1 citations · 1 across the 1 of their papers we have counts for
6 papers
Fidelity of Gaussian channels
Carlton M. Caves, Krzysztof Wodkiewicz
A noisy Gaussian channel is defined as a channel in which an input field mode is subjected to random Gaussian displacements in phase space. We introduce the quantum fidelity of a G…
Comment on "Proposal for the Measurement of Bell-Type Correlations from Continuous Variables"
K. Banaszek, I. A. Walmsley, K. Wodkiewicz
In a recent paper [T. C. Ralph, W. J. Munro, R. E. S. Polkinghorne, Phys. Rev. Lett. 85, 2035 (2000)], the authors propose a test for Bell's inequalities based on quadrature measur…
Determination of the Wigner function from photon statistics
K. Banaszek, C. Radzewicz, K. Wodkiewicz +1
We present an experimental realisation of the direct scheme for measuring the Wigner function of a single quantized light mode. In this method, the Wigner function is determined as…
Nonlocality of the Einstein-Podolsky-Rosen state in the phase space
Konrad Banaszek, Krzysztof Wodkiewicz
We discuss violation of Bell inequalities by the regularized Einstein-Podolsky-Rosen (EPR) state, which can be produced in a quantum optical parametric down-conversion process. We…
Photon counting sampling of phase space
Konrad Banaszek, Krzysztof Wodkiewicz
The recently proposed scheme for direct sampling of the quantum phase space by photon counting is discussed within the Wigner function formalism.
Operational Theory of the Eight-Port Homodyne Detection
Piotr Kochanski, Krzysztof Wodkiewicz
The eight-port homodyne detection apparatus is analyzed in the framework of the operational theory of quantum measurement. For an arbitrary quantum noise leaking through the unused…