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23 April 2024 |
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Article overview
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Theory of double Cooper-pair tunneling and light emission mediated by a resonator | | W. T. Morley
; A. Di Marco
; M. Mantovani
; P. Stadler
; W. Belzig
; G. Rastelli
; A. D. Armour
; | | Date: |
15 May 2019 | | Abstract: | 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. | | Source: | arXiv, 1905.6194 | | Services: | Forum | Review | PDF | Favorites | |
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