934 citations · 3.5k across the 98 of their papers we have counts for
4 papers · 1 filter
Conservation Laws in the Quantum Mechanics of Closed Systems
James B. Hartle, Raymond Laflamme, Donald Marolf
We investigate conservation laws in the quantum mechanics of closed systems. We review an argument showing that exact decoherence implies the exact conservation of quantities that…
Spacetime Information
James B. Hartle
In usual quantum theory, the information available about a quantum system is defined in terms of the density matrix describing it on a spacelike surface. This definition must be ge…
Quasiclassical Realms in a Quantum Universe
James B. Hartle
In this universe, governed fundamentally by quantum mechanical laws, characterized by indeterminism and distributed probabilities, classical deterministic laws are applicable over…
Equivalent Sets of Histories and Multiple Quasiclassical Realms
Murray Gell-Mann, James B. Hartle
We consider notions of physical equivalence of sets of histories in the quantum mechanics of a closed system. We show first how the same set of histories can be relabeled in variou…