Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Obinna Abah"'
Publikováno v:
Physical Review Research, Vol 6, Iss 3, p 033037 (2024)
We present the irreversibility generated by a stationary cavity magnomechanical system composed of a yttrium iron garnet (YIG) sphere with a diameter of a few hundred micrometers inside a microwave cavity. In this system, the magnons, i.e., collectiv
Externí odkaz:
https://doaj.org/article/f8ac3de445244bbfbbc89d400a52f57b
Publikováno v:
Physical Review Research, Vol 4, Iss 2, p L022017 (2022)
Crossing a quantum critical point in finite time challenges the adiabatic condition due to the closing of the energy gap, which ultimately results in the formation of excitations. Such nonadiabatic excitations are typically deemed detrimental in many
Externí odkaz:
https://doaj.org/article/94d9bfea59f64bdd8a77d0857bdb33a1
Publikováno v:
Physical Review Research, Vol 4, Iss 4, p 043061 (2022)
Quantum metrology refers to the use of quantum resources in parameter-estimation protocols, aiming at enhancing its precision. The quantum Fisher information is a key quantity in this context, setting the ultimate achievable precision with respect to
Externí odkaz:
https://doaj.org/article/35b3ccbf170d4b1d93c0b185a1c5d5e7
Publikováno v:
New Journal of Physics, Vol 23, Iss 10, p 105001 (2021)
Relativistic quantum systems exhibit unique features not present at lower energies, such as the existence of both particles and antiparticles, and restrictions placed on the system dynamics due to the light cone. In order to understand what impact th
Externí odkaz:
https://doaj.org/article/491266137f1c416eb37e4638ae6310f6
Publikováno v:
Physical Review Research, Vol 2, Iss 2, p 023120 (2020)
We investigate the performance of a quantum Otto refrigerator operating in finite time and exploiting local counterdiabatic techniques. We evaluate its coefficient of performance and cooling power when the working medium consists of a quantum harmoni
Externí odkaz:
https://doaj.org/article/69fd43cfce9f419583880f1544dc6f7d
Autor:
Obinna Abah, Ricardo Puebla, Anthony Kiely, Gabriele De Chiara, Mauro Paternostro, Steve Campbell
Publikováno v:
New Journal of Physics, Vol 21, Iss 10, p 103048 (2019)
We quantitatively assess the energetic cost of several well-known control protocols that achieve a finite time adiabatic dynamics, namely counterdiabatic and local counterdiabatic driving, optimal control, and inverse engineering. By employing a cost
Externí odkaz:
https://doaj.org/article/ba09c9f9e285441fb4ef7005e360bad7
Thermodynamics originated in the need to understand novel technologies developed by the Industrial Revolution. However, over the centuries the description of engines, refrigerators, thermal accelerators, and heaters has become so abstract that a dire
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb731b82df1c6f77638454b7153f3e5a
http://arxiv.org/abs/2201.01740
http://arxiv.org/abs/2201.01740
We investigate quantum Otto engine and refrigeration cycles of a time-dependent harmonic oscillator operating under the conditions of maximum $\Omega$-function, a trade-off objective function which represents a compromise between energy benefits and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::30e3b51d1d0928b5e5b6cca528e0b340
http://arxiv.org/abs/2112.10669
http://arxiv.org/abs/2112.10669
Publikováno v:
Garbe, L, Abah, O, Felicetti, S & Puebla, R 2022, ' Critical quantum metrology with fully-connected models: from Heisenberg to Kibble–Zurek scaling ', Quantum Science and Technology, vol. 7, no. 3, 035010 . https://doi.org/10.1088/2058-9565/ac6ca5
41 pags., 10 figs., 7 apps.
Phase transitions represent a compelling tool for classical and quantum sensing applications. It has been demonstrated that quantum sensors can in principle saturate the Heisenberg scaling, the ultimate precision boun
Phase transitions represent a compelling tool for classical and quantum sensing applications. It has been demonstrated that quantum sensors can in principle saturate the Heisenberg scaling, the ultimate precision boun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5999037e6c1d5da57defe18957c4ab47
http://arxiv.org/abs/2110.04144
http://arxiv.org/abs/2110.04144