1. C. Caves, Physical Review D 23 1693 (1981).
2. C. Misner, J, Wheeler, K. Thorne, Gravitation ch, 35, W.H. Freeman (1973).
3. Ibid ch, 25
4. Ed. C. Edwards, Gravitational Radiation Collapsed Objects and Exact Solutions, Springer Verlag (1980). See chapter by W. Unruh.
5. An analysis of a “generalized squeezed state” (called a “multimode squeezed state” by Caves) is given in an appendix to C. M. Caves “Quantum Limits on Noise in Linear Amplifiers” preprint, California Institute of Technology, Pasadena, California.