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pro vyhledávání: '"Alhassid, Y"'
Autor:
Özen, C., Alhassid, Y.
Level densities are often parametrized using the back-shifted Bethe formula (BBF) for nuclei that possess experimental data for s-wave neutron resonance average spacings and a complete discrete level sequence at low excitation energies. However, thes
Externí odkaz:
http://arxiv.org/abs/2411.19940
The Fermi polaron problem, which describes a mobile impurity that interacts with a spin-polarized Fermi sea, is a paradigmatic system in quantum many-body physics and has been challenging to address quantitatively in its strong coupling regime. We pr
Externí odkaz:
http://arxiv.org/abs/2410.00886
Autor:
DeMartini, D., Alhassid, Y.
We compute the magnetic dipole (M1) $\gamma$-ray strength functions ($\gamma$SF) for the odd-mass lanthanides $^{143-151}$Nd and $^{147-153}$Sm using the shell-model Monte Carlo method in combination with the static-path approximation and the maximum
Externí odkaz:
http://arxiv.org/abs/2410.00109
The unitary Fermi gas (UFG) is a strongly correlated system of two-species (spin-1/2) fermions with a short-range attractive interaction modeled by a contact interaction and has attracted much interest across different disciplines. The UFG is conside
Externí odkaz:
http://arxiv.org/abs/2408.16676
We calculate the magnetic dipole $\gamma$-ray strength functions in a chain of even-mass neodymium isotopes $^{144-152}$Nd in the framework of the configuration-interaction (CI) shell model. We infer the strength function by applying the maximum entr
Externí odkaz:
http://arxiv.org/abs/2407.06161
Conventional diagonalization methods to calculate nuclear energy levels in the framework of the configuration-interaction (CI) shell model approach are prohibited in very large model spaces. The shell model Monte Carlo (SMMC) is a powerful technique
Externí odkaz:
http://arxiv.org/abs/2401.00613
A low-energy enhancement (LEE) has been observed in the deexcitation $\gamma$-ray strength function ($\gamma$SF) of compound nuclei. The LEE has been a subject of intense experimental and theoretical interest since its discovery, and, if the LEE pers
Externí odkaz:
http://arxiv.org/abs/2401.00591
The shell model Monte Carlo (SMMC) method is a powerful method for calculating exactly (up to statistical errors) thermal observables and statistical properties of atomic nuclei. However, its application has been limited by a sign problem at low temp
Externí odkaz:
http://arxiv.org/abs/2308.14698
The two-species Fermi gas with attractive short-range interactions in two spatial dimensions provides a paradigmatic system for the understanding of strongly correlated Fermi superfluids in two dimensions. It is known to exhibit a BEC-BCS crossover a
Externí odkaz:
http://arxiv.org/abs/2212.14880
Autor:
Alhassid, Y.
Publikováno v:
Springer Proceedings in Physics 254, pp. 97-112, Springer, 2021
The level density is among the most important statistical nuclear properties. It appears in Fermi's golden rule for transition rates and is an important input to the Hauser-Feshbach theory of compound nucleus reactions. We discuss empirical models of
Externí odkaz:
http://arxiv.org/abs/2112.14253