Charged stellar model with three layers

2022 ◽  
Vol 21 (12) ◽  
pp. 310
Author(s):  
Avirt S. Lighuda ◽  
Jefta M. Sunzu ◽  
Sunil D. Maharaj ◽  
Eunice W. Mureithi
Keyword(s):  
Electric Field ◽  
Core Layer ◽  
Stellar Model ◽  
Einstein Condensate ◽  
Field Equations ◽  
Physical Conditions ◽  
Bose Einstein Condensate ◽  
Interior Layers ◽  
Neutral Models ◽  
Bose Einstein

Abstract We establish new charged stellar models from the Einstein-Maxwell field equations for relativistic superdense objects outfitted with three layers. The core layer is described by a linear equation of state (EoS) describing quark matter, while the intermediate layer is described by a Bose-Einstein condensate EoS for Bose-Einstein condensate matter and the envelope layers satisfying a quadratic EoS for the neutron fluid. We have specified a new choice of the electric field and one of the metric potentials. It is interesting to note that the choice of electric field in this model can be set to vanish and we can regain earlier neutral models. Plots generated depict that the matter variables, gravitational potentials and other physical conditions are consistent with astrophysical studies. The interior layers and exterior boundary are also matched.

RAPIDLY ROTATING BOSE–EINSTEIN CONDENSATES IN AN APPLIED ELECTRIC FIELD

2008 ◽  
Vol 22 (17) ◽  
pp. 2691-2699
Author(s):  
LI-HUA LU ◽  
YOU-QUAN LI
Keyword(s):  
Electric Field ◽  
Density Distribution ◽  
External Electric Field ◽  
Applied Electric Field ◽  
Vortex Lattice ◽  
Particle Density ◽  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Particle Density Distribution ◽  
Bose Einstein

The rapidly rotating Bose–Einstein condensate in the presence of an external electric field is studied. The vortex lattice formed in the condensate will shift after the electric field is applied. The electric field changes the particle density distribution and makes the system more stable. A method to detect this shift is also suggested.

CONVERSION FROM ATOMIC TO MOLECULAR BOSE–EINSTEIN CONDENSATE VIA CHAINWISE ADIABATIC PASSAGE

2013 ◽  
Vol 27 (15) ◽  
pp. 1350109 ◽  
Author(s):  
JIAN LI ◽  
YONG LIU ◽  
SHU-LIN CONG
Keyword(s):  
Conversion Efficiency ◽  
Pulse Sequence ◽  
Mean Field ◽  
Einstein Condensate ◽  
Adiabatic Passage ◽  
Field Equations ◽  
Vibrational States ◽  
Bose Einstein Condensate ◽  
Mean Field Equations ◽  
Bose Einstein

We present an approach for effectively converting atomic Bose–Einstein condensate (BEC) into molecular one. Atoms are converted into molecules through a series of intermediate vibrational states by using chainwise stimulated Raman adiabatic passage technique. We utilize a feasible pulse sequence to achieve higher conversion efficiency by solving the coupled mean-field equations. As an example, we investigate the formation of Rb 2 and calculate conversion efficiency to be 92.3%.

scholarly journals Transport of a Single Cold Ion Immersed in a Bose-Einstein Condensate

2021 ◽  
Vol 126 (3) ◽  
Author(s):  
T. Dieterle ◽  
M. Berngruber ◽  
C. Hölzl ◽  
R. Löw ◽  
K. Jachymski ◽  
...  
Keyword(s):  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Bose Einstein

scholarly journals Ultrafast electron cooling in an expanding ultracold plasma

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tobias Kroker ◽  
Mario Großmann ◽  
Klaus Sengstock ◽  
Markus Drescher ◽  
Philipp Wessels-Staarmann ◽  
...  
Keyword(s):  
Theoretical Models ◽  
Einstein Condensate ◽  
Direct Access ◽  
Electron Cooling ◽  
Plasma Dynamics ◽  
Strongly Coupled ◽  
Bose Einstein Condensate ◽  
Ultracold Plasma ◽  
Strongly Coupled Plasma ◽  
Bose Einstein

AbstractPlasma dynamics critically depends on density and temperature, thus well-controlled experimental realizations are essential benchmarks for theoretical models. The formation of an ultracold plasma can be triggered by ionizing a tunable number of atoms in a micrometer-sized volume of a 87Rb Bose-Einstein condensate (BEC) by a single femtosecond laser pulse. The large density combined with the low temperature of the BEC give rise to an initially strongly coupled plasma in a so far unexplored regime bridging ultracold neutral plasma and ionized nanoclusters. Here, we report on ultrafast cooling of electrons, trapped on orbital trajectories in the long-range Coulomb potential of the dense ionic core, with a cooling rate of 400 K ps−1. Furthermore, our experimental setup grants direct access to the electron temperature that relaxes from 5250 K to below 10 K in less than 500 ns.

Sign in / Sign up

Export Citation Format

Share Document