A post-quantum theory of classical gravity?
We present a consistent theory of classical gravity coupled to quantum field theory. The dynamics is linear in the density matrix, completely positive and trace-preserving, and reduces to Einstein's equations in the classical limit. The constraints of general relativity are imposed as a symmetry on the equations of motion. The assumption that gravity is classical necessarily modifies the dynamical laws of quantum mechanics -- the theory must be fundamentally stochastic involving finite sized and probabilistic jumps in space-time and in the quantum field. Nonetheless the quantum state of the system can remain pure conditioned on the classical degrees of freedom. The measurement postulate of quantum mechanics is not needed since the interaction of the quantum degrees of freedom with classical space-time necessarily causes collapse of the wave-function. More generally, we derive a form of classical-quantum dynamics using a non-commuting divergence which has as its limit deterministic classical Hamiltonian evolution, and which doesn't suffer from the pathologies of the semi-classical theory.
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Jonathan Oppenheim (edit)
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11/08/18 06:05PM
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hep_th: [1811.03116] Jonathan Oppenheim : A post-quantum theory of classical gravity? https://t.co/NmvOeyQIF4
world_fantasia: RT @hottaqu: ジョナサンの論文のアーカイブコメントが利いている。 「暗闇の部屋で黒い猫を探すのは極めて難しい。特に、猫がいなければ。」 物理学者は、シュレディンガーの猫やチェシャ猫など、猫が大好きなのだ。 https://t.co/2xBNr1I7V5
hottaqu: ジョナサンの論文のアーカイブコメントが利いている。 「暗闇の部屋で黒い猫を探すのは極めて難しい。特に、猫がいなければ。」 物理学者は、シュレディンガーの猫やチェシャ猫など、猫が大好きなのだ。 https://t.co/2xBNr1I7V5
MUKULBHALLA7: https://t.co/TEF0uNWtbZ
AstralDexter: "It's very difficult to find a black cat in a dark room, especially if there is no cat." 코멘트 보소 =_=;; https://t.co/MEHZneUrEu
QuantumPapers: A post-quantum theory of classical gravity?. https://t.co/vKyXvRRFie
QPhysical: Just read through an interesting new paper by Jonathan Oppenheim working toward a classical understanding of gravity in light of quantum mechanics. https://t.co/qUnPIpyPHO
OSablin: "A post-quantum theory of classical gravity?. (arXiv:1811.03116v1 [hep-th])" https://t.co/W8wAdClKMw
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