Publikation: Theory of double Cooper-pair tunneling and light emission mediated by a resonator
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2019
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Morley, William T.
Armour, Andrew D.
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Physical Review B. 2019, 100(5), 054515. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.100.054515
Zusammenfassung
Photon emission by tunneling electrons can be encouraged by locating a resonator close to the tunnel junction and applying an appropriate voltage-bias. However, studies of normal metals show that the resonator also affects how the charges flow, facilitating processes in which correlated tunneling of two charges produces one photon. We develop a theory to analyze this kind of behavior in Josephson junctions by deriving an effective Hamiltonian describing processes where two Cooper-pairs generate a single photon. We determine the conditions under which the transport is dominated by incoherent tunneling of two Cooper-pairs, whilst also uncovering a regime of coherent double Cooper-pair tunneling. We show that the system can also display an unusual form of photon-blockade and hence could serve as a single-photon source.
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MORLEY, William T., Angelo DI MARCO, Mattia MANTOVANI, Pascal STADLER, Wolfgang BELZIG, Gianluca RASTELLI, Andrew D. ARMOUR, 2019. Theory of double Cooper-pair tunneling and light emission mediated by a resonator. In: Physical Review B. 2019, 100(5), 054515. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.100.054515BibTex
@article{Morley2019-05-15T13:58:07ZTheor-45829.2,
year={2019},
doi={10.1103/PhysRevB.100.054515},
title={Theory of double Cooper-pair tunneling and light emission mediated by a resonator},
number={5},
volume={100},
issn={2469-9950},
journal={Physical Review B},
author={Morley, William T. and Di Marco, Angelo and Mantovani, Mattia and Stadler, Pascal and Belzig, Wolfgang and Rastelli, Gianluca and Armour, Andrew D.},
note={Article Number: 054515}
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<dcterms:abstract xml:lang="eng">Photon emission by tunneling electrons can be encouraged by locating a resonator close to the tunnel junction and applying an appropriate voltage-bias. However, studies of normal metals show that the resonator also affects how the charges flow, facilitating processes in which correlated tunneling of two charges produces one photon. We develop a theory to analyze this kind of behavior in Josephson junctions by deriving an effective Hamiltonian describing processes where two Cooper-pairs generate a single photon. We determine the conditions under which the transport is dominated by incoherent tunneling of two Cooper-pairs, whilst also uncovering a regime of coherent double Cooper-pair tunneling. We show that the system can also display an unusual form of photon-blockade and hence could serve as a single-photon source.</dcterms:abstract>
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