  We propose a nuclear mechanism which can induce an atomic electric dipole
moment (EDM). Parity and time reversal violating (P,T-odd) nuclear forces
generate a mixed P,T-odd nuclear polarizability beta_{ik} (defined by an energy
shift U = -beta_{ik} E_{i}H_{k}, E is electric field and H magnetic field). The
interaction of atomic electrons with beta_{ik} produces an atomic EDM. We
performed an analytical calculation of the P,T-odd nuclear polarizability and
estimated the value for the induced atomic EDM. The measurements of atomic EDMs
can provide information about P,T-odd nuclear forces and test models of
CP-violation.
