3,406 research outputs found
Regulating Air Toxics in Rhode Island: Policy vs. Technical Decisions
Dr. Roqu6 recounts her work as a doctoral candidate at Brown in developing standards for the regulation of airborne carcinogens. Based in part on this experience, she argues that care needs be taken lest those who regulate Risk bury key policy decisions within a mass of often irrelevant technical details
Massive pericardial effusion caused by hypothyroidism.
Although mild pericardial effusion is a usual finding in patients with hypothyroidism, massive pericardial effusion or pericardial tamponade is rare and customarily related to severe hypothyroidism. The diagnosis of hypothyroidism should be considered in the differential of patients presenting with unexplained pericardial effusion, even when signs and symptoms of hypothyroidism are nonexistent.info:eu-repo/semantics/publishedVersio
Coherence properties of coupled optomechanical cavities
In this work we investigate an optomechanical system consisting of two
cavities coupled to the same mechanical resonator. We consider each cavity
being weakly pumped as well as a small tunneling rate between the cavities. In
such conditions, the system can be studied via quantum Langevin equations and
the steady state solution can be found perturbatively. In order to ensure that
the approximations and methods used to study the system are suitable, the
analytical results were compared to numerical simulations. We study the
statistical properties of the cavity radiation fields and we show that
depending on the values of the parameters of the system, it is possible to
modify the spectrum of the cavities and even enhance the sub-Poissonian
character of the cavity field.Comment: 8 pages, 6 figure
Engineering Fast High-Fidelity Quantum Operations With Constrained Interactions
Understanding how to tailor quantum dynamics to achieve a desired evolution is a crucial problemin almost all quantum technologies. We present a very general method for designing high-efficiencycontrol sequences that are always fully compatible with experimental constraints on available inter-actions and their tunability. Our approach reduces in the end to finding control fields by solvinga set of time-independent linear equations. We illustrate our method by applying it to a numberof physically-relevant problems: the strong-driving limit of a two-level system, fast squeezing in aparametrically driven cavity, the leakage problem in transmon qubit gates, and the acceleration ofSNAP gates in a qubit-cavity system
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