“…The cyclic path in information geometry and optimal transport theory was discussed in the optimal heat engine [27,31,32,93,94] and the geometric pump [95]. A geometric interpretation of the restricted path may also be interesting in the context of optimal limited control [96][97][98][99]. The dual coordinate systems in stochastic thermodynamics provide the duality in stochastic thermodynamics [41,42,44,82,83,100,101], which is related to the variational calculus such as the maximum caliber principle [44,[101][102][103] and the Schrödinger bridge [104,105].…”