Spectrum of classical two-dimensional Coulomb clusters

被引：35
作者：
Nelissen, K
Matulis, A
Partoens, B
Kong, M
Peeters, FM
机构：
[1] Univ Antwerp, Dept Fys, B-2020 Antwerp, Belgium
[2] Inst Semicond Phys, LT-01108 Vilnius, Lithuania
[3] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China
来源：
PHYSICAL REVIEW E | 2006年 / 73卷 / 01期
关键词：
D O I：
10.1103/PhysRevE.73.016607
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The frequency spectrum of a system of classical charged particles interacting through a Coulomb repulsive potential and which are confined in a two-dimensional parabolic trap is studied. It is shown that, apart from the well-known center-of-mass and breathing modes, which are independent of the number of particles in the cluster, there are more "universal" modes whose frequencies depend only slightly on the number of particles. To understand these modes the spectrum of excitations as a function of the number of particles is compared with the spectrum obtained in the hydrodynamic approach. The modes are classified according to their averaged vorticity and it is shown that these "universal" modes have the smallest vorticity and follow the hydrodynamic behavior.
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页数：7
相关论文
共 27 条
[11]   Structure and correlations in two-dimensional classical artificial atoms confined by a Coulomb potential [J].
Ferreira, WP ;
Matulis, A ;
Farias, GA ;
Peeters, FM .
PHYSICAL REVIEW E, 2003, 67 (04) :8
[12]   Energy and symmetry of self-assembled two-dimensional dipole clusters in magnetic confinement [J].
Golosovsky, M ;
Saado, Y ;
Davidov, D .
PHYSICAL REVIEW E, 2002, 65 (06) :1-061405
[13]   Dynamic, self-assembled aggregates of magnetized, millimeter-sized objects rotating at the liquid-air interface: Macroscopic, two-dimensional classical artificial atoms and molecules [J].
Grzybowski, BA ;
Jiang, XY ;
Stone, HA ;
Whitesides, GM .
PHYSICAL REVIEW E, 2001, 64 (01) :12
[14]  
Jean M. S., 2001, EPL-EUROPHYS LETT, V55, P45
[15]   COMBINED SPIN-MASS VORTEX WITH SOLITON TAIL IN SUPERFLUID HE-3-B [J].
KONDO, Y ;
KORHONEN, JS ;
KRUSIUS, M ;
DMITRIEV, VV ;
THUNEBERG, EV ;
VOLOVIK, GE .
PHYSICAL REVIEW LETTERS, 1992, 68 (22) :3331-3334
[16]  
Kong M, 2002, PHYS REV E, V65, DOI 10.1103/PhysRevE.65.046602
[17]   Packings and defects of strongly coupled two-dimensional Coulomb clusters: Numerical simulation [J].
Lai, YJ ;
I, L .
PHYSICAL REVIEW E, 1999, 60 (04) :4743-4753
[18]   MACROSCOPIC ELECTRON DIMPLES ON THE SURFACE OF LIQUID-HELIUM [J].
LEIDERER, P ;
EBNER, W ;
SHIKIN, VB .
SURFACE SCIENCE, 1982, 113 (1-3) :405-411
[19]  
LEVI BG, 1988, PHYS TODAY, V41, P17, DOI [10.1063/1.2811312, 10.1063/1.2811659]
[20]   Mode spectra of thermally excited two-dimensional dust Coulomb clusters [J].
Melzer, A .
PHYSICAL REVIEW E, 2003, 67 (01) :10
123