Before revision:  In our scheme, we assume that the invested capital is explicitly associated with the  free-energy ( ergotropy ) of a single mode of the electromagnetic radiation which, depending on the outcome of the betting, experiences attenuation or amplification processes which model losses and winning events.
After revision:  In our scheme, we assume that the invested capital is explicitly associated with the free-energy ( i.e. ergotropy functional by Allahverdyan, Balian, and Nieuwenhuizen ) of a single mode of the electromagnetic radiation which, depending on the outcome of the betting, experiences attenuation or amplification processes which model losses and winning events.