Characterization and control of charge transfer in a tunnel junction

Gabelli, Julien; Thibault, Karl; Gasse, Gabriel; Lupien, Christian; Reulet, Bertrand

doi:10.1002/pssb.201600619

Cited by 5 publications

(8 citation statements)

References 37 publications

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“…34 The basic idea is to attack the problem by working out the Fourier transformation in Eq. (14) within the stationary phase approximation. Here we only outline the procedure, leaving the technical details to the Appendix B.…”

Section: Tuning Distribution Via Voltage Pulsementioning

confidence: 99%

“…7,12,13 Later, Gabelli et al further show that a similar suppression can be realized by using bi-harmonic voltage pulses. 14 Besides, the existence of the electron-hole excitation can also be helpful in certain situation. Moskalets have demonstrated that, driven by the Lorentzian pulse with a half-integer flux, a zero-energy excitation with half-integer charge can be created in the driven Fermi sea at zero temperature, which cannot exist without the presence of electron-hole excitation.…”

Section: Introductionmentioning

confidence: 99%

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On-demand electron source with tunable energy distribution

Yin¹

2018

J. Phys.: Condens. Matter

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We propose a scheme to manipulate the electron-hole excitation in the voltage pulse electron source, which can be realized by a voltage-driven Ohmic contact connecting to a quantum hall edge channel. It has been known that the electron-hole excitation can be suppressed via Lorentzian pulses, leading to noiseless electron current. We show that, instead of the Lorentzian pulses, driven via the voltage pulse [Formula: see text] with duration t , the electron-hole excitation can be tuned so that the corresponding energy distribution of the emitted electrons follows the Fermi distribution with temperature [Formula: see text], with T being the electron temperature in the Ohmic contact. Such Fermi distribution can be established without introducing additional energy relaxation mechanism and can be detected via shot noise thermometry technique, making it helpful in the study of thermal transport and decoherence in mesoscopic system.

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Section: Tuning Distribution Via Voltage Pulsementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On-demand electron source with tunable energy distribution

Yin¹

2018

J. Phys.: Condens. Matter

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“…However, if the fluctuations of an electrical current within one output lead were measured in one experiment, the correlations of currents flowing within both output leads were measured in another. In a sense, these works are the culmination of a number of recent works where the cross-correlation noise was measured to count electrons emitted per period [ 3 , 4 ] to demonstrate a tunable fermionic anti-bunching [ 4 , 5 , 6 , 7 ], and the auto-correlation noise at high [ 8 , 9 ] and low [ 10 , 11 ] frequencies was measured to identify a single-electron emission regime. These experimental advances motivate us to take a closer look at how exactly the quantum properties of wave packets manifest themselves in the measured electrical noise [ 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Auto- versus Cross-Correlation Noise in Periodically Driven Quantum Coherent Conductors

Moskalets¹

2021

Entropy

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Expressing currents and their fluctuations at the terminals of a multi-probe conductor in terms of the wave functions of carriers injected into the Fermi sea provides new insight into the physics of electric currents. This approach helps us to identify two physically different contributions to shot noise. In the quantum coherent regime, when current is carried by non-overlapping wave packets, the product of current fluctuations in different leads, the cross-correlation noise, is determined solely by the duration of the wave packet. In contrast, the square of the current fluctuations in one lead, the autocorrelation noise, is additionally determined by the coherence of the wave packet, which is associated with the spread of the wave packet in energy. The two contributions can be addressed separately in the weak back-scattering regime, when the autocorrelation noise depends only on the coherence. Analysis of shot noise in terms of these contributions allows us, in particular, to predict that no individual traveling particles with a real wave function, such as Majorana fermions, can be created in the Fermi sea in a clean manner, that is, without accompanying electron–hole pairs.

show abstract

“…However, if the fluctuations of an electrical current within one output lead were measured in one experiment, the correlations of currents flowing within both output leads were measured in another. In a sense, these works are the culmination of a number of recent works where the cross-correlation noise was measured to count electrons emitted per period 3,4 , to demonstrate a tunable fermionic anti-bunching [4][5][6][7] , and the auto-correlation noise at high 8,9 and low 10,11 frequencies was measured to identify a single-electron emission regime. These experimental advances stimulate us to take a closer look at how exactly the quantum properties of a wave packet manifest themselves in the measured electrical noise [12][13][14] .…”

Section: Introductionmentioning

confidence: 99%

Auto- versus cross-correlation noise

Moskalets

2020

Preprint

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Charge conservation tightly links the time-averaged fluctuations in electrical currents at the leads of the multi-terminal conductor. However, the ability to dynamically accumulate charge disentangles fluctuations with non-zero frequency in different leads. When current is carried by non-overlapping wave-packets, then the product of current fluctuations in different leads, the cross-correlation noise, is determined solely by the duration of the wave packet. In contrast, the square of the current fluctuations in one lead, the auto-correlation noise, is additionally determined by the coherence of the wave-packet, which is associated with the spread of the wave packet in energy. The two contributions can be addressed separately in the weak back-scattering regime, when the auto-correlation noise depends only on the coherence. Analysis of these contributions allows us to make predictions related to the temperature dependence of noise, and also that no single particles with a real wave function, such as Majorana fermions, can be created in the Fermi sea in a clean manner, that is, without accompanying electron-hole pairs.

show abstract

Characterization and control of charge transfer in a tunnel junction

Cited by 5 publications

References 37 publications

On-demand electron source with tunable energy distribution

On-demand electron source with tunable energy distribution

Auto- versus Cross-Correlation Noise in Periodically Driven Quantum Coherent Conductors

Auto- versus cross-correlation noise

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