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20192026
most citedQuantisation of Klein-Gordon field in space-time: deformed oscillators and Unruh effect

10 citations · 48 across the 16 of their papers we have counts for

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hep-th2025

Thermal Casimir effect in -Minkowski space-time

Suman Kumar Panja, Vishnu Rajagopal

We study the finite temperature Casimir effect for parallel plates in the -Minkowski space-time. Using the Matsubara formalism and imposing the Dirichlet boundary conditions on…

hep-th2025

Search for possible signals of space-time non-commutativity from ACT DR6

Vishnu Rajagopal, Puxun Wu

The non-commutative geometry offers an effective framework for describing physics at the Planck scale, incorporating generic quantum-gravitational effects through an intrinsic mini…

hep-th2023★ 3 cited

-deformed power spectrum and modified Unruh temperature

Vishnu Rajagopal

We study the power spectrum of the uniformly accelerating scalar field, obeying the -deformed Klein-Gordon equation. From this we obtain the -deformed corrections to the Unru…

hep-th2022★ 5 cited

Maximal acceleration in a Lorentz invariant non-commutative space-time

E. Harikumar, Suman Kumar Panja, Vishnu Rajagopal

In this paper, we derive the non-commutative corrections to the maximal acceleration in the Doplicher-Fredenhagen-Roberts (DFR) space-time and show that the effect of the non-commu…

hep-th2021★ 2 cited

Quantisation of Lorentz invariant scalar field theory in non-commutative space-time and its consequence

E. Harikumar, Vishnu Rajagopal

Quantisation of Lorentz invariant scalar field theory in Doplicher-Fredenhagen-Roberts (DFR) space-time, a Lorentz invariant, non-commutative space-time is studied. Absence of a un…

hep-th2020★ 5 cited

Emergence of maximal acceleration from non-commutativity of space-time

E. Harikumar, Leela Ganesh Chandra Lakkaraju, Vishnu Rajagopal

In this paper, we show that the causally connected -dimensional line element of the -deformed Minkowski space-time induces an upper cut-off on the proper acceleration and der…

hep-th2020★ 2 cited

Quantisation of -deformed Dirac equation

E. Harikumar, Vishnu Rajagopal

In this paper, we study the quantisation of Dirac field theory in the -deformed space-time. We adopt a quantisation method that uses only equations of motion for quantising the…

hep-th2019★ 5 cited

Maximal acceleration in non-commutative space-time and its implications

E. Harikumar, Vishnu Rajagopal

In this paper, we derive the non-commutative corrections to the maximal acceleration of a massive particle. Using the eight-dimensional kappa-deformed phase-space metric, we obtain…

hep-th2019★ 10 cited

Time-space noncommutativity and Casimir effect

E. Harikumar, Suman Kumar Panja, Vishnu Rajagopal

We show that the Casimir force and energy are modified in the kappa-deformed space-time. This is analysed by solving the Green's function corresponding to kappa-deformed scalar fie…

hep-th2019★ 10 cited

Quantisation of Klein-Gordon field in space-time: deformed oscillators and Unruh effect

E. Harikumar, Vishnu Rajagopal

In this paper we study the quantisation of scalar field theory in -deformed space-time. Using a quantisation scheme that use only field equations, we derive the quantisation rul…