Quantum computing with alkaline earth atoms

We present a complete scheme for quantum information processing using the unique features of alkaline earth atoms. We show how two completely independent lattices can be formed for the $^1$S$_0$ and $^3$P$_0$ states, with one used as a storage lattice for qubits encoded on the nuclear spin, and the other as a transport lattice to move qubits and perform gate operations. We discuss how the $^3$P$_2$ level can be used for addressing of individual qubits, and how collisional losses from metastable states can be used to perform gates via a lossy blockade mechanism.Comment: 4 pages, 3 figures, RevTeX

On the Mahler measure of 1+X+1/X+Y+1/Y1+X+1/X+Y+1/Y

We prove a conjectured formula relating the Mahler measure of the Laurent polynomial $1+X+X^{-1}+Y+Y^{-1}$, to the $L$-series of a conductor 15 elliptic curve.Comment: 18 pages, Fixed typos in Lemmas 3 and

Bound states in weakly deformed waveguides: numerical vs analytical results

We have studied the emergence of bound states in weakly deformed and/or heterogeneous waveguides, comparing the analytical predictions obtained using a recently developed perturbative method, with precise numerical results, for different configurations (a homogeneous asymmetric waveguide, a heterogenous asymmetric waveguide and a homogeneous broken-strip). In all the examples considered in this paper we have found excellent agreement between analytical and numerical results, thus providing a numerical verification of the analytical approach.Comment: 11 pages, 6 figure

Modeling of heat transfer attenuation by ablative gases during the Stardust re-entry

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/97141/1/AIAA2012-814.pd

Divergence of an orbital-angular-momentum-carrying beam upon propagation

There is recent interest in the use of light beams carrying orbital angular momentum (OAM) for creating multiple channels within free-space optical communication systems. One limiting issue is that, for a given beam size at the transmitter, the beam divergence angle increases with increasing OAM, thus requiring a larger aperture at the receiving optical system if the efficiency of detection is to be maintained. Confusion exists as to whether this divergence scales linarly with, or with the square root of, the beam's OAM. We clarify how both these scaling laws are valid, depending upon whether it is the radius of the Gaussian beam waist or the rms intensity which is kept constant while varying the OAM.Comment: 4 pages, 2 figure

CFD Implementation of a novel carbon-phenolic-in-air chemistry model for atmospheric re-entry

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90646/1/AIAA-2011-143-915.pd

Sense of Community Responsibility at the Forefront of Crisis Management

The COVID-19 pandemic has made it clear that a sense of community responsibility is crucial to mitigate the effects of viral spread. Many citizens across the world have heeded the call to isolate and self-distance, yet large numbers of individuals do not seem to understand their responsibility for others. This article explores how a sense of community responsibility is born in community contexts, how various features of a crisis impact community responsibility, and how public administration plays a crucial role in facilitating mitigation and solutions to crisis. The article also explores the utility of the Community Experience Model in crisis management contexts, and sets the stage for further exploration of community experiences in disaster and crisis scholarship and practice