Correlated Cooper pair transport and microwave photon emission in the dynamical Coulomb blockade
Artikel i vetenskaplig tidskrift, 2016

We study theoretically electromagnetic radiation emitted by inelastic Cooper-pair tunneling. We consider a dc-voltage-biased superconducting transmission line terminated by a Josephson junction. We show that the generated continuous-mode electromagnetic field can be expressed as a function of the time-dependent current across the Josephson junction. The leading-order expansion in the tunneling coupling, similar to the P(E) theory, has previously been used to investigate the photon emission statistics in the limit of sequential (independent) Cooper-pair tunneling. By explicitly evaluating the system characteristics up to the fourth order in the tunneling coupling, we account for dynamics between consecutively tunneling Cooper pairs. Within this approach we investigate how temporal correlations in the charge transport can be seen in the first- and second-order coherences of the emitted microwave radiation.

Författare

Juha Leppäkangas

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Mikael Fogelström

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

M. Marthaler

Göran Johansson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Physical Review B: covering condensed matter and materials physics

2469-9969 (eISSN)

Vol. 93 014506-

Quantum Propagating Microwaves in Strongly Coupled Environments (PROMISCE)

Europeiska kommissionen (FP7), 2012-04-01 -- 2015-03-31.

Styrkeområden

Nanovetenskap och nanoteknik

Fundament

Grundläggande vetenskaper

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1103/PhysRevB.93.014506