1,541 research outputs found
A versatile high resolution objective for imaging quantum gases
We present a high resolution objective lens made entirely from catalog
singlets that has a numerical aperture of 0.36. It corrects for aberrations
introduced by a glass window and has a long working distance of 35mm, making it
suitable for imaging objects within a vacuum system. This offers simple high
resolution imaging for many in the quantum gas community. The objective
achieves a resolution of 1.3{\mu}m at the design wavelength of 780nm, and a
diffraction-limited field of view of 360{\mu}m when imaging through a 5mm
window. Images of a resolution target and a pinhole show quantitative agreement
with the simulated lens performance. The objective is suitable for
diffraction-limited imaging on the D2 line of all the alkalis by changing only
the aperture diameter, retaining numerical apertures above 0.32. The design
corrects for window thicknesses of up to 15mm if the singlet spacings are
modified
Precise wavefunction engineering with magnetic resonance
Controlling quantum fluids at their fundamental length scale will yield
superlative quantum simulators, precision sensors, and spintronic devices. This
scale is typically below the optical diffraction limit, precluding precise
wavefunction engineering using optical potentials alone. We present a protocol
to rapidly control the phase and density of a quantum fluid down to the healing
length scale using strong time-dependent coupling between internal states of
the fluid in a magnetic field gradient. We demonstrate this protocol by
simulating the creation of a single stationary soliton and double soliton
states in a Bose-Einstein condensate with control over the individual soliton
positions and trajectories, using experimentally feasible parameters. Such
states are yet to be realized experimentally, and are a path towards
engineering soliton gases and exotic topological excitations.Comment: 8+ pages, 3 figures; revised parameters and added section about
optimisation of adiabatic, finite-duration pulses and analytic resolution
limi
Empowerment or Engagement? Digital Health Technologies for Mental Healthcare
We argue that while digital health technologies (e.g. artificial intelligence, smartphones, and virtual reality) present significant opportunities for improving the delivery of healthcare, key concepts that are used to evaluate and understand their impact can obscure significant ethical issues related to patient engagement and experience. Specifically, we focus on the concept of empowerment and ask whether it is adequate for addressing some significant ethical concerns that relate to digital health technologies for mental healthcare. We frame these concerns using five key ethical principles for AI ethics (i.e. autonomy, beneficence, non-maleficence, justice, and explicability), which have their roots in the bioethical literature, in order to critically evaluate the role that digital health technologies will have in the future of digital healthcare
Проблема правової культури в історії філософсько-педагогічної думки
(uk) Стаття присвячена проблемі правової культури в історії філософсько-педагогічної думки
Going places
Journeys. We all make them. Often they take us to exotic places. Sometimes they take us even further. They might take us through time. Or they might take us into a new way of life. There are times too, when we go all over the world and back again only to find that home is, after all, where it’s all happening.
This book contains stories about many different types of journey. We hope you will enjoy travelling into it and finding a world that suits you
Analysis of an Electromagnetic Mitigation Scheme for Reentry Telemetry Through Plasma
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76726/1/AIAA-37395-105.pd
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