Squeezing Properties of Two-Mode SU (1,1) Coherent States Interacting with Bose-Einstein Condensate of V-Type Three-Level Atoms

2009 ◽  
Vol 29 (7) ◽  
pp. 2006-2010
Author(s):  
赵建刚 Zhao Jiangang ◽  
孙长勇 Sun Changyong ◽  
闫丽华 Yan Lihua
Keyword(s):  
Coherent States ◽  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Bose Einstein

QUANTUM TELEPORTATION FROM LIGHT TO ATOMIC BOSE–EINSTEIN CONDENSATE

2010 ◽  
Vol 24 (10) ◽  
pp. 937-944 ◽  
Author(s):  
YU GUO ◽  
RONG-SHENG QU
Keyword(s):  
Coherent State ◽  
Quantum Teleportation ◽  
Coherent States ◽  
Einstein Condensate ◽  
Kerr Medium ◽  
Optical Scheme ◽  
Optical Elements ◽  
Beam Splitters ◽  
Bose Einstein Condensate ◽  
Bose Einstein

An optical scheme of the quantum teleportation of superposed coherent states from light pulse to the atoms in Bose–Einstein condensate in terms of optical elements is presented. Beam splitters, photodetectors, cross-Kerr medium, and coherent state sources are needed in this scheme. The probability of successful teleportation is also obtained.

scholarly journals Intrinsic Decoherence and Recurrences in a Large Ferromagnetic F = 1 Spinor Bose–Einstein Condensate

Symmetry ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 67
Author(s):  
Juan Carlos Sandoval-Santana ◽  
Roberto Zamora-Zamora ◽  
Rosario Paredes ◽  
Victor Romero-Rochín
Keyword(s):  
Density Matrix ◽  
Coherent States ◽  
Rotational Symmetry ◽  
Einstein Condensate ◽  
Body Density ◽  
Intrinsic Decoherence ◽  
Bose Einstein Condensate ◽  
Spin Interactions ◽  
The One ◽  
Bose Einstein

Decoherence with recurrences appear in the dynamics of the one-body density matrix of an F=1 spinor Bose–Einstein condensate, initially prepared in coherent states, in the presence of an external uniform magnetic field and within the single mode approximation. The phenomenon emerges as a many-body effect of the interplay of the quadratic Zeeman effect, which breaks the rotational symmetry, and the spin-spin interactions. By performing full quantum diagonalizations, a very accurate time evolution of large condensates is analyzed, leading to heuristic analytic expressions for the time dependence of the one-body density matrix, in the weak and strong interacting regimes, for initial coherent states. We are able to find accurate analytical expressions for both the decoherence and the recurrence times, in terms of the number of atoms and strength parameters, which show remarkable differences depending on the strength of the spin-spin interactions. The features of the stationary states in both regimes are also investigated. We discuss the nature of these limits in light of the thermodynamic limit.

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.

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