Zobrazeno 1 - 10
of 340
pro vyhledávání: '"Gershon Kurizki"'
Publikováno v:
npj Quantum Information, Vol 10, Iss 1, Pp 1-7 (2024)
Abstract Atoms falling into a black hole (BH) through a cavity are shown to enable coherent amplification of light quanta powered by the BH-gravitational vacuum energy. This process can harness the BH energy towards useful purposes, such as propellin
Externí odkaz:
https://doaj.org/article/17fbb518eee14ac9b332a39099ff44c7
Autor:
Durga Bhaktavatsala Rao Dasari, Sen Yang, Arnab Chakrabarti, Amit Finkler, Gershon Kurizki, Jörg Wrachtrup
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-10 (2022)
The existing paradigms of system-bath control typically assume that the bath state is unchanged. By using spin defects in diamond, Dasari et al. demonstrate a scheme for controlling the state of the nuclear spin bath via selective measurements of the
Externí odkaz:
https://doaj.org/article/5edde03d61a64012b6e57d735b69cc1f
Autor:
Abraham G. Kofman, Gershon Kurizki
Publikováno v:
Entropy, Vol 24, Iss 1, p 106 (2022)
The consensus regarding quantum measurements rests on two statements: (i) von Neumann’s standard quantum measurement theory leaves undetermined the basis in which observables are measured, and (ii) the environmental decoherence of the measuring dev
Externí odkaz:
https://doaj.org/article/bca5d607b3544c1bb75153da885a559d
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-13 (2018)
Evaluating maximum conversion efficiency from heat to work using non-thermal baths can lead to meaningless results, when based only on the reversibility requirement. Here, the authors solve this problem by identifying the fraction of exchanged energy
Externí odkaz:
https://doaj.org/article/d811f3d9ae424b03ac6c6575bf244fc4
Publikováno v:
Physical Review Research, Vol 2, Iss 3, p 033285 (2020)
We reveal the potentially important role of a general mechanism in quantum heat management schemes, namely, spectral filtering of the coupling between the heat baths in the setup and the quantum system that controls the heat flow. Such filtering is e
Externí odkaz:
https://doaj.org/article/3b0b0c71fe5a4d0f949ebbf897df83bd
Publikováno v:
New Journal of Physics, Vol 22, Iss 8, p 083035 (2020)
The occurrence of any physical process is restricted by the constraints imposed by the laws of thermodynamics on the energy and entropy exchange involved. A prominent class of processes where thermodynamic constraints are crucial involve polarization
Externí odkaz:
https://doaj.org/article/04306d710d9845959e7eb1fd8dd1bccf
Publikováno v:
Quantum, Vol 3, p 155 (2019)
We propose to implement a quantized thermal machine based on a mixture of two atomic species. One atomic species implements the working medium and the other implements two (cold and hot) baths. We show that such a setup can be employed for the refrig
Externí odkaz:
https://doaj.org/article/e31f06e29e3c421b98575f6d5cc78522
Autor:
Wolfgang Niedenzu, Gershon Kurizki
Publikováno v:
New Journal of Physics, Vol 20, Iss 11, p 113038 (2018)
We study the impact of cooperative many-body effects on the operation of periodically-driven quantum thermal machines, particularly heat engines and refrigerators. In suitable geometries, N two-level atoms can exchange energy with the driving field a
Externí odkaz:
https://doaj.org/article/de348e6fc89a4515bb7d2f6c5ea17d8a
Publikováno v:
Technologies, Vol 5, Iss 1, p 1 (2016)
We review our unified optimized approach to the dynamical control of quantum-probe interactions with noisy and complex systems viewed as thermal baths. We show that this control, in conjunction with tools of quantum estimation theory, may be used for
Externí odkaz:
https://doaj.org/article/9edc388bcc3c416fbf1b01ae59310aff
Publikováno v:
Entropy, Vol 18, Iss 7, p 244 (2016)
In this paper, we address the question: To what extent is the quantum state preparation of multiatom clusters (before they are injected into the microwave cavity) instrumental for determining not only the kind of machine we may operate, but also the
Externí odkaz:
https://doaj.org/article/ead5d443b718493c9cd52781e4414c68