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Probability distribution of the vacuum energy density

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arxiv 1002.1846 v2 pith:YK5YZ4R7 submitted 2010-02-09 hep-th astro-ph.COgr-qchep-ph

Probability distribution of the vacuum energy density

classification hep-th astro-ph.COgr-qchep-ph
keywords densityvacuumenergyprobabilitydistributionhamiltoniananalyticalbroad
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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As the vacuum state of a quantum field is not an eigenstate of the Hamiltonian density, the vacuum energy density can be represented as a random variable. We present an analytical calculation of the probability distribution of the vacuum energy density for real and complex massless scalar fields in Minkowski space. The obtained probability distributions are broad and the vacuum expectation value of the Hamiltonian density is not fully representative of the vacuum energy density.

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