Скачать или смотреть Qoffee with Ludmila - Quantum State Tomography (QST)

Topic: Quantum State Tomography and Continuous Variable Quantum States

Speaker: Ludmila S. Botelho, PhD student at the Institute of Theoretical and Applied Informatics, Polish Academy of Sciences.


Abstract:
Given an unknown quantum state, what are the necessary ingredients to characterize it? And why do we even care?
The task of estimating density matrices based on measurement results, or simply Quantum State Tomography (QST), is essential for characterizing optical signals as well as in quantum computing and quantum information theory to reliably determine the actual states of the qubits. Alternatively, in the case of continuous variable quantum states, one could be interested in reconstructing the states Wigner function instead density matrix. However it is well known that the number of measurements to fully characterize a state grows polynomially with dimension of the state.
So, in this talk we give an introduction to QST, which is follows up with a discuss about a simple method to reconstruct the Wigner function of many-mode continuous variable systems.

Session Date: August 14th, 2021