Results 41 to 50 of about 4,533,614 (299)

Polarization phase gate with a tripod atomic system [PDF]

open access: yes, 2003
We analyze the nonlinear optical response of a four-level atomic system driven into a tripod configuration. The large cross-Kerr nonlinearities that occurr in such a system are shown to produce nonlinear phase shift of order $\pi$.
A. B. Matsko   +10 more
core   +3 more sources

Atomic-level shifts in a squeezed vacuum [PDF]

open access: yesPhysical Review A, 1986
The energy-level shifts for a multilevel atom interacting with a squeezed vacuum are calculated. The level shifts are made up of two contributions: (i) the ordinary Lamb shift and (ii) a shift due to the squeezed-vacuum intensity spectrum (similar to the blackbody-radiation shifts).
openaire   +4 more sources

Measuring, Predicting and Visualizing Short-Term Change in Word Representation and Usage in VKontakte Social Network

open access: yes, 2017
Language in social media is extremely dynamic: new words emerge, trend and disappear, while the meaning of existing words can fluctuate over time. Such dynamics are especially notable during a period of crisis. This work addresses several important tasks
Arendt, Dustin   +3 more
core   +2 more sources

Active optical clock based on four-level quantum system [PDF]

open access: yes, 2012
Active optical clock, a new conception of atomic clock, has been proposed recently. In this report, we propose a scheme of active optical clock based on four-level quantum system.
A C Ji   +26 more
core   +2 more sources

Adherence to Protocol Recommendations for Children With Wilms Tumour in Two Consecutive Studies in the United Kingdom and Ireland—Does Variation Matter?

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background and Aims Wilms tumour (WT) has excellent event‐free and overall survival (OS). However, small differences exist between countries participating in the same international study. This led us to examine variation in adherence to protocol recommendations as a potential contributing factor.
Suzanne Tugnait   +23 more
wiley   +1 more source

Modified Gray-Level Coding Method for Absolute Phase Retrieval

open access: yesSensors, 2017
Fringe projection systems have been widely applied in three-dimensional (3D) shape measurements. One of the important issues is how to retrieve the absolute phase.
Xiangcheng Chen   +6 more
doaj   +1 more source

Interaction of an atom with layered dielectrics [PDF]

open access: yes, 2010
We determine the energy-level shift experienced by a neutral atom due the quantum electromagnetic interaction with a layered dielectric body. We use the technique of normal-mode expansion to quantize the electromagnetic field in the presence of a layered,
Eberlein, Claudia, Zietal, Robert
core   +2 more sources

Financial Burden Associated With Hospitalisation Among Families of Childhood Brain Tumours in Australia

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Families of children with cancer experience significant financial strain, even with universal healthcare. Indirect costs, such as productivity losses and non‐medical expenses, are rarely included in economic evaluations, and little is known about how effectively financial aid programmes alleviate this burden. Childhood brain tumours
Megumi Lim   +8 more
wiley   +1 more source

Defining Roles in Pediatric Palliative Care: Perspectives From Oncology and Palliative Care Teams

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Early integration of pediatric palliative care (PPC) is associated with improved symptom management, quality of life, and healthcare utilization for children with cancer. Despite this, variation persists in how PPC is understood, operationalized, and integrated within pediatric oncology programs. In particular, ambiguity surrounding
Leeat Granek   +13 more
wiley   +1 more source

Observables in Topological Yang-Mills Theories With Extended Shift Supersymmetry

open access: yes, 2005
We present a complete classification, at the classical level, of the observables of topological Yang-Mills theories with an extended shift supersymmetry of N generators, in any space-time dimension.
Baal   +17 more
core   +1 more source

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