Dual-path measurements of propagating microwave signals at the quantum level for circuit QED
ORAL
Abstract
Few-photon propagating microwave signals can be characterized by means of a beam splitter and two amplification chains. We show that such a setup is robust against random noise added by the amplifiers. Even if this noise is much larger than the signal itself, the first two signal moments and, hence, Gaussian states can be analyzed via correlation measurements. We discuss possible applications of the dual-path method for detecting a squeezed state generated by a superconducting Josephson parametric amplifier and in circuit QED setups.
*We acknowledge support from SFB631, NIM, UPV/EHU Grant GIU07/40 and European project EuroSQIP.
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Authors
E.P. Menzel
Walther-Meissner-Institut and TU Muenchen, Garching, Germany
M. Mariantoni
Walther-Meissner-Institut and TU Muenchen, Garching, Germany
F. Deppe
Walther-Meissner-Institut and TU Muenchen, Garching, Germany
M.A. Araque Caballero
Walther-Meissner-Institut and TU Muenchen, Garching, Germany
A. Baust
Walther-Meissner-Institut and TU Muenchen, Garching, Germany
E. Hoffmann
Walther-Meissner-Institut and TU Muenchen, Garching, Germany
T. Niemczyk
Walther-Meissner-Institut and TU Muenchen, Garching, Germany
A. Marx
Walther-Meissner-Institut and TU Muenchen, Garching, Germany
R. Gross
Walther-Meissner-Institut and TU Muenchen, Garching, Germany
E. Solano
Universidad del Pais Vasco and Ikerbasque Foundation, Bilbao, Spain
