pilot wave theory to spin- fields and to gravitation. Background and implications Valentini has been described as an "ardent admirer of de Broglie". He noted that "de Broglie (rather like Maxwell) emphasized an underlying 'mechanical' picture: particles were assumed to be singularities of physical waves in space". He emphasized that de Broglie, with the assistance of Erwin Schrödinger, had constructed pilot wave theory, but later abandoned it in favor of quantum formalism. Valentini's derivation of the quantum equilibrium hypothesis was criticized by Detlef Dürr and co-workers in 1992, and the derivation of the quantum equilibrium hypothesis has remained a topic of active investigation. "Signal nonlocality", which is forbidden in orthodox quantum theory, would allow nonlocal quantum entanglement to be used as a stand-alone communication channel without the need of a classical light-speed limited retarded signal to unlock the entangled message from the sender to the receiver. This would be a major revolution in physics and would possibly make the cosmic landscape string theory Popper falsifiable. Publications Book Guido Bacciagaluppi, Antony Valentini: Quantum theory at the crossroads: Reconsidering the 1927 Solvay Conference, Cambridge Univ. Press, 2009, Articles Antony Valentini, Hans Westman: Dynamical origin of quantum probabilities, Proceedings of the Royal Society A 8, vol. 461, no. 2053 p. 253-272, January 2005, Antony Valentini: Subquantum information and computation, 2002, Pramana Journal of Physics, vol. 59, no. 2, August 2002, p. 269–277 Antony Valentini: Signal-locality in hidden-variables theories, Physics Letters A, vol. 297, no. 5-6, 20 May 2002, p. 273-278 online from arxiv.org Antony Valentini: Hidden Variables, Statistical Mechanics and the Early Universe, Chance in Physics, Lecture Notes in Physics, Springer 2001, Volume 574/2001, 165–181, Antony Valentini: On Galilean and Lorentz invariance in pilot-wave dynamics, Physics Letters A, 228, 215–222, 1997 online from arxiv.org Antony Valentini: Pilot-wave theory of fields, gravitation and cosmology, in: James T. Cushing, Arthur Fine, Sheldon Goldstein (eds.): Bohmian mechanics and quantum theory: an appraisal, Kluwer Academic Publishers, 1996, p. 45–66 (a brief outline by Valentini of his work of 1991–1996 on the de Broglie–Bohm theory) Antony Valentini: On the Pilot-Wave Theory of Classical, Quantum and Subquantum Physics, Ph.D. Thesis, ISAS, Trieste 1992 Antony Valentini: Signal-locality, uncertainty, and the sub-quantum H-theorem, II, Physics Letters A, vol. 158, no. 1, 1991, p. 1–8 Antony Valentini: Signal-locality, uncertainty, and the sub-quantum H-theorem, I, Physics Letters A, vol. 156, no. 5, 1991 Antony Valentini: Resolution of causality violation in the classical radiation