

Preprint

Self Cite

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“…Several works have explored the possibilities of generating entanglement using dynamic single-electron sources [69][70][71][72][73][74][75][76][77][78]. Heat transport and fluctuations of dynamic single-electron emitters have also been considered [79][80][81][82][83][84] as well as the distribution of waiting times between emitted particles [85][86][87][88][89]. In addition, methods for performing signal processing of quantum electric currents have been developed [90,91], and combinations of voltage pulses and superconductors have been discussed [92,93].…”

Section: Introductionmentioning

confidence: 99%

Multi-Particle Interference in an Electronic Mach–Zehnder Interferometer

Kotilahti

Burset

Moskalets

et al. 2021

Entropy

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The development of dynamic single-electron sources has made it possible to observe and manipulate the quantum properties of individual charge carriers in mesoscopic circuits. Here, we investigate multi-particle effects in an electronic Mach–Zehnder interferometer driven by a series of voltage pulses. To this end, we employ a Floquet scattering formalism to evaluate the interference current and the visibility in the outputs of the interferometer. An injected multi-particle state can be described by its first-order correlation function, which we decompose into a sum of elementary correlation functions that each represent a single particle. Each particle in the pulse contributes independently to the interference current, while the visibility (given by the maximal interference current) exhibits a Fraunhofer-like diffraction pattern caused by the multi-particle interference between different particles in the pulse. For a sequence of multi-particle pulses, the visibility resembles the diffraction pattern from a grid, with the role of the grid and the spacing between the slits being played by the pulses and the time delay between them. Our findings may be observed in future experiments by injecting multi-particle pulses into a Mach–Zehnder interferometer.

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“…Indeed, it has been measured that these voltage pulses, called Levitons, produce zero excess noise, equivalent to the absence of extra electron-hole pairs [21,49]. Levitons are currently on the spotlight in EQO and an intense research activity dealing with their peculiar properties is being carried out [66][67][68][69][70][71][72][73][74][75][76][77][78][79].…”

Section: Introductionmentioning

confidence: 99%

Spectral properties of interacting helical channels driven by Lorentzian pulses

et al. 2019

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Precise shaping of coherent electron sources allows the controlled creation of wavepackets into a one dimensional (1D) quantum conductor. Periodic trains of Lorentzian pulses have been shown to induce minimal excitations without creating additional electron-hole pairs in a single non-interacting 1D electron channel. The presence of electron-electron (e-e) interactions dramatically affects the non-equilibrium dynamics of a 1D system. Here, we consider the intrinsic spectral properties of a helical liquid, with a pair of counterpropagating interacting channels, in the presence of timedependent Lorentzian voltage pulses. We show that peculiar asymmetries in the behavior of the spectral function are induced by interactions, depending on the sign of the injected charges. Moreover, we discuss the robustness of the concept of minimal excitations in the presence of interactions, where the link with excess noise is no more straightforward. Finally, we propose a scanning tunneling microscope setup to spectroscopically access and probe the non-equilibrium behavior induced by the voltage drive and e-e interactions. This allows a diagnosis of fractional charges in a correlated quantum spin Hall liquid in the presence of time-dependent drives.

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Minimal excitation single-particle emitters: Comparison of charge-transport and energy-transport properties

Cited by 26 publications

References 77 publications

Influence of channel mixing in fermionic Hong-Ou-Mandel experiments

Influence of channel mixing in fermionic Hong-Ou-Mandel experiments

Multi-Particle Interference in an Electronic Mach–Zehnder Interferometer

Spectral properties of interacting helical channels driven by Lorentzian pulses

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