Toy Model of Spinning Quantum Cosmology

In this paper, we show one theoretical possibility for cosmic rotation. We would like to appeal that: 1) Spin is a basic property of quantum mechanics and a globally rotating universe is consistent with general relativity and quantum gravity. 2) As physical understanding and physical evidence of dark energy is very poor, it is better to search for alternative concepts. 3) With reference to the well established 70% dark energy, it is possible to have a ‘concrete’ theory of cosmic rotation. In this toy model: at070km/sec/MpcHand 02.722TK, 1) Estimated current ordinary matter density is 0.043412038HGand corresponding cosmic radius and maximum expansion velocity are: 29 Gpc and6.8crespectively. 2) Current cosmic rotational kinetic energy densityis 0.6672 2038H cG. We would like to emphasize that dark energy can be identified with cosmic rotational kinetic energy.Our toy model is coherent in connecting most of the cosmic physical parameters and one very interesting point to be noted is that, it is one ‘inflation free’ model. With further study, a unified model of quantum cosmology can be developed with and without inflation.