Though the marketing literature offers an abundance of research on the topics of perceived risk, information search, and purchase intentions, very few researchers have empirically examined these constructs in the context of services. This research explores the linkages among these three constructs when services are classified on the basis of search, experience, and credence attributes. Specific hypotheses are developed and tested. The results of this study indicate that perceived risk increases along a continuum from search to experience to credence service purchases. Other hypotheses relating to information search length, information sources, behavioral intentions, and service attributes, received moderate support. Finally, managerial implications of the study were provided, along with directions for future research.

We present Rabi oscillation measurements of a Nb/AlOx/Nb dc superconducting quantum interference device (SQUID) phase qubit with a 100 um^2 area junction acquired over a range of microwave drive power and frequency detuning. Given the slightly anharmonic level structure of the device, several excited states play an important role in the qubit dynamics, particularly at high power. To investigate the effects of these levels, multiphoton Rabi oscillations were monitored by measuring the tunneling escape rate of the device to the voltage state, which is particularly sensitive to excited state population. We compare the observed oscillation frequencies with a simplified model constructed from the full phase qubit Hamiltonian and also compare time-dependent escape rate measurements with a more complete density-matrix simulation. Good quantitative agreement is found between the data and simulations, allowing us to identify a shift in resonance (analogous to the ac Stark effect), a suppression of the Rabi frequency, and leakage to the higher excited states.Comment: 14 pages, 9 figures; minor corrections, updated reference

We analyze the behavior of a dc Superconducting Quantum Interference Device (SQUID) phase qubit in which one junction acts as a phase qubit and the rest of the device provides isolation from dissipation and noise in the bias leads. Ignoring dissipation, we find the two-dimensional Hamiltonian of the system and use numerical methods and a cubic approximation to solve Schrödinger's equation for the eigenstates, energy levels, tunneling rates, and expectation value of the currents in the junctions.Using these results, we investigate how well this design provides isolation while preserving the characteristics of a phase qubit. In addition, we show that the expectation value of current flowing through the isolation junction depends on the state of the qubit and can be used for non-destructive read out of the qubit state.