Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Pavaskar, Shashin"'
Autor:
Pavaskar, Shashin, Rothstein, Ira Z.
Recently the authors have developed an effective field theory formalism to systematically describe cold fermionic gases near the unitary limit. The theory has enhanced predictive power due to the fact that interactions are dominated by the exchange o
Externí odkaz:
http://arxiv.org/abs/2409.18379
Autor:
Pavaskar, Shashin, Rothstein, Ira Z.
In this letter we show that the dispersion relation for the dynamical modes of dislocations in solids is sensitive to the lattice symmetries. In particular, we make the sharp prediction that the transverse oscillations of dislocations obey a canonica
Externí odkaz:
http://arxiv.org/abs/2212.10587
Autor:
Esposito, Angelo, Pavaskar, Shashin
Publikováno v:
Phys. Rev. D 108, L011901 (2023)
We propose anti-ferromagnets as optimal targets to hunt for sub-MeV dark matter with spin-dependent interactions. These materials allow for multi-magnon emission even for very small momentum transfers, and are therefore sensitive to dark matter parti
Externí odkaz:
http://arxiv.org/abs/2210.13516
Publikováno v:
SciPost Phys. 12, 155 (2022)
We utilize the coset construction to derive the effective field theory of magnon-phonon interactions in (anti)-ferromagnetic and ferrimagnetic insulating materials. The action is used to calculate the equations of motion which generalize the Landau-L
Externí odkaz:
http://arxiv.org/abs/2112.13873
Autor:
Pavaskar, Shashin, Rothstein, Ira Z.
This paper explores the behavior of systems of cold fermions as they approach unitarity above the critical temperature. As we move away from unitarity, by decreasing the scattering length, the dilaton, the Goldstone boson resulting from the spontaneo
Externí odkaz:
http://arxiv.org/abs/2103.09339
Due to the absence of degeneracy in one dimension, when a parameter, $\lambda$, of a potential is varied slowly the discrete energy eigenvalue curves, $E_n(\lambda)$, cannot cross but they are allowed to come quite close and diverge from each other.
Externí odkaz:
http://arxiv.org/abs/1508.00661
Publikováno v:
Eur. J. Phys. 36 (2015) 048001
Hitherto, a finitely thick barrier next to a well or a rigid wall has been considered the potential of simplest shape giving rise to resonances (metastable states) in one dimension: $x \in(-\infty, \infty)$. In such a potential, there are three real
Externí odkaz:
http://arxiv.org/abs/1504.00115
Investigation of scattering from rising potentials has just begun, these unorthodox potentials have earlier gone unexplored. Here, we obtain reflection amplitude ($r(E)$) for scattering from a two-piece rising exponential potential: $V(x\le 0)=V_1[1-
Externí odkaz:
http://arxiv.org/abs/1408.2367
We study scattering from potentials that rise monotonically on one side; this is generally avoided. We report that resonant states are absent in such potentials when they are smooth and single-piece having less than three real turning points (like in
Externí odkaz:
http://arxiv.org/abs/1408.0231
We study an anti-symmetric (square) well and barrier potential of depth/height $(V_0)$ placed between two rigid walls. Unlike the usual double-well, here the closely lying sub-barrier doublets need not be the lowest ones in the spectrum. When $V_0$ a
Externí odkaz:
http://arxiv.org/abs/1406.4761