Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session E28: Experiment and Theory of Quantum Input-output Networks
8:00 AM–11:00 AM,
Tuesday, March 6, 2018
LACC Room: 405
Sponsoring Unit: DQI
Chair: Kevin Young, Sandia Natl Labs
Abstract: E28.00010 : Multiphoton Scattering Tomography with Coherent States*
10:36 AM–10:48 AM
Juan Jose Garcia-Ripoll
We have proposed an experimental procedure to reconstruct the scattering matrix of an unknown quantum system interacting with propagating photons. Our method requires coherent state laser or microwave inputs and homodyne detection at the scatterer's output, and provides simultaneous information about multiple ---elastic and inelastic--- segments of the scattering matrix. The method is resilient to detector noise and its errors can be made arbitrarily small by combining experiments at various laser powers. Finally, we show that the tomography of scattering has to be performed using pulsed lasers to efficiently gather information about the nonlinear processes in the scatterer. The techniques in this work are general, allowing a full characterization of how a small quantum system interacts with the environment, and it is particularly well suited for working with superconducting circuits. This work has been published in Tomás Ramos, Juan José García-Ripoll, Phys. Rev. Lett. 119, 153601 (2017).
*The authors acknowledge support from the MINECO/FEDER Project FIS2015-70856-P and CAM PRICYT Research Network QUITEMAD+ S2013/ICE-2801.
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