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Non-adiabatic transition probability with a moving $δ$ potential coupling

The present work focuses on the calculation of a non-adiabatic transition probability between two states which may or may not cross with each other and are coupled to each other by a moving $δ$ function potential. Here, the time dependent Schrodinger equation is converted to time independent one by using a scaling factor which is function of time. This time independent Schrodinger equation is then considered for two potentials coupled by a moving $δ$ potential and an expression for non-adiabatic transition probability has been derived.