Spin-Orbit Coupling Fluctuations as a Mechanism of Spin Decoherence

We discuss a general framework to address spin decoherence resulting from fluctuations in a spin Hamiltonian. We performed a systematic study on spin decoherence in the compound K$_6$[V$_{15}$As$_6$O$_{42}$(D$_2$O)] $\cdot$ 8D$_2$O, using high-field Electron Spin Resonance (ESR). By analyzing the anisotropy of resonance linewidths as a function of orientation, temperature and field, we find that the spin-orbit term is a major decoherence source. The demonstrated mechanism can alter the lifetime of any spin qubit and we discuss how to mitigate it by sample design and field orientation.Comment: submitte

Automated data acquisition and reduction system for torsional braid analyzer

Automated Data Acquisition and Reduction System (ADAR) evaluates damping coefficient and relative rigidity by storing four successive peaks of waveform and time period between two successive peaks. Damping coefficient and relative rigidity are then calculated and plotted against temperature or time in real time

Dispersion strenghthening of metals Progress report, Sep. 1965 - Feb. 1966

Apparatus constructed for controlled oxidation of iron-beryllium alloy powder

Some aspects of environmental physiology of raft grown mussels

Mussels (P viridis L) from marine intertidal region, when transplanted and grown under constant submergence in estuarine environment (on a floating raft) display a wide array of physi~logical adapt ions in osmoregulation, growth and annual reproduction cycle

Quantum Electronic Transport through a Precessing Spin

The conductance through a local nuclear spin precessing in a magnetic field is studied by using the equations-of-motion approach. The characteristics of the conductance is determined by the tunneling matrix and the position of equilibrium chemical potential. We find that the spin flip coupling between the electrons on the spin site and the leads produces the conductance oscillation. When the spin is precessing in the magnetic field at Larmor frequency ($\omega_{L}$), the conductance develops the oscillation with the frequency of both $\omega_{L}$ and 2$\omega_{L}$ components, the relative spectrum weight of which can be tuned by the chemical potential and the spin flip coupling.Comment: 5 pages, 3 figure

Improving Contact Tracing in Minority Communities by Combating Misinformation and Distrust

The COVID-19 pandemic continues to challenge the global population as infection rates climb, and officials struggle to balance the need to slow the spread of COVID-19 but also open economies safely. The disproportionate impact of COVID-19 on minority communities has raised questions about the unique experiences of these communities in terms of not only becoming infected with COVID-19, but also mitigating its spread. Although contact tracing has been identified as an invaluable tool for managing community spread and supporting economic reopening, this is contingent, in part, upon compliance with contact tracer requests. In this study, we investigated how misinformation and distrust might influence intentions to comply with contact tracer requests among a sample of self-identified minority New Yorkers. Results showed that intentions to comply with contact tracing requests was directly related to knowledge about contact tracing, trust in contact tracers, trust in healthcare professionals, and self-identified political liberalism. Results also showed that increased intentions to comply with contact tracers was indirectly influenced by trust in healthcare professionals, trust in government healthcare officials, and trust in news media via increased trust in contact tracers, and health literacy and political liberalism through increased knowledge of contact tracing. These findings inform four policy recommendations for improving contact tracing compliance among minority individuals by combating misinformation and distrust

Anomalous frequency and intensity scaling of collective and local modes in a coupled spin tetrahedron system

We report on the magnetic excitation spectrum of the coupled spin tetrahedral system Cu$_{2}$Te$_{2}$O$_{5}$Cl$_{2}$ using Raman scattering on single crystals. The transition to an ordered state at T$_{N}^{Cl}$=18.2 K evidenced from thermodynamic data leads to the evolution of distinct low-energy magnetic excitations superimposed by a broad maximum. These modes are ascribed to magnons with different degree of localization and a two-magnon continuum. Two of the modes develop a substantial energy shift with decreasing temperature similar to the order parameter of other Neel ordered systems. The other two modes show only a negligible temperature dependence and dissolve above the ordering temperature in a continuum of excitations at finite energies. These observations point to a delicate interplay of magnetic inter- and intra-tetrahedra degrees of freedom and an importance of singlet fluctuations in describing a spin dynamics.Comment: 7pages, 6figures, 1tabl