Physics – Quantum Physics
Scientific paper
2010-04-22
Phys. Rev. A 82, 043804 (2010)
Physics
Quantum Physics
v1: 11 pages, 7 figures , v2: Minor revisions throughout for clarity. Added a few references and an appendix
Scientific paper
10.1103/PhysRevA.82.043804
Correlations are important tools in the characterization of quantum fields. They can be used to describe statistical properties of the fields, such as bunching and anti-bunching, as well as to perform field state tomography. Here we analyse experiments by Bozyigit et al. [arXiv:1002.3738] where correlation functions can be observed using the measurement records of linear detectors (i.e. quadrature measurements), instead of relying on intensity or number detectors. We also describe how large amplitude noise introduced by these detectors can be quantified and subtracted from the data. This enables, in particular, the observation of first- and second-order coherence functions of microwave photon fields generated using circuit quantum-electrodynamics and propagating in superconducting transmission lines under the condition that noise is sufficiently low.
Blais Alexandre
Bozyigit Deniz
da Silva Marcus P.
Wallraff Andreas
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