Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Gattobigio Mario"'
Quantum few-body systems are deceptively simple. Indeed, with the notable exception of a few special cases, their associated Schrodinger equation cannot be solved analytically for more than two particles. One has to resort to approximation methods to
Externí odkaz:
http://arxiv.org/abs/2408.08522
Publikováno v:
EPJ Web of Conferences, Vol 290, p 10008 (2023)
The deuteron, the only two-nucleon bound state, has a shallow character: its binding energy is strictly related to zero-energy parameters, the triplet scattering length 3anp and triplet effective range 3rnp. This fact places the deuteron inside the u
Externí odkaz:
https://doaj.org/article/34b590c16f6243eeab59881b4e96f1ef
Autor:
Gattobigio, Mario, Kievsky, Alejandro
We investigate the properties of the excited state of $^4\mathrm{He}$, $^4\mathrm{He}^*$, within the framework of Efimov physics and its connection to the unitary point of the nuclear interaction. We explore two different approaches to track the traj
Externí odkaz:
http://arxiv.org/abs/2305.16814
Autor:
Frederico, Tobias, Gattobigio, Mario
We demonstrate that a four-boson limit-cycle independent of the Efimov one appears in Hamiltonian systems at the unitary limit. The model interaction contains two-, three- and four-body short-range potentials, which disentangle the interwoven three-
Externí odkaz:
http://arxiv.org/abs/2303.14952
We study bosonic systems in the regime in which the two-body system has a shallow bound state or, equivalently, a large value of the two-body scattering length. Using the effective field theory framework as a guide, we construct a series of potential
Externí odkaz:
http://arxiv.org/abs/2206.06265
Autor:
Zen, Remmy, My, Long, Tan, Ryan, Hebert, Frederic, Gattobigio, Mario, Miniatura, Christian, Poletti, Dario, Bressan, Stephane
Finding the precise location of quantum critical points is of particular importance to characterise quantum many-body systems at zero temperature. However, quantum many-body systems are notoriously hard to study because the dimension of their Hilbert
Externí odkaz:
http://arxiv.org/abs/2002.02618
Autor:
Zen, Remmy, My, Long, Tan, Ryan, Hebert, Frederic, Gattobigio, Mario, Miniatura, Christian, Poletti, Dario, Bressan, Stephane
Publikováno v:
Phys. Rev. E 101, 053301 (2020)
Neural-network quantum states have shown great potential for the study of many-body quantum systems. In statistical machine learning, transfer learning designates protocols reusing features of a machine learning model trained for a problem to solve a
Externí odkaz:
http://arxiv.org/abs/1908.09883
Publikováno v:
Phys. Rev. C 100, 034004 (2019)
The large values of the singlet and triplet scattering lengths locate the two-nucleon system close to the unitary limit, the limit in which these two values diverge. As a consequence, the system shows a continuous scale invariance which strongly cons
Externí odkaz:
http://arxiv.org/abs/1903.08900
Publikováno v:
Phys. Rev. A 92, 053622 (2015)
We introduce a two-dimensional short-range correlated disorder that is the natural generalization of the well-known one-dimensional dual random dimer model [Phys. Rev. Lett 65, 88 (1990)]. We demonstrate that, as in one dimension, this model induces
Externí odkaz:
http://arxiv.org/abs/1510.01883
Publikováno v:
Phys. Rev. A 84, 023626 (2011)
We present the exact solution for the many-body wavefunction of a one-dimensional mixture of bosons and spin-polarized fermions with equal masses and infinitely strong repulsive interactions under external confinement. Such a model displays a large d
Externí odkaz:
http://arxiv.org/abs/1101.0702