The task of creating a quantum theory of gravity is compared with Einstein's creation of a
relativistic theory of gravity. The philosophical and physical foundations of this theory are …

Conceptual and geometrical problems in quantum gravity Page 1 Conceptual and
Geometrical Problems in Quant um Gravity GJ Isham Blackett Laboratory Imperial College …

Classical gravitation, electromagnetism, charge, and mass are described in a preceding
article in terms of curved empty space and nothing more. In advance of the detailed …

Quantum Spacetime without Observers: Ontological Clarity and the Conceptual Foundations of
Quantum Gravity Page 1 Chapter 11 Quantum Spacetime without Observers: Ontological …

Any acceptable quantum gravity theory must allow us to recover the classical spacetime in
the appropriate limit. Moreover, the spacetime geometrical notions should be intrinsically …

The really novel feature of general relativity (henceforth abbreviated GR), as compared to
other field theories in physics, is that spacetime is not a fixed background arena that merely …

Quantum geometrodynamics is canonical quantum gravity with the three-metric as the
configuration variable. Its central equation is the Wheeler–DeWitt equation. Here I give an …

It is the opinion of a at least a sector of the fundamental theoretical physics community that
such field is going through a period of profound confusion (see, eg,[26, 15, 28, 29]). The …

Recent developments in quantum theory have focused attention on fundamental questions,
in particular on whether it might be necessary to modify quantum mechanics to reconcile …

I stress that spacetime is a redundant abstraction, since describing the physical content of all
so-called" spacetime measurements" only requires timing (by a physical/material clock) of …