Spin-mechanical thermal machines

• URL: http://arxiv.org/abs/2410.00439v1
• Date: Tue, 1 Oct 2024 06:37:58 GMT
• Title: Spin-mechanical thermal machines
• Authors: Mohamed Hatifi, Anshuman Nayak, Jason Twamley,
• Abstract summary: We introduce a method to construct a quantum battery and a quantum Otto heat engine. By precisely controlling the NV spin, we enable efficient energy exchange despite significant detuning. We implement a quantum Otto engine that produces mechanical work at maximum efficiency without decoupling from the hot bath.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We introduce a method to construct a quantum battery and a quantum Otto heat engine using a Nitrogen-Vacancy (NV) center spin coupled to a mechanical oscillator in a highly detuned regime. By precisely controlling the NV spin, we enable efficient energy exchange despite significant detuning, challenging conventional assumptions. This leads to a robust mechanical quantum battery and a cooling scheme driving the oscillator toward its ground state. Leveraging this, we implement a quantum Otto engine that produces mechanical work at maximum efficiency without decoupling from the hot bath, paving the way for practical quantum thermal machines.

Related papers

• Optimizing Entanglement in Nanomechanical Resonators through Quantum Squeezing and Parametric Amplification [0.0]
  We propose a scheme that optimize entanglement in nanomechanical resonators through quantum state transfer of squeezed fields assisted by radiation pressure. The system is driven by red-detuned laser fields, which enable simultaneous cooling of the mechanical resonators.
  arXiv  Detail & Related papers  (2024-10-20T09:37:30Z)
• Suppression of quantum dissipation: A cooperative effect of quantum squeezing and quantum measurement [22.051290654737976]
  We propose a scheme for beating environment-induced dissipation in an open two-level system coupled to a parametrically driven cavity. We demonstrate that, in the presence of the cooperation, the system dynamics can be completely dominated by the effective system-cavity interaction. This work provides a generic method of dissipation suppression in a variety of quantum mechanical platforms, including natural atoms and superconducting circuits.
  arXiv  Detail & Related papers  (2024-07-12T15:10:44Z)
• Exploring the role of criticality in the quantum Otto cycle fueled by the anisotropic quantum Rabi-Stark model [0.0]
  Quantum heat machines, encompassing heat engines, refrigerators, heaters, and accelerators, represent the forefront of quantum thermodynamics. This paper investigates a quantum Otto engine operating in both ideal and finite-time scenarios. By focusing on quantum heat engines, our study reveals that these phase transitions critically modulate the efficiency and power of AQRSM-based engines.
  arXiv  Detail & Related papers  (2024-07-12T06:36:57Z)
• An atom-doped photon engine: Extracting mechanical work from a quantum system via radiation pressure [0.0]
  We introduce a model featuring an atom-doped optical quantum cavity propelling a classical piston through radiation pressure. We employ the model to construct quantum Otto and Carnot engines, comparing their performance in terms of energetics, work output, efficiency, and power under various conditions.
  arXiv  Detail & Related papers  (2023-11-27T10:57:26Z)
• Thermodynamics and Fluctuations in Quantum Heat Engines under Reservoir Squeezing [7.109424824240926]
  We show that reservoir squeezing significantly enhances the performance by increasing the thermodynamic efficiency and the power. An experimental scheme for realizing this quantum heat engine is proposed using a single-electron spin pertaining to a trapped 40Ca$+$ ion.
  arXiv  Detail & Related papers  (2022-09-13T11:15:31Z)
• Impurity reveals distinct operational phases in quantum thermodynamic cycles [23.09629129922603]
  impurity unlocks new operational phases in the system, such as a quantum heat engine, quantum refrigerator, and quantum cold pump. The cooling power and coefficient of performance of the quantum refrigerator and quantum cold pump are non-trivially affected by the impurity.
  arXiv  Detail & Related papers  (2022-07-06T13:01:06Z)
• Model-free optimization of power/efficiency tradeoffs in quantum thermal machines using reinforcement learning [0.0]
  A quantum thermal machine is an open quantum system that enables the conversion between heat and work at the micro or nano-scale. We introduce a general model-free framework based on Reinforcement Learning to identify out-of-equilibrium thermodynamic cycles.
  arXiv  Detail & Related papers  (2022-04-10T22:44:28Z)
• The quantum Otto cycle in a superconducting cavity in the non-adiabatic regime [62.997667081978825]
  We analyze the efficiency of the quantum Otto cycle applied to a superconducting cavity. It is shown that, in a non-adiabatic regime, the efficiency of the quantum cycle is affected by the dynamical Casimir effect.
  arXiv  Detail & Related papers  (2021-11-30T11:47:33Z)
• Quantum manipulation of a two-level mechanical system [19.444636864515726]
  We consider a nonlinearly coupled electromechanical system, and develop a quantitative theory for two-phonon cooling. In the presence of two-phonon cooling, the mechanical Hilbert space is effectively reduced to its ground and first excited states. We propose a scheme for performing arbitrary Bloch sphere rotations, and derive the fidelity in the specific case of a $pi$-pulse.
  arXiv  Detail & Related papers  (2021-01-05T19:34:44Z)
• Waveguide quantum optomechanics: parity-time phase transitions in ultrastrong coupling regime [125.99533416395765]
  We show that the simplest set-up of two qubits, harmonically trapped over an optical waveguide, enables the ultrastrong coupling regime of the quantum optomechanical interaction. The combination of the inherent open nature of the system and the strong optomechanical coupling leads to emerging parity-time (PT) symmetry. The $mathcalPT$ phase transition drives long-living subradiant states, observable in the state-of-the-art waveguide QED setups.
  arXiv  Detail & Related papers  (2020-07-04T11:02:20Z)
• Reservoir engineering with arbitrary temperatures for spin systems and quantum thermal machine with maximum efficiency [50.591267188664666]
  Reservoir engineering is an important tool for quantum information science and quantum thermodynamics. We employ this technique to engineer reservoirs with arbitrary (effective) negative and positive temperatures for a single spin system.
  arXiv  Detail & Related papers  (2020-01-28T00:18:00Z)

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.