Antibunched Photons from Inelastic Cooper-Pair Tunneling

Juha Leppäkangas, Mikael Fogelström, Alexander Grimm, Max Hofheinz, Michael Marthaler, Göran Johansson

Research output: Contribution to journalArticlepeer-review


We demonstrate theoretically that charge transport across a Josephson junction, voltage-biased through a resistive environment, produces antibunched photons. We develop a continuous-mode description of the emitted radiation field in a semi-infinite transmission line terminated by the Josephson junction. Within a perturbative treatment in powers of the tunneling coupling across the Josephson junction, we capture effects originating in charging dynamics of consecutively tunneling Cooper pairs. We find that within a feasible experimental setup the Coulomb blockade provided by high zero-frequency impedance can be used to create antibunched photons at a very high rate and in a very versatile frequency window ranging from a few GHz to a THz.

Original languageEnglish
Article number027004
JournalPhysical Review Letters
Issue number2
StatePublished - 8 Jul 2015
Externally publishedYes


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