Cosmological Constant (Λ): Represents the energy density of empty space. Units: m⁻².
Reduced Planck Constant (ħ): A fundamental constant in quantum mechanics. Units: J·s.
Speed of Light (c): The speed of light in a vacuum. Units: m/s.
Hubble Constant (H₀): The rate of expansion of the universe. Units: km/s/Mpc.
Dark Energy Density Parameter (Ω_Λ): The proportion of the universe's energy density that is attributed to dark energy.
Output Unit: Choose the unit for the vacuum energy density output.