The authors define q-extended versions of the iterated integrals and nested sums used in QFT, deriving closed forms for simple cases and algorithmic recipes for complex ones.
New version of pseudo-hermiticity in the two-sided deformation of Heisenberg algebra
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abstract
The recently introduced two- and three-parameter ($p,q$)- and ($p,q,\mu$)-deformed extensions of the Heisenberg algebra were explored under the condition of their connectedness with the respective nonstandard (other than known ones) deformed quantum oscillator algebras. In this paper we show that such connection dictates certain new $\eta(N)$-pseudo-Hermitian conjugation rule between the creation and annihilation operators, with $\eta(N)$ depending on the particle number operator $N$. In turn, that leads to the related $\eta(N)$-pseudo-Hermiticity of the position/momentum operators, though the involved Hamiltonian is Hermitian. Different possible cases are studied, and some interesting features implied by the use of such $\eta(N)$-based conjugation rule are emphasized.
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math-ph 1years
2026 1verdicts
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The $q$-extension of iterated integrals and nested sums in quantum field theory
The authors define q-extended versions of the iterated integrals and nested sums used in QFT, deriving closed forms for simple cases and algorithmic recipes for complex ones.