New theoretical approaches to Bose polarons

F Grusdt, E Demler - Quantum Matter at Ultralow Temperatures, 2016 - ebooks.iospress.nl
The Frehlich polaron model describes a ubiquitous class of problems concerned with
understanding the properties of a single mobile particle interacting with a bosonic reservoir …

Polaronic mass renormalization of impurities in Bose-Einstein condensates: Correlated Gaussian-wave-function approach

YE Shchadilova, F Grusdt, AN Rubtsov, E Demler - Physical Review A, 2016 - APS
We propose a class of variational Gaussian wave functions to describe Fröhlich polarons at
finite momenta. Our wave functions give polaron energies that are in excellent agreement …

Impurity magnetopolaron in a parabolic quantum dot: the squeezed-state variational approach

BS Kandemir, A Cetin - Journal of Physics: Condensed Matter, 2005 - iopscience.iop.org
We present a calculation of the ground-state binding energy of an impurity magnetopolaron
confined in a three-dimensional (3D) parabolic quantum dot potential, in the framework of a …

Generalized Hartree-Fock-Bogoliubov description of the Fröhlich polaron

B Kain, HY Ling - Physical Review A, 2016 - APS
We adapt the generalized Hartree-Fock-Bogoliubov (HFB) method to an interacting many-
phonon system free of impurities. The many-phonon system is obtained from applying the …

Variational principle for quantum impurity systems in and out of equilibrium: Application to Kondo problems

Y Ashida, T Shi, MC Banuls, JI Cirac, E Demler - Physical Review B, 2018 - APS
We provide a detailed formulation of the recently proposed variational approach [Y. Ashida,
T. Shi, M.-C. Bañuls, JI Cirac, and E. Demler, Phys. Rev. Lett. 121, 026805 (2018)] …

A variational approach with squeezed-states for the polaronic effects in quantum dots

N Kervan, T Altanhan, A Chatterjee - Physics Letters A, 2003 - Elsevier
The polaronic effects for an electron confined in a parabolic quantum dot are investigated by
means of squeezed states. A variational calculation is performed to obtain the polaronic …

Enhanced Stability of Self-Bound Droplets in Quasi-One Dimension via Interspecies Quantum Fluctuations in Ultracold Bose–Bose Mixtures

A Mehedi, M Benarous, A Hocine - Journal of Low Temperature Physics, 2024 - Springer
Considering both interspecies and intraspecies quantum fluctuations in quasi-one
dimensional ultracold Bose–Bose mixtures, we show that new LHY-like effects lead to …

Some properties of large polarons with squeezed states

BS Kandemir, T Altanhan - Journal of Physics: Condensed …, 1994 - iopscience.iop.org
The effective mass of the Frohlich polaron is calculated with the two-mode squeezed states
in the intermediate-coupling region and found to be in close agreement, with the results of …

Polaron states in a double quantum ring structure in the presence of electric and magnetic fields

A Shahbandari, MA Yeranosyan… - Superlattices and …, 2013 - Elsevier
In the framework of Landau–Pekar theory, we study the polaron problem in the double
quantum ring structures within theeffectivemassapproximation in the presence of …

Generalized stability conditions for binary bose mixtures

B Mohamed, H Ahmed, M Atika - arXiv preprint arXiv:2308.13608, 2023 - arxiv.org
Considering both interspecies and intraspecies fluctuations in ultracold bose-bose mixtures,
we derive generalized stability conditions against collapse and phase separation …