Zobrazeno 1 - 10
of 32
pro vyhledávání: '"G. M. Koutentakis"'
Publikováno v:
Physical Review Research, Vol 6, Iss 1, p 013257 (2024)
We demonstrate the failure of the adiabatic Born-Oppenheimer approximation to describe the ground state of a quantum impurity within an ultracold Fermi gas despite substantial mass differences between the bath and impurity species. Increasing repulsi
Externí odkaz:
https://doaj.org/article/c1a43bf1ab054cb4bb4423613f0dd82d
Publikováno v:
Physical Review Research, Vol 5, Iss 4, p 043039 (2023)
We investigate spin-charge separation of a spin-1/2 Fermi system confined in a triple well where multiple bands are occupied. We assume that our finite fermionic system is close to fully spin polarized while being doped by a hole and an impurity ferm
Externí odkaz:
https://doaj.org/article/e7508a26ba3b484298dec5e74ce3b4f6
Publikováno v:
Physical Review Research, Vol 2, Iss 3, p 033380 (2020)
We propose and investigate a pump-probe spectroscopy scheme to unveil the time-resolved dynamics of fermionic or bosonic impurities immersed in a harmonically trapped Bose-Einstein condensate. In this scheme a pump pulse initially transfers the impur
Externí odkaz:
https://doaj.org/article/7ae38cff8346450a92fda7b6b5a4b56f
Publikováno v:
New Journal of Physics, Vol 24, Iss 8, p 083030 (2022)
We investigate the formation of magnetic Bose polaron, an impurity atom dressed by spin-wave excitations, in a one-dimensional spinor Bose gas. Within an effective potential model, the impurity is strongly confined by the host excitations which can e
Externí odkaz:
https://doaj.org/article/198f872339f34c6081fc33fed44f0ae0
Publikováno v:
New Journal of Physics, Vol 23, Iss 4, p 043051 (2021)
We investigate the crossover of the impurity-induced dynamics, in trapped one-dimensional Bose polarons subject to radio frequency (RF) pulses of varying intensity, from an adiabatic to a diabatic regime. Utilizing adiabatic pulses for either weak re
Externí odkaz:
https://doaj.org/article/2a411bde9ac7489caf8cb7f37b4fb879
Publikováno v:
New Journal of Physics, Vol 22, Iss 6, p 063058 (2020)
We explore the stability of the phase separation phenomenon in few-fermion spin-1/2 systems confined in a double-well potential. It is shown that within the SU(2) symmetric case, where the total spin is conserved, the phase separation cannot be fully
Externí odkaz:
https://doaj.org/article/71d022fac38b40cca1091bb2e36305e7
Publikováno v:
New Journal of Physics, Vol 22, Iss 4, p 043007 (2020)
We study the ground state properties and non-equilibrium dynamics of two spinor bosonic impurities immersed in a one-dimensional bosonic gas upon applying an interspecies interaction quench. For the ground state of two non-interacting impurities we r
Externí odkaz:
https://doaj.org/article/50f9cd11da2a4d49850bd8e2e2aad93c
Publikováno v:
New Journal of Physics, Vol 21, Iss 10, p 103026 (2019)
We unravel the nonequilibrium correlated quantum quench dynamics of an impurity traveling through a harmonically confined Bose–Einstein condensate in one-dimension. For weak repulsive interspecies interactions the impurity oscillates within the bos
Externí odkaz:
https://doaj.org/article/6e8c7c90f32745219a71ccf6e16477a8
Publikováno v:
New Journal of Physics, Vol 21, Iss 4, p 043032 (2019)
We explore repulsive Fermi polarons in one-dimensional harmonically trapped few-body mixtures of ultracold atoms using as a case example a ^6 Li- ^40 K mixture. A characterization of these quasiparticle-like states, whose appearance is signaled in th
Externí odkaz:
https://doaj.org/article/623059c1f6c94781903fa8440b45e478
Publikováno v:
New Journal of Physics, Vol 21, Iss 5, p 053005 (2019)
We unravel the dynamical stability of a fully polarized one-dimensional ultracold few-fermion spin-1/2 gas subjected to inhomogeneous driving of the itinerant spins. Despite the unstable character of the total spin-polarization the existence of an in
Externí odkaz:
https://doaj.org/article/a3715bdeecd043cd9e00e5cb5835b0eb