I'm working with CAMB and need to calculate the cross-correlation power spectrum between the Cold Dark Matter (CDM) density and the Weyl potential. Can you tell me what the specific variable names or identifiers are for these quantities in CAMB's power spectrum functions, and how to specify their cross-correlation?
Navigate to the official CAMB documentation at camb.readthedocs.io. Locate and navigate to the 'Matter power spectrum and matter transfer function variables' section. Identify the variable name for Cold Dark Matter (CDM) density. Identify the variable name for the Weyl potential. Confirm how to request the cross-correlation power spectrum using these identified variables.
State that the variable name for CDM density is 'delta_cdm'. State that the variable name for the Weyl potential is 'Weyl'. Confirm that the cross-correlation power spectrum can be obtained by requesting these two variables (e.g., using 'var1' and 'var2' parameters like var1='delta_cdm', var2='Weyl').