16 citations · 29 across the 14 of their papers we have counts for
14 papers
Quantum Calculations of the Cavity Shift in Electron Magnetic Moment Measurements
Hannah Day, Roni Harnik, Yonatan Kahn +2
The measurement of the anomalous electron magnetic moment through quantum transitions of a single trapped electron is the most stringent test of quantum field theory. These e…
Hunting axion dark matter with anti-ferromagnets: a case study with nickel oxide
Pier Giuseppe Catinari, Angelo Esposito, Shashin Pavaskar
We show that nickel oxide, which is already a very promising target to look for sub-MeV dark matter scattering, can be employed to hunt axion dark matter, with masses in the meV ra…
An EFT for anisotropic anti-ferromagnets: gapped Goldstones, pseudo-Goldstones, and phase transitions
Pier Giuseppe Catinari, Angelo Esposito, Shashin Pavaskar
We build and discuss a low energy effective field theory for anisotropic anti-ferromagnets in presence of an external magnetic field. Such an effective theory is simple yet rich, a…
First Principle Predictions for Cold Fermionic Gases Near Criticality via Critical Boson Dominance and Anomaly Matching
Shashin Pavaskar, Ira Z. Rothstein
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 p…
Dispersion Relations for Dislocation Modes and their Sensitivity to the Lattice Structure
Jin-Yun Lin, Shashin Pavaskar, Ira Z. Rothstein
In this letter we show that the dispersion relation for the dynamical modes of dislocations ("dislons") in solids is sensitive to the lattice symmetries. In particular, we show tha…
Optimal anti-ferromagnets for light dark matter detection
Angelo Esposito, Shashin Pavaskar
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 smal…
An Effective Field Theory of Magneto-Elasticity
Shashin Pavaskar, Riccardo Penco, Ira Z. Rothstein
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 u…
First Principles Prediction of the Landau Parameter for Fermi Liquids near the Unitarity Limit
Shashin Pavaskar, Ira Z. Rothstein
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…
Avoided crossings of energy levels in one-dimension
Zafar Ahmed, Shashin Pavaskar, Dhruv Sharma +1
Due to the absence of degeneracy in one dimension, when a parameter, , of a potential is varied slowly the discrete energy eigenvalue curves, , cannot cross but they are…
New shape resonances in one dimension
Zafar Ahmed, Shashin Pavaskar, Lakshmi Prakash
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…
Non-catastrophic resonant states in one dimensional scattering from a rising exponential potential
Zafar Ahmed, Lakshmi Prakash, Shashin Pavaskar
Investigation of scattering from rising potentials has just begun, these unorthodox potentials have earlier gone unexplored. Here, we obtain reflection amplitude () for scatt…
One dimensional scattering from two-piece rising potentials: a new avenue of resonances
Zafar Ahmed, Shashin Pavaskar, Lakshmi Prakash
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 smoot…
Anti-symmetric square well and barrier potential between two rigid walls
Zafar Ahmed, Shashin Pavaskar, Indresh Yadav +1
We study an anti-symmetric (square) well and barrier potential of depth/height placed between two rigid walls. Unlike the usual double-well, here the closely lying sub-barr…
Special rectangular (double-well and hole) potentials
Zafar Ahmed, Tanayveer Bhatia, Shashin Pavaskar +1
We revisit a rectangular barrier as well as a rectangular well (pit) between two rigid walls. The former is the well known double-well potential and the latter is a hole potential.…