"""
Physical constants
"""

h = 1.054e-34		# Planck constant hbar
e = 1.602e-19		# elementary charge
m0 = 9.109e-31		# electron mass
kb = 1.38e-23		# Boltzmann constant
pi = 3.14159	    # pi
c = 3.0e8			# speed of light in vacuum
eps0 = 8.854e-12    # dielectric constant
e_Ry = 13.61        # Rydberg energy in eV
