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Theory of double Cooper-pair tunneling and light emission mediated by a resonator by Morley, W. T.; Di Marco, A.; Mantovani, M.; Stadler, P.; Belzig, W.; Rastelli, G.; Armour, A. D. is a scholarly article available to read on EtoBox.

What is Theory of double Cooper-pair tunneling and light emission mediated by a resonator about?

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.

Author

Morley, W. T.; Di Marco, A.; Mantovani, M.; Stadler, P.; Belzig, W.; Rastelli, G.; Armour, A. D.

Published

2019

Language

EN