American Journal of Modern Physics

Volume 9, Issue 5, September 2020

  • Dynamics of the Quantum Discord with Weak Measurement for a Two-atom System in Thermal Reservoirs

    Mei Bai, Hong Jia Xu, Xue Qun Yan

    Issue: Volume 9, Issue 5, September 2020
    Pages: 68-72
    Received: Sep. 23, 2020
    Accepted: Nov. 05, 2020
    Published: Nov. 11, 2020
    Abstract: Weak measurement is a kind of state partial collapse measurement developed on the basis of von Neumann measurement and positive operator value measurement, which allows us to explore the quantum world which has the least influence on the research system. Based on the weak measurement theory, the dynamics of quantum discord for two isolated atoms in... Show More
  • On the Justification and Validity of the Kennard Inequality

    Haengjin Choe

    Issue: Volume 9, Issue 5, September 2020
    Pages: 73-76
    Received: Nov. 05, 2020
    Accepted: Nov. 23, 2020
    Published: Dec. 04, 2020
    Abstract: In 1927, Earle Hesse Kennard derived an inequality describing Heisenberg’s uncertainty principle. Since then, we have traditionally been using the standard deviation as the measure of uncertainty in quantum mechanics. But Jan Hilgevoord asserts that the standard deviation is neither a natural nor a generally adequate measure of quantum uncertainty.... Show More