Scalable stable comb-to-tone integrated RF photonic drive for superconducting qubits.

The recent advent of quantum computing has the potential to overhaul security, communications, and scientific modeling. Superconducting qubits are a leading platform that is advancing noise-tolerant intermediate-scale quantum processors. The implementation requires scaling to large numbers of superconducting qubits, circuit depths, and gate speeds, wherein high-purity RF signal generation and effective cabling transport are desirable.

Real-time jitter correction in a photonic analog-to-digital converter.

A real-time jitter meter is used to measure and digitally sample the pulse-to-pulse timing error in a laser pulse train. The jitter meter is self-referenced using a single-pulse delay line interferometer and measures timing jitter using optical heterodyne detection between two frequency channels of the pulse train. Jitter sensitivity down to 3×10/ at 500 MHz has been demonstrated with a pulse-to-pulse noise floor of 1.

Analog optical computing primitives in silicon photonics.

Optical computing accelerators help alleviate bandwidth and power consumption bottlenecks in electronics. We show an approach to implementing logarithmic-type analog co-processors in silicon photonics and use it to perform the exponentiation operation and the recovery of a signal in the presence of multiplicative distortion. The function is realized by exploiting nonlinear-absorption-enhanced Raman amplification saturation in a silicon waveguide.

The slow pace of interactive video telemedicine adoption: the perspective of telemedicine program administrators on physician participation.

We conducted semistructured interviews with telemedicine program administrators as part of a national survey of physicians and managers regarding attitudes toward, and knowledge of, telemedicine. Telemedicine administrators were interviewed regarding factors affecting physician adoption of interactive video (IAV) telemedicine. The seven networks with which these managers were affiliated represented "traditional" telemedicine programs, primarily providing specialty teleconsultation via IAV.

Specialist physicians' knowledge and beliefs about telemedicine: a comparison of users and nonusers of the technology.

Telemedicine as a technology has been available for nearly 50 years, but its diffusion has been slower than many had anticipated. Even efforts to reimburse providers for interactive video (IAV) telemedicine services have had a limited effect on rates of participation. The resulting low volume of services provided (and consequent paucity of research subjects) makes the phenomenon difficult to study.