A new field-level projection produces first-order unequal-time corrections to single-tracer galaxy power spectra, both within and between redshift bins.
We do this by taking the expectation value of the product of two individually projected fields, each as described in Eq
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Projecting Unequal Time Fields and Correlators of Large Scale Structure
A new field-level projection produces first-order unequal-time corrections to single-tracer galaxy power spectra, both within and between redshift bins.