Regimes of radiative and nonradiative transitions in transport through an electronic system in a photon cavity reaching a steady state

Guðmundsson, Viðar; Jonsson, Thorsteinn; Bernodusson, Maria; Abdullah, Nzar Rauf; Sitek, Anna; Goan, Hsi‐Sheng; Tang, Chi-Shung; Manolescu, Andrei

doi:10.1002/andp.201600177

Cited by 16 publications

(26 citation statements)

References 27 publications

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“…Second, the behavior of quantum dot circuits coupled to optical cavities is discussed theoretically in Refs. [213][214][215][216][217][218][219][220][221] . The fabrication of such devices is extremely challenging, but this could reveal effects related to the polarization of light.…”

Section: Discussionmentioning

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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Section: Discussionmentioning

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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“…We notice that it takes the system a longer time to reach the steady state, than for the case of transport through the one‐electron ground state . Furthermore, the transition to the steady state is marked by radiative processes, though to a lesser extent for the narrow bias window . For the narrow bias window,

Δ μ = 0.3

meV, the photon mean value,

N_{γ}

, is vanishingly small in the steady state, but for the broader bias window,

Δ μ = 2.3

meV, a photon accumulation is seen for the slower cavity decay constant,

κ = 1 \times 10^{- 6}

meV.…”

Section: Transportmentioning

confidence: 82%

Electroluminescence Caused by the Transport of Interacting Electrons through Parallel Quantum Dots in a Photon Cavity

et al. 2017

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We show that a Rabi-splitting of the states of strongly interacting electrons in parallel quantum dots embedded in a short quantum wire placed in a photon cavity can be produced by either the para-or the dia-magnetic electron-photon interactions when the geometry of the system is properly accounted for and the photon field is tuned close to a resonance with the electron system. We use these two resonances to explore the electroluminescence caused by the transport of electrons through the one-and two-electron ground states of the system and their corresponding conventional and vacuum electroluminescense as the central system is opened up by coupling it to external leads acting as electron reservoirs. Our analysis indicates that high-order electron-photon processes are necessary to adequately construct the cavity-photon dressed electron states needed to describe both types of electroluminescence.

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“…The heat current was thus enhanced for both photon energies, 0.74 (green squares) and 1.98 meV (red triangles). In the same range, µ < 1.25 meV, the thermoelectric current was slightly suppressed, which was due to the radiative transition of G 1γ in the electron transport [34].…”

Section: The Quantum Wire With Photon Fieldmentioning

confidence: 89%

“…that describe the electron-photon interactions where ρ and J are the charge and the charge-current densities, respectively [34,35].…”

Section: Modelmentioning

confidence: 99%

Photon-Mediated Thermoelectric and Heat Currents through a Resonant Quantum Wire-Cavity System

2019

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We theoretically consider a short quantum wire, which on both ends is connected to leads that have different temperatures. The quantum wire is assumed to be coupled to a cavity with a single-photon mode. We calculate the heat and thermoelectric currents in the quantum wire under the effect of the photon field. In the absence of the photon field, a plateau in the thermoelectric current is observed due to the thermal smearing at a high temperature gradient. In the presence of the resonance photon field, when the energy spacing between the lowest states of the quantum wire is approximately equal to the photon energy, a suppression in thermoelectric current and negativity in the heat current are seen due to the dressed electron-photon states. It is also found that the cavity with high photon energy has more influence on the thermoelectric current at a high temperature gradient.

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Regimes of radiative and nonradiative transitions in transport through an electronic system in a photon cavity reaching a steady state

Cited by 16 publications

References 27 publications

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

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

Electroluminescence Caused by the Transport of Interacting Electrons through Parallel Quantum Dots in a Photon Cavity

Photon-Mediated Thermoelectric and Heat Currents through a Resonant Quantum Wire-Cavity System

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