Bosonic two-stroke heat engines with polynomial nonlinear coupling

• URL: http://arxiv.org/abs/2502.17409v1
• Date: Mon, 24 Feb 2025 18:41:57 GMT
• Title: Bosonic two-stroke heat engines with polynomial nonlinear coupling
• Authors: Giovanni Chesi, Chiara Macchiavello, Massimiliano Federico Sacchi,
• Abstract summary: We study the thermodynamics of two-stroke heat engines where two bosonic modes $a$ and $b$ are coupled by the general nonlinear interaction $V_theta = exp (theta adagger nbm - theta*anbdagger m)$.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: We study the thermodynamics of two-stroke heat engines where two bosonic modes $a$ and $b$ are coupled by the general nonlinear interaction $V_{\theta} = \exp {(\theta a^{\dagger n}b^m - \theta^*a^nb^{\dagger m})}$. By adopting the two-point measurement scheme we retrieve the distribution of the stochastic work, and hence the relative fluctuations of the extracted work up to the second order in the coupling $\theta$. We identify the optimal interactions providing large average work with small fluctuations in the operational regime of the heat engine. Then, we consider the specific cases $n=2$, $m=1$ and $n=1$, $m=2$ up to the fourth order in $\theta$. We optimize the average work and the signal-to-noise ratio over the frequencies of the bosonic modes and the temperatures of the reservoirs. Finally, we determine the thermodynamic uncertainty relations for these processes in relation with the order of the expansion of the unitary interaction $V_{\theta}$.

Related papers

• Modular variable laser cooling for efficient entropy extraction [34.82692226532414]
  We show a method for laser cooling an oscillator based on sequences of spin-state-dependent displacements followed by spin repumps. We demonstrate the method experimentally using the internal and motional states of a single trapped ion.
  arXiv  Detail & Related papers  (2024-08-28T20:28:21Z)
• Advantages of non-Hookean coupling in a measurement-fueled two-oscillator engine [65.268245109828]
  A quantum engine composed of two oscillators with a non-Hookean coupling is proposed. Unlike the more common quantum heat engines, the setup introduced here does not require heat baths as the energy for the operation originates from measurements. Numerical simulations are used to demonstrate the measurement-driven fueling, as well as the reduced decoupling energy.
  arXiv  Detail & Related papers  (2023-11-08T04:09:26Z)
• Work Fluctuations in Ergotropic Heat Engines [0.0]
  We study the work fluctuations in ergotropic heat engines, namely two-strokes quantum Otto engines. We provide an exhaustive study for the case of two qutrits whose energy levels are equally spaced at two different frequencies.
  arXiv  Detail & Related papers  (2023-10-16T12:31:28Z)
• Exact solution for the filling-induced thermalization transition in a 1D fracton system [0.0]
  We study a random circuit model of constrained fracton dynamics in which particles undergo random local motion. We identify an exact solution for the critical density $n_c$. We show that there is a universal value of the correlation length exponent $nu = 2$ near the transition.
  arXiv  Detail & Related papers  (2022-10-05T18:00:02Z)
• On parametric resonance in the laser action [91.3755431537592]
  We consider the selfconsistent semiclassical Maxwell--Schr"odinger system for the solid state laser. We introduce the corresponding Poincar'e map $P$ and consider the differential $DP(Y0)$ at suitable stationary state $Y0$.
  arXiv  Detail & Related papers  (2022-08-22T09:43:57Z)
• Thermalization in many-fermion quantum systems with one- plus random $k$-body interactions [2.28438857884398]
  We study thermalization in finite many-fermion systems with random $k$-body interactions in presence of a mean-field. For higher body rank of interaction $k$, system thermalizes faster.
  arXiv  Detail & Related papers  (2022-06-21T15:24:40Z)
• Photoinduced prethermal order parameter dynamics in the two-dimensional large-$N$ Hubbard-Heisenberg model [77.34726150561087]
  We study the microscopic dynamics of competing ordered phases in a two-dimensional correlated electron model. We simulate the light-induced transition between two competing phases.
  arXiv  Detail & Related papers  (2022-05-13T13:13:31Z)
• Quantum Thermal Transport Beyond Second Order with the Reaction Coordinate Mapping [0.0]
  We study steady-state heat current beyond second-order in two models: The generalized spin-boson model with non-commuting system-bath operators and a three-level ladder system. We identify two transport pathways: (i) System's current, where heat conduction is mediated by transitions in the system, with the heat current scaling as $j_q propto lambda2$ to lowest order in $lambda$.
  arXiv  Detail & Related papers  (2022-03-11T18:44:19Z)
• Ultrafast dynamics of cold Fermi gas after a local quench [0.0]
  We consider non-equilibrium dynamics of two initially independent reservoirs $A$ and $B$ filled with a cold Fermi gas coupled and decoupled by two quantum quenches following one another. We find that the von Neumann entropy production induced by the quench is faster than thermal transport between the reservoirs. We show that once $A$ and $B$ become coupled, their entropies grow (on a timescale of the Fermi time) faster than the heat flow within the system.
  arXiv  Detail & Related papers  (2021-08-26T21:00:00Z)
• Dynamics of Open Quantum Systems II, Markovian Approximation [0.0]
  We show that for fixed, small values of the coupling constant $lambda$, the true reduced dynamics of the system is approximated by the Davies-Lindblad generator. The difference between the true and the Markovian dynamics is $O(lambda|1/4)$ for all times.
  arXiv  Detail & Related papers  (2021-04-30T18:09:35Z)
• Anharmonic oscillator: a solution [77.34726150561087]
  The dynamics in $x$-space and in $(gx)-space corresponds to the same energy spectrum with effective coupling constant $hbar g2$. A 2-classical generalization leads to a uniform approximation of the wavefunction in $x$-space with unprecedented accuracy.
  arXiv  Detail & Related papers  (2020-11-29T22:13:08Z)
• Anisotropy-mediated reentrant localization [62.997667081978825]
  We consider a 2d dipolar system, $d=2$, with the generalized dipole-dipole interaction $sim r-a$, and the power $a$ controlled experimentally in trapped-ion or Rydberg-atom systems. We show that the spatially homogeneous tilt $beta$ of the dipoles giving rise to the anisotropic dipole exchange leads to the non-trivial reentrant localization beyond the locator expansion.
  arXiv  Detail & Related papers  (2020-01-31T19:00:01Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.