Table 1 Coherence time of sunlight: experimental vs. theory. The error for the experimental values are calculated as the standard uncertainty of the mean from 30 and 24 measurements collected between August 2019—September 2020 in Edinburgh, Scotland for the instrument-filtered and chlorophyll-filtered cases, respectively. \(\Delta \tau _{Wolf}\) and \(\Delta \tau _{Mandel}\) are calculated using Eqs. (2a) and (2b), respectively. For the theoretical calculations, a black-body temperature of 5777  K was used. All values have been rounded to two decimal places.

From: The coherence time of sunlight in the context of natural and artificial light-harvesting

 

Instrument-filtered

Chlorophyll-filtered

\(\Delta \tau _{Wolf}\) (fs)

\(\Delta \tau _{Mandel}\) (fs)

\(\Delta \tau _{Wolf}\) (fs)

\(\Delta \tau _{Mandel}\) (fs)

Experimental \(\left( |\gamma (t)|\right)\)

\(1.12\pm 0.04\)

\(1.08\pm 0.04\)

\(4.87\pm 0.21\)

\(0.92\pm 0.03\)

Experimental \(\left( \text {Re}\{\gamma (t)\}\right)\)

\(1.13\pm 0.03\)

\(0.61\pm 0.02\)

\(4.49\pm 0.15\)

\(0.61\pm 0.02\)

Theory (Sigmoid Model)

1.13

1.89

5.00

3.27