quasiparticle

Japanese: quasiparticle
quasiparticle

…The excited state of a macroscopic object consisting of many interacting particles can be regarded as a collection of certain particles, and these particles are called elementary excitations. Although they are called particles, they are different from particles in a vacuum, and are virtual particles that incorporate the effects of interactions, and in this sense they are also called quasiparticles. There is a certain dispersion relationship w = w ( q ) between the momentum q and energy w of elementary excitations, and like ordinary particles, they are quantized according to Fermi statistics or Bose statistics. …

*Some of the terminology explanations that mention "quasiparticle" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…相互作用している多数の粒子よりなる巨視的物体の励起状態は,ある種の粒子の集りとみなすことができるが,この粒子を素励起という。粒子といっても真空中の粒子とは異なり,相互作用の効果をとり入れたいわば仮想的な粒子であって,この意味で準粒子quasiparticleとも呼ばれる。素励起のもつ運動量qとエネルギーwの間に一定の分散関係ww(q)があり,通常の粒子と同様,フェルミ統計,あるいはボース統計に従い量子化される。…

※「quasiparticle」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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