Dynamics of momentum entanglement in lowest-order QED

Details Dynamics of momentum entanglement in lowest-order QED Dynamics of momentum entanglement in lowest-order QED

2005-09-02

arxiv.org/abs/quant-ph/0509021v2

Phys. Rev. A 73, 012335 (2006)

Physics

Quantum Physics

10 pages and 7 figures. Accepted in PRA

Scientific paper

10.1103/PhysRevA.73.012335

We study the dynamics of momentum entanglement generated in the lowest-order QED interaction between two massive spin-1/2 charged particles, which grows in time as the two fermions exchange virtual photons. We observe that the degree of generated entanglement between interacting particles with initial well-defined momentum can be infinite. We explain this divergence in the context of entanglement theory for continuous variables, and show how to circumvent this apparent paradox. Finally, we discuss two different possibilities of transforming momentum into spin entanglement, through dynamical operations or through Lorentz boosts.

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