Cross-correlations between quantum degrees of freedom are required for consistent effective dynamics in Brans-Dicke Bianchi I cosmology, smoothing bounces and keeping energy density finite.
The metric takes the diagonal form ds2 =−N 2dt2 +a 2 1(t)dx2 1 +a 2 2(t)dx2 2 +a 2 3(t)dx2 3,(2) whereN(t) is the lapse function anda i(t) are directional scale factors
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Quantum Backreaction in Effective Brans-Dicke Bianchi I Cosmology
Cross-correlations between quantum degrees of freedom are required for consistent effective dynamics in Brans-Dicke Bianchi I cosmology, smoothing bounces and keeping energy density finite.