Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Altintas, Ferdi"'
We investigate the coherence and non-Markovianity of a quantum tunneling system whose barrier is fluctuated by a telegraph noise, and its energy gap is modulated by Gaussian noise. With the help of averaging method, the system dynamics are analytical
Externí odkaz:
http://arxiv.org/abs/2208.07947
Autor:
Çakmak, Selçuk, Altintas, Ferdi
A single driven spin is investigated as the working substance of a six-stroke irreversible quantum Carnot cycle. The role of inner friction associated with the finite-time adiabatic transformations on the cycle efficiency and the harvested work are i
Externí odkaz:
http://arxiv.org/abs/2002.01457
Publikováno v:
EPL 117 (2017) 50002
We propose a spin-star network, where a central spin-$1/2$ is coupled with XXZ interaction to $N$ outer spin-$1/2$ particles, as a quantum fuel. If the network is in thermal equilibrium with a cold bath, the central spin can have an effective tempera
Externí odkaz:
http://arxiv.org/abs/1611.01475
Publikováno v:
Eur. Phys. J. D 71 (2017) 75
We propose an arbitrary driven spin as the working fluid of a quantum Otto cycle in the presence of internal friction. The role of total allocated time to the adiabatic branches of the cycle, generated by different control field profiles, on the extr
Externí odkaz:
http://arxiv.org/abs/1605.02522
Publikováno v:
Phys. Scr. 91 (2016) 075101
The concept of internal friction, a fully quantum mechanical phenomena, is investigated in a simple, experimentally accessible quantum system in which a spin-1/2 is driven by a transverse magnetic field in a quantum adiabatic process. The irreversibl
Externí odkaz:
http://arxiv.org/abs/1602.06164
Publikováno v:
Eur. Phys. J. Plus (2016) 131: 197
Lipkin-Meshkov-Glick model of two anisotropically interacting spins in a magnetic field is proposed as a working substance of a quantum Otto engine to explore and exploit the anisotropy effects for the optimization of engine operation. Three differen
Externí odkaz:
http://arxiv.org/abs/1510.04495
Publikováno v:
Phys. Rev. E 92, 022142 (2015)
We investigate a quantum heat engine with a working substance of two particles, one with a spin $1/2$ and the other with an arbitrary spin (spin $s$), coupled by Heisenberg exchange interaction, and subject to an external magnetic field. The engine o
Externí odkaz:
http://arxiv.org/abs/1502.00513
Publikováno v:
Phys. Rev. E 90, 032102 (2014)
We propose a four level quantum heat engine in Otto cycle with a working substance of two spins subject to an external magnetic field and coupled to each other by a one-axis twisting spin squeezing nonlinear interaction. We calculate the positive wor
Externí odkaz:
http://arxiv.org/abs/1403.2781
Publikováno v:
Phys. Rev. A 91, 023816 (2015)
We propose a multilevel quantum heat engine with a working medium described by a generalized Rabi model which consists of a two-level system coupled to a single mode bosonic field. The model is constructed to be a continuum limit of a quantum biologi
Externí odkaz:
http://arxiv.org/abs/1401.4926
Publikováno v:
EPL 105 (2014) 40001
We consider a generalization of recently proposed non-Hermitian model for resonant cavities coupled by a chiral mirror by taking into account number non-conservation and nonlinear interactions. We analyze non-Hermitian quantum dynamics of populations
Externí odkaz:
http://arxiv.org/abs/1312.3995