The quantum vacuum state or simply quantum vacuum is the state with the lowest possible energy in a quantum field theory.
Quantum vacuum may also refer to:
Ground state, the state of lowest energy of a quantum system Quantum chromodynamic vacuum (QCD vacuum), the vacuum in the theory of QCD Quantum electrodynamic vacuum (QED vacuum), the vacuum in the theory of QED The Quantum Vacuum, a physics textbook by Peter W. Milonni
See also Quantum vacuum collapse, a hypothetical vacuum metastability event Vacuum expectation value, an operator's average value in a quantum vacuum Vacuum energy, an underlying background energy in a quantum vacuum Quantum fluctuation Quantum foam Quantum vacuum thruster Virtual particle Zero-point energy