Results 41 to 50 of about 13,806,723 (180)

Dicke time crystals in driven-dissipative quantum many-body systems

New Journal of Physics, 2019
The Dicke model—a paradigmatic example of superradiance in quantum optics—describes an ensemble of atoms which are collectively coupled to a leaky cavity mode. As a result of the cooperative nature of these interactions, the system’s dynamics is captured
Bihui Zhu, Jamir Marino, Norman Y Yao, Mikhail D Lukin, Eugene A Demler   +4 more
doaj   +1 more source

Superabsorption of light via quantum engineering [PDF]

, 2014
Almost 60 years ago Dicke introduced the term superradiance to describe a signature quantum effect: N atoms can collectively emit light at a rate proportional to N-2.
Benjamin, SC, Milburn, G. J., Lovett, B. W., Higgins, K. D. B., Gauger, E. M., Stace, TM, Milburn, GJ, Stace, T. M., Higgins, K.D.B., Gauger, E.M., Benjamin, S. C., Gauger, E. M.; id_orcid, Benjamin, Simon, Benjamin, S.C., Milburn, G.J., Higgins, KDB, Lovett, Brendon William, Stace, T.M., Lovett, BW, Gauger, EM   +19 more
core   +1 more source

Hierarchische Membran zur photoelektrostatisch gesteuerten Trennung ein‐ und zweiwertiger Ionen

Angewandte Chemie, EarlyView.
Wir berichten über eine hierarchische, auf anodischem Aluminiumoxid getragene Poly(ionische Flüssigkeit)‐Kohlenstoffnitrid‐Membran zur effizienten Trennung ein‐ und zweiwertiger Ionen. Räumlich begrenzte Nanokanäle und gezielt eingestellte Ion‐Grenzflächen‐Wechselwirkungen ermöglichen außergewöhnlich hohe K+/Mg2+‐ (>500) und Li+/Mg2+‐Selektivitäten ...
Enis Oğuzhan Eren, Xuesong Xie, Zhi Li, Paolo Giusto   +3 more
wiley   +1 more source

Strukturelle und chemische Dynamik von Cu/NiO/Cu(100)‐Oberflächen während der CO2‐Hydrierung

Angewandte Chemie, EarlyView.
Dynamische Segregation als Designprinzip für Cu–Ni‐Katalysatoren. Operando‐LEEM/XPEEM verfolgt Reduktions‐, Umstrukturierungs‐ und Oberflächensegregationsprozesse in Cu‐verkapselten NiO‐Inseln auf Cu(100) während der CO2‐Hydrierung. ZUSAMMENFASSUNG Das Verständnis der dynamischen Umstrukturierung bimetallischer Katalysatoren unter Reaktionsbedingungen ...
Mauricio J. Prieto, Hao Wan, Liviu C. Tănase, Lucas de Souza Caldas, Aarti Tiwari, Karsten Reuter, Hendrik H. Heenen, Vanessa J. Bukas, Thomas Schmidt, Beatriz Roldan Cuenya   +9 more
wiley   +1 more source

Exact solution for the inhomogeneous Dicke model in the canonical ensemble: Thermodynamical limit and finite-size corrections

Nuclear Physics B, 2017
We consider an exactly solvable inhomogeneous Dicke model which describes an interaction between a disordered ensemble of two-level systems with single mode boson field.
W.V. Pogosov, D.S. Shapiro, L.V. Bork, A.I. Onishchenko   +3 more
doaj   +1 more source

The ecology of inclusive education reimagined: A framework for research, policy, and practice

British Educational Research Journal, EarlyView.
Abstract Evidence suggests the educational gap between those who experience success at school and those who do not is growing. Decades of rhetoric, policy and reform have failed to deliver an inclusive form of schooling that meets the learning needs of all students and much of the blame for this is placed at the feet of schools.
Joanna Anderson
wiley   +1 more source

Beyond a Technocentric Transition: A Diverse Economies Perspective for Social Justice in Circular Economy Business Models

Business Strategy and the Environment, EarlyView.
ABSTRACT The circular economy, dominated by capitalocentric, technocentric, and eco‐modernist discourses, risks perpetuating systemic injustice because of its limited consideration of the social and of what is possible. In this article, we examine how social justice can be embedded into circular business models (CBMs)—key drivers of the circular ...
Fernando C. Lit, Erik Paredis, Josephina C. C. M. Huijben, Myriam M. A. H. Cloodt   +3 more
wiley   +1 more source

Brans-Dicke supergravity and the Lambda naturalness problem [PDF]

, 2015
The successful $\Lambda CDM$ cosmological model requires a small but nonzero $\Lambda$ which appears to have an unnaturally small value compared to the supersymmetry breaking scale, typically $O(10^{-60}) m_{3/2}^4$ for $m_{3/2} \sim 10 TeV$.
Hewitt, M.
core  

Few‐Photon Fluorescence From Ultracold Bosons in an Optical Cavity

Contributions to Plasma Physics, EarlyView.
ABSTRACT Within a cavity quantum electrodynamics framework, we analyse the fluorescent spectrum of ultracold bosons in resonant and second‐harmonic generation (SHG) regimes. Two settings are considered: (i) (few) bosons in an optical lattice and (ii) a trapped two‐component dilute Bose–Einstein condensate (2BEC) within the Bogoliubov scheme.
Megha Gopalakrishna, Emil Viñas Boström, Claudio Verdozzi   +2 more
wiley   +1 more source

Predicting Statistical Signatures of Collective Emission in Disordered Color Center Ensembles

Laser &Photonics Reviews, EarlyView.
We present an efficient simulation framework for modeling collective emission in disordered ensembles of quantum emitters. The low computational complexity enables large‐scale Monte Carlo simulations. Applied to SiV−${\rm SiV}^{-}$ clusters, it predicts thresholded superradiant bursts set by emitter number and quantum efficiency, as well as interaction‐
Qingyi Zhou, Wenxin Wu, Maryam Zahedian, Zongfu Yu, Jennifer T. Choy   +4 more
wiley   +1 more source