Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Bao, Chengguang"'
Condensate of spin-1 atoms frozen in a unique spatial mode may possess large internal degrees of freedom. The scattering amplitudes of polarized cold atoms scattered by the condensate are obtained with the method of fractional parentage coefficients
Externí odkaz:
http://arxiv.org/abs/1704.04624
A 2-level spin-system of cold sodium atoms is proposed. Both the cases that the system has arrived at thermo-equilibrium and is in the early stage of evolution have been studied. This system is inert to the magnetic field $B$ in general but very sens
Externí odkaz:
http://arxiv.org/abs/1309.4148
We study the thermodynamic properties of cold spin-1 atoms with a fixed magnetization M and decoupled from spatial modes. Three temperature domains are found: (0, T1) is a domain of second condensation, namely, both the spatial and spin degrees of fr
Externí odkaz:
http://arxiv.org/abs/1309.1933
Autor:
Bao, Chengguang
In some special zones of the high-dimensional coordinate space of few-body systems with identical particles, the operation of an element (or a product of elements) of the symmetry groups of the Hamiltonian on a quantum state might be equivalent to th
Externí odkaz:
http://arxiv.org/abs/1303.6757
The effects of two distinct operations of the elements of the symmetry groups of a Hamiltonian on a quantum state might be equivalent in some specific zones of coordinate space. Making use of the matrix representations of the groups, the equivalence
Externí odkaz:
http://arxiv.org/abs/1211.2959
Autor:
He, Yanzhang, Bao, Chengguang
The response of spin-2 small condensates to an external magnetic field $B$ is studied. The parameters of the interaction are considered as variable. The emphasis is placed on clarifying the modes of excitation caused by the quadratic Zeeman term. The
Externí odkaz:
http://arxiv.org/abs/1112.3724
Autor:
Bao, Chengguang
It was found that stable few-body spin-structures, pairs and triplexes, may exist as basic constituents in small spin-3 condensates, and they will play the role as building blocks when the parameters of interaction are appropriate. Specific method is
Externí odkaz:
http://arxiv.org/abs/1112.3722
Autor:
Bao, Chengguang
The spin structures of small spin-1 condensates ($N\leq 1000$) under a magnetic field $B$ has been studied beyond the mean field theory (MFT). Instead of the spinors, the many body spin-eigenstates have been obtained. We have defined and calculated t
Externí odkaz:
http://arxiv.org/abs/1112.2826
Autor:
Bao, Chengguang
A model of a device is proposed and related theoretical calculation is performed to study the weak interactions among neutral atoms and molecules. In this model 3-body collisions among the neutral particles occur repeatedly in a trap. Results of calc
Externí odkaz:
http://arxiv.org/abs/1001.2352
Autor:
He, Yanzhang, Bao, Chengguang
Two-body scattering of neutral particles in a trap is studied theoretically. The control of the initial state is realized by using optical traps. The collisions inside the trap occur repeatedly; thereby the effect of interaction can be accumulated. T
Externí odkaz:
http://arxiv.org/abs/1001.1467