Quantum inequalities are local constraints on the magnitude and extent of distributions of negative energy density in space-time. Initially conceived to clear up a long-standing problem in quantum field theory (namely, the potential for unconstrained negative energy density at a point), quantum inequalities have proven to have a diverse range of applications.
The form of the quantum inequalities is reminiscent of the uncertainty principle.
Read more about Quantum Inequalities: Energy Conditions in Classical Field Theory, Energy Conditions in Quantum Field Theory, Applications, People
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