5 papers
Note on "Sonic Mach cones induced by fast partons in a perturbative quark-gluon plasma" arXiv:0802.2254
Zotin K. -H. Chu
We make remarks on Neufeld {\it et al.}'s [{\it Phys. Rev. C} 78, 041901(R) (2008), arXiv:0802.2254] paper especially about the Mach cone formation. We argue that the original bow…
Possible Superfluidity in thin corrugated Annulus
Zotin K. -H. Chu
We revisit the persistent flow of a superfluid in a thin wavy-rough annulus. The existence of a phase memory around this thin corrugated annulus is shown to be responsible for the…
Population Inversion, Negative Temperature, and Quantum Degeneracies
Zotin K. -H. Chu
We revisit the basic principle for lasing : Population inversion which is nevertheless closely linked to the negative temperature state in non-equilibrium thermodynamics. With the…
Optical Pumping : Experiment and Theory Revisited
Zotin K. -H. Chu
The objective of this paper is to share our enthusiasm for optical pumping experiments and to encourage their use in researches on practical physics. The experimental technique has…
Possible Knot-type Time-dependent Quantum-mechanically Dynamical System
Zotin K. -H. Chu
We illustrate schematically a possible traversing along the path of trefoil-type and knots during a specific time period by considering a quantum-mechanic system which sat…