Before revision: A classical analogue of the quantum geometric phase may be realised in a given biological oscillator and require the cell to correct for an additional quantity added to the phase of oscillation upon every repetition of the cell cycle  .
After revision: A classical analogue of the quantum geometric phase may be realised in a given biological oscillator and require the cell to correct for an additional quantity added to the phase of oscillation upon every repetition of the cell cycle . The resulting phase shift is an analogue of the geometric phase, an abstract entity first discovered in quantum mechanics. In this letter I will discuss the theory of the geometric phase shift, and demonstrate its relevance to biological oscillations .