Feasibility study towards comparison of the g(2)(0) measurement in the visible range

Feasibility study towards comparison of the <em>g</em>⁽²⁾(0) measurement in the visible range This work reports on the pilot study, performed by INRIM, NPL and PTB, on the measurement of the <em>g</em>⁽²⁾(0) parameter in the visible spectral range of a test single-photon source based on a colour centre in diamond. The development of single-photon sources is of high interest to the metrology community as well as the burgeoning quantum technologies industry. Measurement of the <em>g</em>⁽²⁾(0) parameter plays a vital role in characterising and understanding single-photon emission. This comparison has been conducted by each partner individually using their own equipment at INRIM laboratories, which were responsible for the operation of the source.