Quantized Area of the Schwarzschild Black Hole: A non-Hermitian Perspective

TL;DR

This paper links the quantized area of Schwarzschild black holes to non-Hermitian quantum systems, deriving new expressions for Hawking temperature and entropy, and confirming the logarithmic correction term in the area spectrum.

Contribution

It introduces a novel approach connecting black hole horizon quantization to non-Hermitian quantum mechanics via a similarity transformation.

Findings

Quantization of black hole area in harmonic oscillator levels

Derived new expressions for Hawking temperature and entropy

Confirmed the logarithmic area correction term

Abstract

In this work, our aim is to link Bekenstein's quantized form of the area of the event horizon to the Hamiltonian of the non-Hermitian Swanson oscillator which is known to be $\mathbb{PT}$-symmetric. We achieve this by employing a similarity transformation that maps the non-Hermitian quantum system to a scaled harmonic oscillator. Our procedure is standard and well known. We, first of all, consider the unconstrained reduced Hamiltonian which is directly expressed in terms of the Schwarzschild mass and implies a periodic character for the conjugate momentum (which represents the asymptotic time coordinate), the period being the inverse Hawking temperature. This leads to the quantization of the event-horizon area in terms of the harmonic-oscillator levels. Within the framework of the Swanson oscillator, we proceed to derive novel expressions for the Hawking temperature and the black hole entropy. Notably, the logarithmic area-correction term -(1/2)$\ln$(area) is consistent with our results whereas -(3/2) $\ln$(area) is not.