Experimental investigation of a quantum heat engine powered by generalized measurements

  title={Experimental investigation of a quantum heat engine powered by generalized measurements},
  author={Vinicius S. F. Lisboa and Pedro R. Dieguez and Jeconias Rocha Guimar{\~a}es and J. F. G. Santos and Roberto M. Serra},
  journal={Physical Review A},
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. Here, we performed a proof-of-concept experiment using nuclear magnetic resonance techniques to investigate a spin quantum heat engine driven by non-selective generalized (weak) measurements without feedback control. Our prototype of a… 

Figures from this paper

Thermal devices powered by generalized measurements with indefinite causal order

A quantum-controlled device may produce a scenario in which two general quantum operations can be performed in such a way that it is not possible to associate a definite order for the operations

Monitored non-adiabatic and coherent-controlled quantum unital Otto heat engines: First four cumulants

Recently, measurement-based quantum thermal machines draw more attention in the field of quantum thermodynamics. However, the previous results on quantum Otto heat engines were either limited to

$\mathcal{PT}$-symmetric effects in measurement-based quantum thermal machines

Measurement-based quantum thermal machines are fascinating models of thermodynamic cycles where measurement protocols play an important role in the performance and functioning of the cycle. Despite

Correlation-boosted quantum engine: A proof-of-principle demonstration

Employing currently available quantum technology, we design and implement a non-classically correlated SWAP heat engine that allows to achieve an efficiency above the standard Carnot limit. Such an

Experimental Correlation-Boosted Quantum Engine

We design and experimentally implement a two-qubit quantum correlated SWAP heat engine that allows to achieve an efficiency above the standard Carnot limit, and to boost the amount of extractable work,

Quantum Ergotropy and Quantum Feedback Control

We study the energy extraction from and charging to a finite-dimensional quantum system by general quantum operations. We prove that the changes in energy induced by unital quantum operations are

High-dimensional monitoring and the emergence of realism via multiple observers

Quantum measurements are unitary evolutions followed by partial traces. Based on that, we address the problem of the emergence of physical reality from the quantum world by introducing a model that

Necessity of feedback control for the quantum Maxwell demon in a finite-time steady feedback cycle.

We revisit quantum Maxwell demon in thermodynamic feedback cycle in the steady-state regime. We derive a generalized version of the Clausius inequality for a finite-time steady feedback cycle with a

Suppressing coherence effects in quantum-measurement-based engines

The recent advances in the study of thermodynamics of microscopic processes have driven the search for new developments in energy converters utilizing quantum effects. We here propose a universal

Experimental Characterization of a Spin Quantum Heat Engine.

A quantum heat engine based on a spin-1/2 system and nuclear magnetic resonance techniques is experimentally implemented, able to reach an efficiency for work extraction very close to its thermodynamic limit.

Measurement-induced operation of two-ion quantum heat machines.

In this model, the coupling to the hot and the cold baths is never switched off in an alternative fashion during the heat cycle, unlike other existing proposals of quantum heat engines, which makes this proposal experimentally realizable using current tapped-ion technology.

Thermal divergences of quantum measurement engine

A quantum engine fueled by quantum measurement is proposed. Under the finite-time unitary transformation, the conversion of heat to work is realized without the compression and expansion of the

Feedback-controlled heat transport in quantum devices: theory and solid-state experimental proposal

A theory of feedback-controlled heat transport in quantum systems is presented. It is based on modelling heat engines as driven multipartite systems subject to projective quantum measurements and

Quantum Measurement Cooling.

It is found that the probability that QMC occurs when the measurement basis is chosen randomly can be very large as compared to the probability of extracting energy (heat engine operation), while remaining always smaller than the most useless operation, namely, dumping heat in both baths.

A quantum Szilard engine without heat from a thermal reservoir

We study a quantum Szilard engine that is not powered by heat drawn from a thermal reservoir, but rather by projective measurements. The engine is constituted of a system  , a weight  , and a

Measurement-based quantum heat engine in a multilevel system

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

Coherence-enhanced efficiency of feedback-driven quantum engines

A genuine feature of projective quantum measurements is that they inevitably alter the mean energy of the observed system if the measured quantity does not commute with the Hamiltonian. Compared to

Two-stroke Quantum Measurement Heat Engine

We propose and analyze the theoretical model for a two-stroke quantum heat engine with one of the heat baths replaced by a non-selective quantum measurement. We show that the engine’s invariant