An energy efficient quantum-enhanced machine

• URL: http://arxiv.org/abs/2404.15075v1
• Date: Tue, 23 Apr 2024 14:24:33 GMT
• Title: An energy efficient quantum-enhanced machine
• Authors: Waner Hou, Xingyu Zhao, Kamran Rehan, Yi Li, Yue Li, Eric Lutz, Yiheng Lin, Jiangfeng Du,
• Abstract summary: We apply shortcut-to-adiabaticity techniques to suppress quantum friction and improve work production. While the average energy cost of the shortcut protocol is only about $3%$, the work output is enhanced by up to approximately 33%$. Our results pave the way for energy efficient machines with quantum-enhanced performance.
• Score: 13.368172641201571
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum friction, a quantum analog of classical friction, reduces the performance of quantum machines, such as heat engines, and makes them less energy efficient. We here report the experimental realization of an energy efficient quantum engine coupled to a quantum battery that stores the produced work, using a single ion in a linear Paul trap. We first establish the quantum nature of the device by observing nonclassical work oscillations with the number of cycles as verified by energy measurements of the battery. We moreover successfully apply shortcut-to-adiabaticity techniques to suppress quantum friction and improve work production. While the average energy cost of the shortcut protocol is only about $3\%$, the work output is enhanced by up to approximately 33$\%$, making the machine significantly more energy efficient. In addition, we show that the quantum engine consistently outperforms its classical counterpart in this regime. Our results pave the way for energy efficient machines with quantum-enhanced performance.

Related papers

• Spin-mechanical thermal machines [0.0]
  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.
  arXiv  Detail & Related papers  (2024-10-01T06:37:58Z)
• Energy-conversion device using a quantum engine with the work medium of two-atom entanglement [0.0]
  We report on an energy-conversion device with the working medium acted by two entangled ions confined in a harmonic potential. The two ions are entangled by virtually coupling to one of the vibrational modes shared by the two ions, and the quantum engine couples to a quantum load. We explore the energy conversion efficiency of the quantum engine and investigate the useful energy (i.e., the maximum extractable work) stored in the quantum load.
  arXiv  Detail & Related papers  (2024-04-24T12:14:53Z)
• 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)
• Making statistics work: a quantum engine in the BEC-BCS crossover [0.0]
  We realize a novel quantum many-body engine fuelled by the energy difference between fermionic and bosonic ensembles of ultracold particles. We replace the traditional heating and cooling strokes of a quantum Otto cycle by tuning the gas between a Bose-Einstein condensate of bosonic molecules and a unitary Fermi gas.
  arXiv  Detail & Related papers  (2022-09-28T16:20:14Z)
• Anticipative measurements in hybrid quantum-classical computation [68.8204255655161]
  We present an approach where the quantum computation is supplemented by a classical result. Taking advantage of its anticipation also leads to a new type of quantum measurements, which we call anticipative. In an anticipative quantum measurement the combination of the results from classical and quantum computations happens only in the end.
  arXiv  Detail & Related papers  (2022-09-12T15:47:44Z)
• 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)
• Recompilation-enhanced simulation of electron-phonon dynamics on IBM Quantum computers [62.997667081978825]
  We consider the absolute resource cost for gate-based quantum simulation of small electron-phonon systems. We perform experiments on IBM quantum hardware for both weak and strong electron-phonon coupling. Despite significant device noise, through the use of approximate circuit recompilation we obtain electron-phonon dynamics on current quantum computers comparable to exact diagonalisation.
  arXiv  Detail & Related papers  (2022-02-16T19:00:00Z)
• Quantum thermodynamic methods to purify a qubit on a quantum processing unit [68.8204255655161]
  We report on a quantum thermodynamic method to purify a qubit on a quantum processing unit equipped with identical qubits. Our starting point is a three qubit design that emulates the well known two qubit swap engine. We implement it on a publicly available superconducting qubit based QPU, and observe a purification capability down to 200 mK.
  arXiv  Detail & Related papers  (2022-01-31T16:13:57Z)
• 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)
• Experimental verification of fluctuation relations with a quantum computer [68.8204255655161]
  We use a quantum processor to experimentally validate a number of theoretical results in non-equilibrium quantum thermodynamics. Our experiments constitute the experimental basis for the understanding of the non-equilibrium energetics of quantum computation.
  arXiv  Detail & Related papers  (2021-06-08T14:16:12Z)
• Engineering analog quantum chemistry Hamiltonians using cold atoms in optical lattices [69.50862982117127]
  We benchmark the working conditions of the numerically analog simulator and find less demanding experimental setups. We also provide a deeper understanding of the errors of the simulation appearing due to discretization and finite size effects.
  arXiv  Detail & Related papers  (2020-11-28T11:23:06Z)

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.