It is known that from the vacuum of a quantum field theory, virtual particle pairs are created and destroyed; is it possible to capture these particles thus obtaining free energy from the vacuum?
Answer
The energy is borrowed from the Heisenberg Uncertainty Principle to create virtual particles and has to be paid back in a very short time.
$\Delta{t} \geq \frac{\hbar}{2\Delta{E}}$
This is why virtual particles live for very short times (i.e pop in and out of existence). We cannot manipulate this energy.
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