High Quality Content by WIKIPEDIA articles! In quantum field theory, a false vacuum is a metastable sector of space which appears to be a perturbative vacuum but is unstable to instanton effects which may tunnel to a lower energy state. This tunneling can be caused by quantum fluctuations or the creation of high-energy particles. Simply put, the false vacuum is a local minimum, but not the lowest energy state, even though it may remain stable for some time. This is analogous to metastability for first order phase transitions.

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