%A NIM. 15690044 SYAFI’I FAHMI BASTIAN
%O Joko Purwanto, M.Sc
%T QUANTUM STATE TOMOGRAPHY OF SINGLE QUBIT
WITH LASER IR 808nm USING DENSITY MATRIX
%X The quantum state tomography is an essential component in the development of
quantum technologies. It is a representation of polarization state which can be used
to know the characterization of small particle called photon in the nanoscale. In
this research, photon number has been measured in order to create the states
tomography. Optical devices and quantum-mechanical approaches were used to
accomplish the image of quantum state tomography. Due to a single qubit state
density matrix can be represented by Stokes parameters, so there are four set-ups
to measure the Stokes parameters for each sample. The density matrix in this work
is used because the pure state only happen in theoretical idea. And in the real
experiment, It always shows a mixed state. The density matrix will represent
seven samples in this work. The samples of tomography measurements consist of
horizontal state, vertical state, diagonal state, anti-diagonal state, right-circular
state, left-circular state and the tomography of laser IR 808nm. In this work, state
tomography is shown by 2x2 density matrix. This research also shows the
fidelities between theory and experiment result. And it shows the good agreement.
From this research, the state of laser beam has known. The laser that used is
showing a vertical state with fidelity F=97,34%.
%K quantum state tomography, density matrix, a single qubit
%D 2019
%I UNIVERSITAS ISLAM NEGERI SUNAN KALIJAGA YOGYAKARTA
%L digilib37239