Injection locking of a semiconductor double-quantum-dot micromaser

Liu, Y.-Y.; Stehlik, J.; Gullans, Michael; Petta, J. R.

doi:10.1103/physreva.92.053802

Cited by 26 publications

(41 citation statements)

References 55 publications

(83 reference statements)

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“…First, we demonstrate that the oscillator can be locked to a stable but weak seed tone applied to the gate 30,31 . This phenomenon of injection locking, previously demonstrated for trapped ions 32 and driven mechanical resonators 33 , arises because feedback amplifies small forces Histograms of total power V 2 (t) = V 2 I (t) + V 2 Q (t) below and above threshold, corresponding to the joint histograms in b, c. The former is scaled downwards for clarity.…”

Section: Stabilised Oscillationsmentioning

confidence: 99%

A coherent nanomechanical oscillator driven by single-electron tunnelling

et al. 2019

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A single-electron transistor incorporated as part of a nanomechanical resonator represents an extreme limit of electron-phonon coupling. While it allows for fast and sensitive electromechanical measurements, it also introduces backaction forces from electron tunnelling which randomly perturb the mechanical state. Despite the stochastic nature of this backaction, under conditions of strong coupling it is predicted to create self-sustaining coherent mechanical oscillations. Here, we verify this prediction using time-resolved measurements of a vibrating carbon nanotube transistor. This electromechanical oscillator has intriguing similarities with a laser. The single-electron transistor, pumped by an electrical bias, acts as a gain medium while the resonator acts as a phonon cavity. Despite the unconventional operating principle, which does not involve stimulated emission, we confirm that the output is coherent, and demonstrate other laser behaviour including injection locking and frequency narrowing through feedback. arXiv:1903.04474v1 [cond-mat.mes-hall]

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Section: Stabilised Oscillationsmentioning

confidence: 99%

A coherent nanomechanical oscillator driven by single-electron tunnelling

et al. 2019

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“…4(e)]. So far, with quantum dot circuits coupled to cavities, photon emission has been obtained only due to tunneling between two discrete dot levels [13][14][15][16].…”

Section: Negative Photon Damping By a N-dot-s Bijunctionmentioning

confidence: 99%

“…In practice, nanoconductors can be tunnel-coupled to various types of fermionic reservoirs such as normal metals and superconductors [76], but also ferromagnets with collinear [18,77] or noncollinear magnetizations [17,78]. These different elements can be combined in a large variety of geometries, involving, for instance, interdot hopping [6][7][8][9][10][11][12][13][14][15][16][17] and multiterminal contacting [77,79]. In this context, we generalize our approach to geometries with several quantum dots or sites or several orbitals.…”

Section: Summary Extension Of Our Theory and Perspectivesmentioning

confidence: 99%

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Cavity Photons as a Probe for Charge Relaxation Resistance and Photon Emission in a Quantum Dot Coupled to Normal and Superconducting Continua

et al. 2016

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Microwave cavities have been widely used to investigate the behavior of closed few-level systems. Here, we show that they also represent a powerful probe for the dynamics of charge transfer between a discrete electronic level and fermionic continua. We have combined experiment and theory for a carbon nanotube quantum dot coupled to normal metal and superconducting contacts. In equilibrium conditions, where our device behaves as an effective quantum dot-normal metal junction, we approach a universal photon dissipation regime governed by a quantum charge relaxation effect. We observe how photon dissipation is modified when the dot admittance turns from capacitive to inductive. When the fermionic reservoirs are voltage biased, the dot can even cause photon emission due to inelastic tunneling to/from a BardeenCooper-Schrieffer peak in the density of states of the superconducting contact. We can model these numerous effects quantitatively in terms of the charge susceptibility of the quantum dot circuit. This validates an approach that could be used to study a wide class of mesoscopic QED devices.

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“…When C e−ph < 1/2 , it is possible to reach the lasing regime by coupling several double quantum dots to the cavity. This was recently realized with two double dots made in InAs nanowires 40,41 . Figure 18 shows the in-phase and quadrature phase components I and Q of the output field of the cavity, measured when only one of the dots fulfills ω DQD = ω 0 (panel (b)) or when the two dots satisfy ω DQD = ω 0 (panel (c)).…”

Section: Photon Emission Above the Lasing Thresholdmentioning

confidence: 99%

Cavity QED with hybrid nanocircuits: from atomic-like physics to condensed matter phenomena

Cottet¹,

Dartiailh²,

Desjardins³

et al. 2017

J. Phys.: Condens. Matter

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Circuit QED techniques have been instrumental to manipulate and probe with exquisite sensitivity the quantum state of superconducting quantum bits coupled to microwave cavities. Recently, it has become possible to fabricate new devices where the superconducting quantum bits are replaced by hybrid mesoscopic circuits combining nanoconductors and metallic reservoirs. This mesoscopic QED provides a new experimental playground to study the light-matter interaction in electronic circuits. Here, we present the experimental state of the art of Mesoscopic QED and its theoretical description. A first class of experiments focuses on the artificial atom limit, where some quasiparticles are trapped in nanocircuit bound states. In this limit, the Circuit QED techniques can be used to manipulate and probe electronic degrees of freedom such as confined charges, spins, or Andreev pairs. A second class of experiments consists in using cavity photons to reveal the dynamics of electron tunneling between a nanoconductor and fermionic reservoirs. For instance, the Kondo effect, the charge relaxation caused by grounded metallic contacts, and the photo-emission caused by voltage-biased reservoirs have been studied. The tunnel coupling between nanoconductors and fermionic reservoirs also enable one to obtain split Cooper pairs, or Majorana bound states. Cavity photons represent a qualitatively new tool to study these exotic condensed matter states.

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Injection locking of a semiconductor double-quantum-dot micromaser

Cited by 26 publications

References 55 publications

A coherent nanomechanical oscillator driven by single-electron tunnelling

A coherent nanomechanical oscillator driven by single-electron tunnelling

Cavity Photons as a Probe for Charge Relaxation Resistance and Photon Emission in a Quantum Dot Coupled to Normal and Superconducting Continua

Cavity QED with hybrid nanocircuits: from atomic-like physics to condensed matter phenomena

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