•  152
    Squaring the Circle: Gleb Wataghin and the Prehistory of Quantum Gravity
    Studies in the History and the Philosophy of Modern Physics 46 (2): 217-227. 2014.
    The early history of the attempts to unify quantum theory with the general theory of relativity is depicted through the work of the under--appreciated Italo-Brazilian physicist Gleb Wataghin, who is responsible for many of the ideas that the quantum gravity community is entertaining today.
  •  164
    The Primacy of Geometry
    with Meir Hemmo
    Studies in the History and Philosophy of Modern Physics 44 (3): 357-364. 2013.
    We argue that current constructive approaches to the special theory of relativity do not derive the geometrical Minkowski structure from the dynamics but rather assume it. We further argue that in current physics there can be no dynamical derivation of primitive geometrical notions such as length. By this we believe we continue an argument initiated by Einstein.
  •  275
    Quantum hypercomputability?
    Minds and Machines 16 (1): 87-93. 2006.
    A recent proposal to solve the halting problem with the quantum adiabatic algorithm is criticized and found wanting. Contrary to other physical hypercomputers, where one believes that a physical process “computes” a (recursive-theoretic) non-computable function simply because one believes the physical theory that presumably governs or describes such process, believing the theory (i.e., quantum mechanics) in the case of the quantum adiabatic “hypercomputer” is tantamount to acknowledging that the…Read more