Akihiro Nishiyama

In this talk we investigate waveguide Quantum Electrodynamics (wQED) for the description of tryptophan residues in microtubules representing data qubits for information storage and possibly information processing. We propose a Hamiltonian in wQED and derive Heisenberg equations for qubits and photons. Using the Heisenberg equations, we derive time-evolution equations for the probability of qubits and distribution of photons both at finite temperature. We then demonstrate the resultant sub-radiance with small decay rates, which is required to achieve robust data qubits for information storage by coupling tryptophan residues as containing data qubits with water molecules as Josephson quantum filters (JQFs). We describe an oscillation processes of qubits in a tubulin dimer through propagation of excitations with changing decay rates of JQFs. Data qubits are found to retain initial values by adopting sub-radiant states involving entanglement with water degrees of freedom. We also describe how information transfer in data qubits occurs via optical signals due to parametric resonance effects.