Renormalized Interactions for CI constrained by EDF methods Alex Brown, Angelo Signoracci and Morten...
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Transcript of Renormalized Interactions for CI constrained by EDF methods Alex Brown, Angelo Signoracci and Morten...
Renormalized Interactions for CI constrained by EDF methods
Alex Brown, Angelo Signoracci and Morten Hjorth-Jensen
Wick’s theorem for a Closed-shell vacuumfilled orbitals
Closed-shell vacuumfilled orbitals
EDF (Skyrme Phenomenology)
Closed-shell vacuumfilled orbitals
EDF (Skyrme) phenomenology
NN potential with V_lowk
Closed-shell vacuumfilled orbitals
EDF (Skyrme) phenomenology
“tuned” valence two-body matrix elements
Closed-shell vacuumfilled orbitals
EDF (Skyrme) phenomenology
Monopole from EDF
Closed-shell vacuumfilled orbitals
A3 A2 A 1
Monopole from EDF
Aspects of evaluating a microscopic two-body Hamiltonian (N3LO + Vlowk+ core-polarization) in a spherical EDF (energy-density functional) basis (i.e. Skyrme HF)
1)TBME (two-body matrix elements): Evaluate N3LO + Vlowk
with radial wave functions obtained with EDF.2)TBME: Evaluate core-polarization with an underlying single-particle spectrum obtained from EDF.3)TBME: Calculate monopole corrections from EDF that would implicitly include an effective three-body interaction of the valence nucleons with the core.4)SPE for CI: Use EDF single-particle energies – unless something better is known experimentally.
Why use energy-density functionals (EDF)?
1)Parameters are global and can be extended to nuclear matter.2)Effort by several groups to improve the understanding and reliability (predictability) of EDF – in particular the UNEDF SciDAC project in the US.3)This will involve new and extended functionals.4)With a goal to connect the values of the EDF parameters to the NN and NNN interactions.5)At this time we have a reasonably good start with some global parameters – for now I will use Skxmb – Skxm from [BAB, Phys. Rev. C58, 220 (1998)] with small adjustment for lowest single-particle states in 209Bi and 209Pb.
Calculations in a spherical basis with no correlations
What do we get out of (spherical) EDF?
1)Binding energy for the closed shell2)Radial wave functions in a finite-well (expanded in terms of harmonic oscillator). 3) gives single-particle energies for the nucleons constrained to be in orbital (n l j)a where BE(A) is a doubly closed-shell nucleus.
4)
gives the monopole two-body matrix element for nucleons constrained to be in orbitals (n l j)a and (n l j)b
EDF core energy and single-particle energy
EDF two-body monopole
Theory (ham) from Skxmb with parameters adjusted to reproducethe energy for the 9/2- state plus about 100 other global data.
218U208Pb
x = experiment
CI (ham) N3LO with EDF constraint
EDF (or CI) withno correlations
CI with N3LO
Skyrme (Skxmb) + Vlow-k N3LO (second order)
210Po
210Po Skyrme (Skxmb) + Vlow-k N3LO (first order)
213Fr Skyrme (Skxmb) + Vlow-k N3LO (second order)
214Ra Skyrme (Skxmb) + Vlow-k N3LO (second order)
EDF core energy and single-particle energy
EDF two-body monopole
Theory (ham) from Skxmb with parameters adjusted to reproducethe energy for the 9/2+ state plus about 100 other global data.
Skyrme (Skxmb) + Vlow-k N3LO (second order)
210Pb
Skyrme (Skxmb) + Vlow-k N3LO (second order)
210Bi
Skyrme (Skxmb) + Vlow-k N3LO (second order)
212Po
Skyrme (Skxmb) + Vlow-k N3LO (second order)
210Pb
Skyrme (Skxmb) + exp spe Vlow-k N3LO (second order)
210Pb
Skyrme (Skxmb) for 208Pb (closed shell) + Vlow-k N3LO (second order)
“ab-initio” calculation for absolute energies of 213Fr
Energy of first excited 2+ states