Coupled-cluster theory computation of the nuclear electric dipole polarizability

The electric dipole polarizability $\alpha_D$ is strongly correlated with the size of atomic nuclei. It informs us about the neutron equation of state and links atomic nuclei to neutron stars. In recent years, scattering experiments have been used to determine the dipole polarizability in $^{208}$Pb [1], $^{120}$Sn [2] and $^{68}$Ni [3]. Combining the Lorentz integral transform with the coupled-cluster method allows us to perform ab initio computations of $\alpha_D$ for medium mass nuclei [4,5]. In Ref. [6] we predicted the polarizability for $^{48}$Ca and presently we are investigating heavier systems such as $^{68}$Ni and $^{90}$Zn. [1] A. Tamii et al., Phys. Rev. Lett. 107, 062502 (2011). [2] T. Hashimoto et al., Phys. Rev. C 92 031305 (2015). [3] D.M. Rossi, et al., Phys. Rev. Lett. 111, 242503 (2013). [4] S. Bacca, N. Barnea, G. Hagen, M. Miorelli, G. Orlandini and T. Papenbrock, Phys. Rev. C 90, 064619 (2014). [5] M. Miorelli, S. Bacca, N. Barnea, G. Hagen, G. Orlandini and T. Papenbrock, in preparation. [6] G. Hagen, et al., Nature Physics, 3529 (2015).