IOSR-JAP   Volume-17 ~ Issue-3 ~ May – Jun. 2025

ABSTRACT: Glaucoma is an irreversible eye problem that leads to vision loss. It is divided into two main different types, which are open-angle glaucoma (OAG) and angle-closure glaucoma (ACG). This study aims to evaluate selective laser trabeculoplasty (SLT) and argon laser trabeculoplasty (ALT) for treating OAG. The investigation took place in the COMSOL Multiphysics simulation environment. The eye’s anterior chamber was modeled, and the two LASERs were exposed through Schlemm’s canal and trabecular meshwork, which are part of the eye’s anterior chamber. The thermal responses of the eye due to the absorption of the electromagnetic energy carried by the two LASERs were measured.......

Keywords: Eye’s anterior chamber, Schlemm’s canal, trabecular meshwork, laser trabeculoplasty

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ABSTRACT: In this article, the authors start with a discussion of various quantum states and their associated density matrices. The evaluation of the density matrices for pure, mixed, and entangled states is done elaborately. The concept of the trace of the density matrices is then explored and its relation with the purity of any state is discussed. The mathematical process of diagonalization of a matrix is studied for pure, mixed, and entangled states.

Keywords: Quantum states; Pure state; Mixed states; Entangled states; Density matrix; Purity of state

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[2]. Bell, J.S.: On the einstein podolsky rosen paradox. Phys. Phys. Fiz. 1, 195 (1964)
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[5]. Luo, S., Sun, Y.: Quantum coherence versus quantum uncertainty. Phys. Rev. A. 96, 22130 (2017)

ABSTRACT: While coherence is an intrinsic characteristic of quantum systems, de-coherence describes the environmental intrusion during the measurement process, leading to transition from quantum to classical reality, hence playing a pivotal role in quantum information processing. The authors emphasize the need to understand physical aspect of various elements of the density matrix of a quantum state and how these elements control the coherence/de-coherence behaviour of quantum physics and the transition to classical domain.

Keywords: Quantum states; Density matrix; Coherence; de-coherence; measurement; Environment

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