翻訳と辞書 Words near each other ・ Q'umirqucha (Camanti) ・ Q'umirqucha (Canchis) ・ Q'umirqucha (Checacupe) ・ Q'umirqucha (Ocongate) ・ Q'umirqucha (Q'umir Qucha) ・ Q'umirqucha (Yanaq Qusqu K'uchu) ・ Q'uq'umatz ・ Q'urawiri ・ Q'uwa Laki ・ Q'Viva! The Chosen ・ Q*bert ・ Q+/Papias Hypothesis ・ Q+A ・ Q-analog ・ Q-analysis ・ Q-ball ・ Q-based narrowing ・ Q-Be ・ Q-Bessel polynomials ・ Q-Bond ・ Q-Bus ・ Q-carbon ・ Q-Cells ・ Q-CERT ・ Q-Charlier polynomials ・ Q-Chastic EP ・ Q-Chem ・ Q-Collection ・ Q-Connector ・ Q-construction Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Q-ball ： ウィキペディア英語版 Q-ball :''For the ball used in billiards, see cue ball.'' ''"Q ball" is also the name of the Q sensor module in the Apollo spacecraft launch escape system.'' ''"Q-Ball" is a colloquialism for quetiapine'' In theoretical physics, Q-ball refers to a type of non-topological soliton. A soliton is a localized field configuration that is stable—it cannot spread out and dissipate. In the case of a non-topological soliton, the stability is guaranteed by a conserved charge: the soliton has lower energy per unit charge than any other configuration. (In physics, charge is often represented by the letter "Q", and the soliton is spherically symmetric, hence the name.) == Intuitive explanation == A Q-ball arises in a theory of bosonic particles, when there is an attraction between the particles. Loosely speaking, the Q-ball is a finite-sized "blob" containing a large number of particles. The blob is stable against fission into smaller blobs, and against "evaporation" via emission of individual particles, because, due to the attractive interaction, the blob is the lowest-energy configuration of that number of particles. (This is analogous to the fact that Nickel-62 is the most stable nucleus because it is the most stable configuration of neutrons and protons. However, Nickel-62 is not a Q-ball, in part because neutrons and protons are fermions, not bosons.) For there to be a Q-ball, the number of particles must be conserved (i.e. the particle number is a conserved "charge", so the particles are described by a complex-valued field $\backslash phi$), and the interaction potential $V(\backslash phi)$ of the particles must have a negative (attractive) term. For non-interacting particles, the potential would be just a mass term $V\_(\backslash phi)=m^2|\backslash phi|^2$, and there would be no Q-ball. But if one adds an attractive $-\backslash lambda\; |\backslash phi|^4$ term (and positive higher powers of $\backslash phi$ to ensure that the potential has a lower bound) then there are values of $\backslash phi$ where 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Q-ball」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.