79 citations · 310 across the 37 of their papers we have counts for
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gr-qc1996★ 1 cited
On Quantum Inequalities
Adam D. Helfer
Building on the "quantum inequalities" introduced by Ford, I argue that the negative local energies encountered in quantum field theory can only be observed by detectors with posit…
gr-qc1996★ 30 cited
The Stress-Energy Operator
Adam D. Helfer
We compute the stress--energy operator for a scalar linear quantum field in curved space-time, modulo c-numbers. For the associated Hamiltonian operators, even those generating evo…