One of the cornerstones of inflationary cosmology is that primordial density fluctuations have a quantum mechanical origin. However, most physicists consider that such quantum mechanical effects disappear in CMB data due to decoherence. In this conference report, we show that the violation of Bell inequalities in an initial state of our universe increases exponentially with the number of modes ...

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We consider a two-parameter nonhermitean quantum-mechanical Hamiltonian operator that is invariant under the combined effects of parity and time reversal transformations. Numerical investigation shows that for some values of the potential parameters the Hamiltonian operator supports real eigenvalues and localized eigenfunctions. In contrast with other PT symmetric models which require special i...

The method of coherent control allows one to exploit classical and quantum-mechanical interferences to control the dynamics of atomic, molecular, and solid-state systems, and to drive them into novel, non-equilibrium states. This technique has been widely applied to control both electronic and vibrational degrees of freedom in a variety of systems. Typically, a sequence of femtosecond pulses ex...

Electrochemical electron transfer reactions are reviewed, starting with the works of Marcus and Hush, who evolved the concept of solvent reorganization. The resulting equations for the electrochemical rate constants are derived, and interpreted within the Gerischer formulation. A quantum mechanical version points out the importance of the electronic interaction between reactant and electrode, a...

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Quantum mechanical basis for the Geiger-Nuttal Law. Determination of the half-lives of several species in the Uranium, Thorium and Actinium series through the use of a scintillator, solid-state detector and coincidence circuitry. The half-lives of Po, Rn and Po are determined at 181 ± 5 s, 4.49 ± .01 days and 163 ± 1 μs, respectively. Verification of the theoretical relationship between half-li...

Quantum mechanical simulation is an invaluable tool for studying material properties and behaviors due to its versatility and ability to probe properties not easily accessible in experiments. Employing the computational power of high performance HPCMP supercomputers, we investigated the oxidation states of ions in insulating solids, the stabilization of highly-polar PbTiO3 films, and defects in...

We report on the fabrication and investigation of the plasmon excitations in laterally confined quasi-two-dimensional (2D) Ag nanodisks on a Si(111) substrate. Different from the Mie resonance in Ag clusters and the propagating plasmon waves in 2D systems, these ultrathin nanodisks exhibit a low-energy plasmon resonance whose frequency is continuously tunable by the disk diameter. Quantum-mecha...