Gebundene Paare in Fermi-Fl�ssigkeiten

Wenn drei Körper mehr sind als drei Paare

Das Superpositionsprinzip ist ein zentrales Konzept der Physik. So lassen sich mit seiner Hilfe mehrere gleichzeitig an ein Teilchen angreifende Kräfte zu einer einzigen effektiven Kraft zusammenfassen, was Probleme oft wesentlich vereinfacht. Doch nicht immer genügt es, die Gesamtwechselwirkung eines Systems als Summe von Paarwechselwirkungen aufzufassen. Es gibt durchaus Fälle, wo die Wechsel...

Normal Fermi-Walker Derivative in E_{1}^{3}

In this paper, firstly, in $E_1^3$, we defined normal Fermi-Walker derivative and applied for the adapted frame. Normal Fermi-Walker parallelism, normal non-rotating frame, and Darboux vector expressions of normal Fermi-Walker derivative by normal Fermi-Walker derivative are given for adapted frame. Being conditions of normal Fermi-Walker derivative and normal non-rotating frame are examined fo...

Quantum Degeneracy in an Atomic Fermi-Fermi-Bose Mixture

This thesis deals with dilute fermionic and bosonic quantum gases in the nK temperature regime. In the work presented here, the first quantum-degenerate mixture of two different fermionic atomic species and the first triple-degenerate Fermi-Fermi-Bose mixture were produced. The quantum-degenerate mixtures were realized using sympathetic cooling of the fermionic species 6Li and 40K by an evapora...

Gradient catastrophe and Fermi-edge resonances in Fermi gas.

Any smooth spatial disturbance of a degenerate Fermi gas inevitably becomes sharp. This phenomenon, called the gradient catastrophe, causes the breakdown of a Fermi sea to multiconnected components characterized by multiple Fermi points. We argue that the gradient catastrophe can be probed through a Fermi-edge singularity measurement. In the regime of the gradient catastrophe the Fermi-edge sin...

Dipole Moments in Thomas-Fermi-Dirac and Thomas-Fermi Theories