Vol. 49 (2018) ACTA PHYSICA POLONICA B No 9 LIMITS ON QUANTUM COHERENT DOMAINS IN LIQUID WATER Martin Bier Dept. of Physics, East Carolina University, Greenville, NC 27858, USA and Faculty of Mechanical Engineering and Institute of Mathematics and Physics University of Technology and Life Sciences, 85-796 Bydgoszcz, Poland David Pravica Dept. of Mathematics, East Carolina University, Greenville, NC 27858, USA (Received June 13, 2018; accepted July 18, 2018) A Quantum Field Theoretic analysis has led to the claim that liquid water supports coherent domains of almost millimeter size [E. Del Giudice, G. Preparata, G. Vitiello, Phys. Rev. Lett. 61, 1085 (1988)]. Such domains would be described by one quantum mechanical state function. Further analysis results in new characteristic frequencies and in the claim that a long-range (> 100 µm) structure emerges around a molecular size dipole. The quantum-physics-based claim that liquid water supports structures of over 100 micrometer in size at room temperature is irreconcilable with a well-known consensus of condensed matter physics: Brownian collisions make wave functions collapse and hot, wet environments do not allow for quantum entanglements to survive. Simulations, theory, and experiment agree on how a hydration shell of a few layers of directed water dipoles forms around an ion or a polar molecule. Such a shell extends to less than a nanometer. We reexamine the assumptions and theory behind the coherent domain dynamics in water. It appears likely that large, long- lasting coherent domains do not emerge in liquid water. DOI:10.5506/APhysPolB.49.1717 1. Introduction In 1988, a Letter was published with the remarkable title “Water as a Free Electric Dipole Laser” [1]. The guiding idea of the Letter is that a rotating water molecule implies a rotating dipole. Such a rotating dipole emits radiation. With that radiation, stimulated-emission dynamics can oc- cur. The formalism developed for water was similar to one developed earlier for a free electron laser [2]. Thus, the Free Electron Dipole Laser (FEDL). (1717)