Quantum state diffusion, measurement and second quantization

Details Quantum state diffusion, measurement and second quantization Quantum state diffusion, measurement and second quantization

1999-06-25

arxiv.org/abs/quant-ph/9906097v1

Phys.Lett. A261 (1999) 134-138

Physics

Quantum Physics

10 pages

Scientific paper

10.1016/S0375-9601(99)00526-5

Realistic dynamical theories of measurement based on the diffusion of quantum states are nonunitary, whereas quantum field theory and its generalizations are unitary. This problem in the quantum field theory of quantum state diffusion (QSD) appears already in the Lagrangian formulation of QSD as a classical equation of motion, where Liouville's theorem does not apply to the usual field theory formulation. This problem is resolved here by doubling the number of freedoms used to represent a quantum field. The space of quantum fields is then a classical configuration space, for which volume need not be conserved, instead of the usual phase space, to which Liouville's theorem applies. The creation operator for the quantized field satisfies the QSD equations, but the annihilation operator does not satisfy the conjugate eqation. It appears only in a formal role.

Affiliated with

Also associated with

No associations

Rating

Quantum state diffusion, measurement and second quantization does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Quantum state diffusion, measurement and second quantization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum state diffusion, measurement and second quantization will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-508255