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RISS 인기검색어
- 검색키워드
- 저자 : Armatas, Gerasimos S. (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Mercouri G. Kanatzidis: Excellence and Innovations in Inorganic and Solid-State Chemistry
Arachchige, Indika U.,Armatas, Gerasimos S.,Biswas, Kanishka,Subrahmanyam, Kota S.,Latturner, Susan,Malliakas, Christos D.,Manos, Manolis J.,Oh, Youngtak,Polychronopoulou, Kyriaki,P. Poudeu, Pierre. F ACS AMERICAN CHEMICAL SOCIETY 2017 Inorganic Chemistry Vol.56 No.14
<P>Over the last 3-4 decades, solid-state chemistry has emerged as the forefront of materials design and development. The field has revolutionized into a multidisciplinary subject and matured with a scope of new synthetic strategies, new challenges, and opportunities. Understanding the structure is very crucial in the design of appropriate materials for desired applications. Professor Mercouri G. Kanatzidis has encountered both challenges and opportunities during the course of the discovery of many novel materials. Throughout his scientific career, Mercouri and his group discovered several inorganic compounds and pioneered structure-property relationships. We, a few Ph.D. and postdoctoral students, celebrate his 60th birthday by providing a Viewpoint summarizing his contributions to inorganic solid-state chemistry. The topics discussed here are of significant interest to various scientific communities ranging from condensed matter to green energy production.</P>
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Nonequilibrium dressing in a cavity with a movable reflecting mirror
Armata, Federico,Kim, M. S.,Butera, Salvatore,Rizzuto, Lucia,Passante, Roberto American Physical Society 2017 Physical Review D Vol.96 No.4
<P>We consider a movable mirror coupled to a one-dimensional massless scalar field in a cavity. Both the field and the mirror's mechanical degrees of freedom are described quantum mechanically, and they can interact with each other via the radiation pressure operator. We investigate the dynamical evolution of mirror and field starting from a nonequilibrium initial state, and their local interaction which brings the system to a stationary configuration for long times. This allows us to study the time-dependent dressing process of the movable mirror interacting with the field, and its dynamics leading to a local equilibrium dressed configuration. Also, in order to explore the effect of the radiation pressure on both sides of the movable mirror, we generalize the effective field-mirror Hamiltonian and previous results to the case of two cavities sharing the same mobile boundary. This leads us to address, in the appropriate limit, the dynamical dressing problem of a single mobile wall, bounded by a harmonic potential, in the vacuum space.</P>
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Quantum limits to gravity estimation with optomechanics
Armata, F.,Latmiral, L.,Plato, A. D. K.,Kim, M. S. American Physical Society 2017 Physical Review A Vol.96 No.4
<P>We present a table-top quantum estimation protocol to measure the gravitational acceleration g by using an optomechanical cavity. In particular, we exploit the nonlinear quantum light-matter interaction between an optical field and a massive mirror acting as mechanical oscillator. The gravitational field influences the system dynamics affecting the phase of the cavity field during the interaction. Reading out such a phase carried by the radiation leaking from the cavity, we provide an estimate of the gravitational acceleration through interference measurements. Contrary to previous studies, having adopted a fully quantum description, we are able to propose a quantum analysis proving the ultimate bound to the estimability of the gravitational acceleration and verifying optimality of homodyne detection. Noticeably, thanks to the light-matter decoupling at the measurement time, no initial cooling of the mechanical oscillator is demanded in principle.</P>
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