Experimental quantum tomography of photonic qudits via mutually unbiased basis

TL;DR

This paper demonstrates experimental quantum tomography of 7- and 8-dimensional photonic qudits using mutually unbiased bases, optimizing measurement efficiency with programmable spatial light modulators.

Contribution

It introduces an experimental method for quantum tomography of high-dimensional photonic systems using MUBs and programmable spatial light modulators.

Findings

Successful implementation of quantum tomography for 7- and 8-dimensional systems

Efficient measurement scheme requiring minimal bases

Use of programmable spatial light modulators for encoding

Abstract

We present the experimental quantum tomography of 7- and 8-dimensional quantum systems based on projective measurements in the mutually unbiased basis (MUB-QT). One of the advantages of MUB-QT is that it requires projections from a minimal number of bases to be performed. In our scheme, the higher dimensional quantum systems are encoded using the propagation modes of single photons, and we take advantage of the capabilities of amplitude- and phase-modulation of programmable spatial light modulators to implement the MUB-QT.