State Regulation of Trucking: The Policy Impact of Differential Speed Limits

Includes bibliographical reference

Early Voting in Tennessee: Removing Barriers to Participation

In 1994. the Tennessee General Assembly mandated a new early voting system that allowed voters to cast a ballot in a two-week period prior to any election. Unlike absentee balloting, which requires registrants to justify why they cannot participate on election day, early voting is available to any registered voter who chooses to do so. By enacting early voting in Tennessee, the state legislature hoped to achieve increased turnout and easier access for citizens unable to vote at a regular polling site on election day. The purpose of this chapter is to ascertain whether the program was able to increase access for senior citizens and other citizens disadvantaged by a single election day voting period. Using county level-census data and voting returns from the 1996 election in Tennessee, we examine early voting participation by different socioeconomic groups

Implementation of Early Voting

We examine the early voting process in Tennessee during the election of 1994. By conducting a mail survey of all 95 county registrars, we ascertained the methods and costs of early voting implementation. Generally, the survey reveals a strong belief that early voting encourages greater participation by voters, with turnout data supporting this belief. We find that the ballot type and location of early voting sites play an important role in determining both the costs of early voting and the rate of voter participation

Turnout and Partisanship in Tennessee Elections

To understand the forces shaping current Tennessee politics, we discuss two fundamental concepts of Tennessee\u27s electoral system: voting turnout and partisanship. These two concepts are easily illustrated by two questions. First, how many people participate in elections in the state? Second, whom do Tennesseans elect to represent them? While we use a historical perspective to inform the analysis, we are generally more interested in the forces shaping politics in Tennessee today

State tomography of capacitively shunted phase qubits with high fidelity

We introduce a new design concept for superconducting quantum bits (qubits) in which we explicitly separate the capacitive element from the Josephson tunnel junction for improved qubit performance. The number of two-level systems (TLS) that couple to the qubit is thereby reduced by an order of magnitude and the measurement fidelity improves to 90%. This improved design enables the first demonstration of quantum state tomography with superconducting qubits using single shot measurements.Comment: submitted to PR

From the margins to the mainstream: deconstructing science communication as a white, Western paradigm

In this commentary we are concerned with what mainstream science communication has neglected through cultural narrowness and ambient racism: other practitioners, missing audiences, unvalued knowledge, unrecognised practices. We explore examples from First Nations Peoples in the lands now known as Australia, from Griots in West Africa and from People's Science Movements in India to help us reimagine science communication. To develop meaningfully inclusive approaches to science communication, we argue there is an urgent need for the ‘mainstream’ to recognise, value and learn from science communication practices that are all too often seen as at ‘the margins’ of this field

Microwave Dielectric Loss at Single Photon Energies and milliKelvin Temperatures

The microwave performance of amorphous dielectric materials at very low temperatures and very low excitation strengths displays significant excess loss. Here, we present the loss tangents of some common amorphous and crystalline dielectrics, measured at low temperatures (T < 100 mK) with near single-photon excitation energies, using both coplanar waveguide (CPW) and lumped LC resonators. The loss can be understood using a two-level state (TLS) defect model. A circuit analysis of the half-wavelength resonators we used is outlined, and the energy dissipation of such a resonator on a multilayered dielectric substrate is considered theoretically.Comment: 4 pages, 3 figures, submitted to Applied Physics Letter

Generation of Three-Qubit Entangled States using Superconducting Phase Qubits

Entanglement is one of the key resources required for quantum computation, so experimentally creating and measuring entangled states is of crucial importance in the various physical implementations of a quantum computer. In superconducting qubits, two-qubit entangled states have been demonstrated and used to show violations of Bell's Inequality and to implement simple quantum algorithms. Unlike the two-qubit case, however, where all maximally-entangled two-qubit states are equivalent up to local changes of basis, three qubits can be entangled in two fundamentally different ways, typified by the states $|\mathrm{GHZ}> = (|000> + |111>)/\sqrt{2}$ and $|\mathrm{W}> = (|001> + |010> + |100>)/\sqrt{3}$. Here we demonstrate the operation of three coupled superconducting phase qubits and use them to create and measure $|\mathrm{GHZ}>$ and $|\mathrm{W}>$ states. The states are fully characterized using quantum state tomography and are shown to satisfy entanglement witnesses, confirming that they are indeed examples of three-qubit entanglement and are not separable into mixtures of two-qubit entanglement.Comment: 9 pages, 5 figures. Version 2: added supplementary information and fixed image distortion in Figure 2