Title: Does consciousness really collapse the wave function?: A possible objective biophysical resolution of the measurement problem - ScienceDirect
Headings: Does consciousness really collapse the wave function?
: A possible objective biophysical resolution of the measurement problem

Biosystems
Does consciousness really collapse the wave function?: A possible objective biophysical resolution of the measurement problem
Abstract
Keywords
1. Introduction
2. The eye as a macroscopic apparatus and its possible role in resolving the measurement problem
3. Can Euglena collapse the wave function?
4. Proposed Ghirardi superposed photon-retinal tissue experiment
5. The “many worlds” interpretation of the measurement problem: can biophysics tell us something about quantum cosmology?
6. Discussion
7. Conclusion
Acknowledgements
References

Content: And, he further feels that the equations of motion of quantum mechanics cease to be linear, in fact they are grossly nonlinear if conscious beings enter the picture. Shimony (1963) feels that the conceptual problems of quantum mechanics will be resolved by discovering corrections to the physical theory itself, for example, by finding that the time-dependent Schrödinger equation is only an approximation to an exact nonlinear equation governing the evolution of the state of a system. If this proves to be true, then he advances the theory that the reduction of a superposition could perhaps occur when the microscopic system interacts with the macroscopic apparatus, and no appeal to the consciousness of an observer for this purpose would be required. In his later years Wigner changed his position to an exactly opposite viewpoint, in order to avoid solipsism and the role that consciousness plays, closely mirroring that postulated by Shimony ( Mehra, 1995, p. 593). Wigner considered it to be necessary to admit state reductions independently of an observer's consciousness, and makes a concrete suggestion for an amendment of the Schrödinger equation which is intended to describe a physical process of state reduction ( Mehra, 1995, pp. 73, 230). A state reduction is now felt by Wigner to occur as an objective event in the physical realm before the von Neumann chain reaches the consciousness of an observer ( Mehra, 1995, pp. 75–77, 242–243; Esfeld, 1999 ). It is of historic interest to note here that Dirac (1930), who invented the idea of wave function collapse, said that it is nature that makes the choice of measuremental result;