Measurement-based quantum heat engine in a multilevel system
- URL: http://arxiv.org/abs/2108.02229v2
- Date: Sun, 28 Nov 2021 12:44:40 GMT
- Title: Measurement-based quantum heat engine in a multilevel system
- Authors: Maron F. Anka, Thiago R. de Oliveira and Daniel Jonathan
- Abstract summary: We compare quantum Otto engines based on two different cycle models: a two-bath model, with a standard heat source and sink, and a measurement-based protocol.
We study these cycles using two different working substances': a single qutrit (spin-1 particle) or a pair of qubits (spin-1/2 particles) interacting via the XXZ Heisenberg interaction.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We compare quantum Otto engines based on two different cycle models: a
two-bath model, with a standard heat source and sink, and a measurement-based
protocol, where the role of heat source is played by a quantum measurement. We
furthermore study these cycles using two different `working substances': a
single qutrit (spin-1 particle) or a pair of qubits (spin-1/2 particles)
interacting via the XXZ Heisenberg interaction. Although both cycle models have
the same efficiency when applied on a single-qubit working substance, we find
that both can reach higher efficiencies using these more complex working
substances, by exploiting the existence of `idle' levels, i.e., levels that do
not shift while the spins are subjected to a variable magnetic field.
Furthermore, with an appropriate choice of measurement, the measurement-based
protocol becomes more efficient than the two-bath model.
Related papers
- 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) - Universal quantum Otto heat machine based on the Dicke model [0.0]
We study a quantum Otto thermal machine where the working substance is composed of N identical qubits coupled to a single mode of a bosonic field.
We show that it is possible to build a universal quantum heat machine (UQHM) that can function as an engine, refrigerator, heater or accelerator.
arXiv Detail & Related papers (2023-08-13T02:27:17Z) - Quantum field heat engine powered by phonon-photon interactions [58.720142291102135]
We present a quantum heat engine based on a cavity with two oscillating mirrors.
The engine performs an Otto cycle during which the walls and a field mode interact via a nonlinear Hamiltonian.
arXiv Detail & Related papers (2023-05-10T20:27:15Z) - Evolution of many-body systems under ancilla quantum measurements [58.720142291102135]
We study the concept of implementing quantum measurements by coupling a many-body lattice system to an ancillary degree of freedom.
We find evidence of a disentangling-entangling measurement-induced transition as was previously observed in more abstract models.
arXiv Detail & Related papers (2023-03-13T13:06:40Z) - Experimental investigation of a quantum heat engine powered by
generalized measurements [0.0]
Generalized measurements may allow the control of its back-action on the quantum system by interpolating from a very weak to strong projective action.
Such a measurement can fuel a quantum heat engine or extract work depending on the system-meter interaction.
arXiv Detail & Related papers (2022-04-03T10:30:01Z) - Implementation of a two-stroke quantum heat engine with a collisional
model [50.591267188664666]
We put forth a quantum simulation of a stroboscopic two-stroke thermal engine in the IBMQ processor.
The system consists of a quantum spin chain connected to two baths at their boundaries, prepared at different temperatures using the variational quantum thermalizer algorithm.
arXiv Detail & Related papers (2022-03-25T16:55:08Z) - Driven quantum harmonic oscillators: A working medium for thermal
machines [0.0]
We consider a working substance that is permanently coupled to two or more baths at different temperatures and continuously driven.
We derive the heat flows and power of the working device which can operate as an engine, refrigerator or accelerator.
An increased driving frequency can lead to a change of functioning to a dissipator.
arXiv Detail & Related papers (2021-08-25T16:53:45Z) - Quantum heat engines with complex working media, complete Otto cycles
and heuristics [0.0]
We examine the performance of a quasi-static quantum Otto engine based on two spins of arbitrary magnitudes.
The study of complete Otto cycles inherent in the average cycle also yields interesting insights into the average performance.
arXiv Detail & Related papers (2021-07-26T16:18:50Z) - 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) - Power maximization of two-stroke quantum thermal machines [0.0]
We study two types of two-stroke cycles where two collections of identical quantum systems are initially prepared at thermal equilibrium.
In both cycles, the power peaks of qubit systems can surpass the Curzon-Ahlborn efficiency.
arXiv Detail & Related papers (2020-10-07T15:52:17Z) - 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.