Pair production of Dirac particles in a $$d+1$$ d + 1 -dimensional noncommutative space–time
نویسندگان
چکیده
منابع مشابه
Microcausality of Dirac field on noncommutative spacetime
We study the microcausality of free Dirac field on noncommutative spacetime. We calculate the vacuum and non-vacuum state expectation values for the Moyal commutator [ψα(x) ⋆ ψβ(x), ψσ(x ) ⋆ ψτ (x )]⋆ of Dirac field on noncommutative spacetime. We find that they do not vanish for some cases of the indexes for an arbitrary spacelike interval, no matter whether θ = 0 or θ 6= 0. However for the ph...
متن کاملThe breakdown of microcausality of Dirac field on noncommutative spacetime
We analyze the microcausality of free Dirac field on noncommutative spacetime. We calculate the vacuum and non-vacuum state expectation values for the Moyal commutator [ψα(x) ⋆ ψβ(x), ψσ(x ) ⋆ ψτ (x )]⋆ of Dirac field on noncommutative spacetime. We find that they do not vanish for an arbitrary spacelike interval, no matter whether θ0i = 0 or θ0i 6= 0. Therefore microcausality is violated for D...
متن کاملExact solutions of Dirac equation on (1+1)-dimensional spacetime coupled to a static scalar field
We use a generalized scheme of supersymmetric quantum mechanics to obtain the energy spectrum and wave function for Dirac equation in (1+1)-dimensional spacetime coupled to a static scalar field. PACS: 03.65.Pm, 11.30.Pb e-mail: [email protected] e-mail: [email protected] 1
متن کاملin a static 1 + 1 dimensional spacetime
We show explicitly that there is particle creation in a static spacetime. This is done by studying the field in a coordinate system based on a physical principle which has recently been proposed. There the field is quantized by decomposing it into positive and negative frequency modes on a particular spacelike surface. This decomposition depends explicitly on the surface where the decomposition...
متن کاملStrings in Noncommutative Spacetime
Free bosonic strings in noncommutative spacetime are investigated. The string spectrum is obtained in terms of light-cone quantization. We construct two different models. In the first model the critical dimension is still required to be 26 while only extreme high energy spectrum is modified by noncommutative effect. In the second model, however, the critical dimension is reduced to be less than...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 2014
ISSN: 1434-6044,1434-6052
DOI: 10.1140/epjc/s10052-014-3165-z