The Dirac oscillator in cloud-of-strings spacetime admits exact bound states whose energy spectrum is quantized by radial number n and angular number κ and depends explicitly on oscillator frequency ω, string-cloud parameter a, and curvature-modified effective mass m_eff.
Clouds of strings in general relativity
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Melnikov analysis shows charge is essential for chaos under temporal perturbations in Hayward black holes with string fluids while spatial perturbations always produce chaos, with Lyapunov exponents modulated by string density and regularization.
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The Dirac oscillator in the curved spacetime of a cloud of strings
The Dirac oscillator in cloud-of-strings spacetime admits exact bound states whose energy spectrum is quantized by radial number n and angular number κ and depends explicitly on oscillator frequency ω, string-cloud parameter a, and curvature-modified effective mass m_eff.
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A Note on Chaos in Hayward Black Holes with String Fluids
Melnikov analysis shows charge is essential for chaos under temporal perturbations in Hayward black holes with string fluids while spatial perturbations always produce chaos, with Lyapunov exponents modulated by string density and regularization.