Bose-Einstein distribution

Japanese: ボース=アインシュタイン分布 - ボース=アインシュタインぶんぷ(英語表記)Bose-Einstein distribution
Bose-Einstein distribution
In a system of bosonics in thermal equilibrium at temperature T , with negligible interactions between particles, the probability that a particle is in a state of energy ε, or the average number of particles in this state, is given by

f (ε)=1/{ exp [(ε-μ)/ kT ]-1}

This distribution is called the Bose-Einstein distribution or Bose distribution. k is the Boltzmann constant, and μ is the chemical potential. For photons and phonons, particles are created and annihilated, so the total number of particles is not constant, so μ = 0. Planck's radiation formula is obtained by applying this distribution to photons. Furthermore, when the particle density is small and the temperature is high, this distribution approaches the Maxwell-Boltzmann distribution, and in the opposite case, it exhibits Bose-Einstein condensation.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:
温度 T で熱平衡状態にあるボソンの系において粒子間の相互作用が無視できるときに,粒子がエネルギー ε の状態にある確率,またはこの状態にある粒子の平均数は次式で与えられる。

f(ε)=1/{ exp [(ε-μ)/kT]-1}

この分布をボース=アインシュタイン分布またはボース分布という。 k はボルツマン定数,μ は化学ポテンシャルである。光子やフォノンは粒子が生成,消滅して全粒子数が一定でないので μ=0 になる。プランクの放射式はこの分布を光子に適用して得られる。また粒子密度が小さく,温度が高い場合にこの分布はマクスウェル=ボルツマン分布に近づき,その逆の場合はボース=アインシュタイン凝縮を示す。

出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報

<<:  Parameter - Bosuu

>>:  Bose-Einstein condensation

Recommend

Nihāya al-arab (English spelling)

…The representatives of this group are the three ...

New South Wales

A state in the southeast of Australia. It has an a...

Stiffness - stiffness

1. Muscles become stiff and the area feels heavy. ...

Hinomaki House

A manor in Uda County, Yamato Province (present-da...

Penny Post

…In 1659, he proposed the creation of a low-cost ...

Nakamura Teijo

Haiku poet. Born in Kumamoto City. Maiden name: S...

Treecreeper

A family of birds in the order Passeriformes. Incl...

Silo - Sairo (English spelling) silo

A silo is a structure in which high-moisture feed...

Bǎnulescu, Ş. (English spelling) BanulescuS

…Official name: Romania Area: 237,500 km2 Populat...

Ryugatake [town] - Ryugatake

A former town occupying the southeastern part of A...

Acetate rayon

…A fiber made from cellulose acetate, a semi-synt...

Mapania

…The most primitive Cyperaceae is the genus Scirp...

Chrotogale owstoni (English spelling) Chrotogaleowstoni

...Three species are found in the Malay Peninsula...

Oxycetonia jucunda (English spelling) Oxycetonia jucunda

...The larvae feed mainly on humus, and compared ...

control surface

…Automatic steering device [Masataka Fujino] [Air...