Quasiparticle Stability of Dilute Two Component Bose - Einstein
نویسندگان
چکیده
We consider a dilute atomic Bose-Einstein condensate with two non-degenerate internal energy levels. The presence of an external radiation field can result in new ground states for the condensate which result from the lowering of the condensate energy due to the interaction energy with the field. In this approach there are no instabilities in the quasiparticle spectrum as was
منابع مشابه
Quantized circulation in dilute Bose–Einstein condensates
We compute using a microscopic mean-field theory the structure and the quasiparticle excitation spectrum of a dilute, trapped Bose–Einstein condensate penetrated by an axisymmetric vortex line. The Gross–Pitaevskii equation for the condensate and the coupled Hartree–Fock–Bogoliubov–Popov equations describing the elementary excitations are solved self-consistently using finite-difference methods...
متن کاملExcitation spectrum of three dressed Bose-Einstein condensates
We study quantum dynamics of three dressed Bose-Einstein condensates in a high-Q cavity. The quasiparticle excitation spectrum of this system is found numerically. The stability of the quasiparticle excitation is analyzed. It is shown that there exist instabilities in the excitation spectrum. Typeset using REVTEX 1 ] Recently, multicomponent Bose-Einstein condensates (MBEC’s) [1,2] have attract...
متن کاملCollisionless and Hydrodynamic Excitations of a Bose-Einstein Condensate
Collective excitations of a dilute Bose gas were probed above and below the Bose-Einstein condensation temperature. The temperature dependencies of the frequency and damping rates of condensate oscillations indicate significant interactions between the condensate and the thermal cloud. Hydrodynamic oscillations of the thermal cloud analogous to first sound were observed. An outof-phase dipolar ...
متن کاملDynamic Properties of Dilute Bose-Einstein Condensates
In this thesis, a new apparatus for the study of Bose-Einstein condensation is described, and the first two experiments performed with the new device are discussed. The new instrument was constructed for the creation of dilute gas sodium Bose-Einstein condensates, and features an optical quality quartz cell, a high-flux spin-flip Zeeman slower, a tightly confining magnetic trap, and a high-reso...
متن کاملQuasiparticle spectrum for the dilute Bose-gas in an inhomogeneous external field
The paper deals with the properties of Bose-gases in the inhomogeneous external fields at very low temperatures, when a Bose-Einstein condensation occurs. This particularly refers to the trapped alkali gases, which are of great experimental and theoretical interest during last few years. The system is considered here in the frame of the developed approach closed to the Bogoliubov’s one with nec...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2000