On the Present Difficulties and Recent Advances in Quantum Mechanics

Armendariz Gustavo P, Jorge Cravioto-Lagos, Víctor Velázquez +3 more

The Hong-Ou-Mandel interferometer is an optical device which allows us to prove experimentally the quantum nature of light via the quantum amplitude superposition of two indistinguishable photons. We have implemented this experiment as an advanced undergraduate laboratory experience. We were able to overcome well known difficulties with this experiment using recently reported techniques by Thomas et al. [Rev. Sci. Instr. 80, 036101 (2009), ].

H. T. Flint

Y. Nambu

Emily Marshman, Chandralekha Singh

Dirac notation is used commonly in quantum mechanics.However, many upper-level undergraduate and graduate students in physics have difficulties with representations of quantum operators corresponding to observables especially when using Dirac notation.To investigate these difficulties, we administered free-response and multiple-choice questions and conducted individual interviews with students in advanced quantum mechanics courses.We discuss the analysis of data on the common difficulties found. I.

Michael Drieschner

Ramakrishna Kolikipogu

The quantum Key Distribution (QKD) is a cryptographical approach that practices quantum mechanical properties to make entirely secured keys for safe message transmission among multiple users. Substantial advancement has been acquiring QKD models and specifications in recent years. This article systematically examines QKD models involving the diverse QKD standards, advantages, difficulties, constraints, and encounters. The article finishes with the potential scope of QKD and its probable applications.