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Could there be a quantum superposition of consciousness, as in the Wigner'sfriend thought experiment? The integrated information theory (IIT) ofconsciousness has turned this into a well-defined question. According to IIT,consciousness is a measurable physical quantity given by integrated information($\Phi$), such that the amount of consciousness in a system corresponds to itsamount of $\Phi$. We use the most recent IIT formalism (IIT4.0) to analyze thesimplest non-zero $\Phi$ system known as a feedback dyad. We then propose acircuit that puts the dyad into a superposition of states which, according toIIT, would correspond to a superposition of conscious states. We refer to thisas "Schr\"odinger's dyad". We therefore show that either IIT is false or thesimple dyad is conscious and can easily be put into a superposition ofconscious states. We then identify the simplest possible consciousness-collapsemodel, which predicts that this superposition is unstable and collapses at arate determined by a measure of difference between the superposed consciousstates. Our analysis will enable us to make a number of key observations aboutthe general structure of integrated information theory (IIT2.0, IIT3.0, IIT4.0,and QIIT) and the general structure of consciousness-collapse models.

Building a quantum superposition of conscious states with integrated information theory