How does Rajendra Deshpande try to rationalize the experience of Professor Gaitonde about his transition to another world and back?

According to Rajendra, Professor Gaitonde had passed through a fantastic experience or more correcting, a catastrophic experience. He tried to rationalize it on the basis of two scientific theories that were current then. One was the catastrophe theory. The result of the battle would have been determined by the acts of the leaders and the morale of troops at the critical juncture. The blow of losing the leaders would have led to loss of morale and fighting spirit. An utter rout would have followed. If the crucial event had gone the other way, its effect on the troops would also have been the opposite. Their morale would have been boosted and they might have won. The course of history would have been different.

The other explanation, is through the lack of determinism in quantum theory. Catastrophe situations after radically different alternatives for the world to proceed. All alternatives are viable so far as reality is concerned. However, the observer can experience only one of them at a time. Professor Gaitonde made a transition from one world to the other as he had been thinking about the catastrophe theory and Battle of Panipat. The neurons in his brain acted as trigger.