Wigner Function from Keldysh Field Theory

ORAL

Abstract

The Wigner function is a crucial construction in the tomography of a quantum state/density matrix. Negativity of the Wigner function indicates the presence of non-classical correlations in a system. We show a new technique to calculate Wigner functions from Keldysh field theory, which allows us to compute Wigner functions of many body density matrices. We extend the Keldysh field theory to include arbitrary initial density matrices and construct the corresponding Wigner functions.

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Presenters

  • Rajdeep Sensarma

    Department of Theoretical Physics, Tata Institute of Fundamental Reseach, Department of Theoretical Physics, Tata Institute of Fundamental Research, Tata Institute of Fundamental Research

Authors

  • Rajdeep Sensarma

    Department of Theoretical Physics, Tata Institute of Fundamental Reseach, Department of Theoretical Physics, Tata Institute of Fundamental Research, Tata Institute of Fundamental Research

  • Ahana Chakraborty

    Department of Theoretical Physics, Tata Institute of Fundamental Reseach, Department of Theoretical Physics, Tata Institute of Fundamental Research