scholarly journals A compact and fast magnetic coil for the manipulation of quantum gases with Feshbach resonances

2021 ◽  
Vol 92 (9) ◽  
pp. 093202
Author(s):  
A. Kell ◽  
M. Link ◽  
M. Breyer ◽  
A. Hoffmann ◽  
M. Köhl ◽  
...  
Keyword(s):  
Quantum Gases ◽  
Feshbach Resonances ◽  
Magnetic Coil

scholarly journals Magnetic Field Manipulation Applied to Feshbach Resonances in Ultracold Quantum Gases

2015 ◽  
Vol 635 (2) ◽  
pp. 022072
Author(s):  
Tianwei Zhou ◽  
Tian Luan ◽  
Chen Li ◽  
Shizhe Li ◽  
Xuzong Chen
Keyword(s):  
Magnetic Field ◽  
Quantum Gases ◽  
Feshbach Resonances ◽  
Ultracold Quantum Gases ◽  
Field Manipulation

scholarly journals Performance Analysis and Optimization for Irreversible Combined Carnot Heat Engine Working with Ideal Quantum Gases

Entropy ◽  
2021 ◽  
Vol 23 (5) ◽  
pp. 536
Author(s):  
Lingen Chen ◽  
Zewei Meng ◽  
Yanlin Ge ◽  
Feng Wu
Keyword(s):  
Power Output ◽  
Thermal Efficiency ◽  
Combined Cycle ◽  
Quantum Gases ◽  
Carnot Cycle ◽  
Leakage Loss ◽  
Optimal Power ◽  
Heat Leakage ◽  
Working Medium ◽  
Ideal Quantum

An irreversible combined Carnot cycle model using ideal quantum gases as a working medium was studied by using finite-time thermodynamics. The combined cycle consisted of two Carnot sub-cycles in a cascade mode. Considering thermal resistance, internal irreversibility, and heat leakage losses, the power output and thermal efficiency of the irreversible combined Carnot cycle were derived by utilizing the quantum gas state equation. The temperature effect of the working medium on power output and thermal efficiency is analyzed by numerical method, the optimal relationship between power output and thermal efficiency is solved by the Euler-Lagrange equation, and the effects of different working mediums on the optimal power and thermal efficiency performance are also focused. The results show that there is a set of working medium temperatures that makes the power output of the combined cycle be maximum. When there is no heat leakage loss in the combined cycle, all the characteristic curves of optimal power versus thermal efficiency are parabolic-like ones, and the internal irreversibility makes both power output and efficiency decrease. When there is heat leakage loss in the combined cycle, all the characteristic curves of optimal power versus thermal efficiency are loop-shaped ones, and the heat leakage loss only affects the thermal efficiency of the combined Carnot cycle. Comparing the power output of combined heat engines with four types of working mediums, the two-stage combined Carnot cycle using ideal Fermi-Bose gas as working medium obtains the highest power output.

scholarly journals The Semiclassical Limit of the Gailitis Formula Applied to Electron Impact Broadening of Spectral Lines of Ionized Atoms

Atoms ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 29
Author(s):  
Sylvie Sahal-Bréchot
Keyword(s):  
Electron Impact ◽  
Classical Limit ◽  
Semiclassical Limit ◽  
Spectral Lines ◽  
Stark Broadening ◽  
Feshbach Resonances

The present paper revisits the determination of the semi-classical limit of the Feshbach resonances which play a role in electron impact broadening (the so-called “Stark“ broadening) of isolated spectral lines of ionized atoms. The Gailitis approximation will be used. A few examples of results will be provided, showing the importance of the role of the Feshbach resonances.

CH3− formation through predissociation of Feshbach resonances in acetaldehyde

1985 ◽  
Vol 118 (1) ◽  
pp. 93-96 ◽  
Author(s):  
Rainer Dressler ◽  
Michael Allan
Keyword(s):  
Feshbach Resonances

Zero-field MAMMOS recording system with a blue laser, NA=0.95 lens, fast magnetic coil, and thin cover layer

2003 ◽  
Author(s):  
Ferry Zijp ◽  
Ruud J. M. Vullers ◽  
H. W. van Kesteren ◽  
Martin B. van der Mark ◽  
C. A. van den Heuvel ◽  
...  
Keyword(s):  
Recording System ◽  
Blue Laser ◽  
Zero Field ◽  
Cover Layer ◽  
Magnetic Coil

scholarly journals Nonequilibrium steady states of ideal bosonic and fermionic quantum gases

2015 ◽  
Vol 92 (6) ◽  
Author(s):  
Daniel Vorberg ◽  
Waltraut Wustmann ◽  
Henning Schomerus ◽  
Roland Ketzmerick ◽  
André Eckardt
Keyword(s):  
Steady States ◽  
Quantum Gases ◽  
Nonequilibrium Steady States
Sign in / Sign up

Export Citation Format

Share Document