Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra. Schrödinger...
Thermodynamic Systems01:06

Thermodynamic Systems

A thermodynamic system is a set of objects whose thermodynamic properties are of interest. The system is considered to be embedded in its surroundings or the environment. The system and its environment can exchange heat and do work on each other through a boundary that separates them. However, the immediate surroundings of the system interact with it directly and therefore have a much stronger influence on its behavior and properties.
Consider an example of  tea boiling in a kettle. The tea and...
Two Components: Liquid–Liquid Systems01:27

Two Components: Liquid–Liquid Systems

A pressure-composition phase diagram explicitly describes the behavior of an ideal solution of two volatile liquids under varying pressures and compositions. A pressure-composition diagram has two main curves. The bubble point curve represents the plot of pressure versus liquid mole fraction. It indicates the pressure at which the first bubble of vapor forms from the liquid phase as the system pressure decreases.The dew point curve is the pressure versus vapor mole fraction. It indicates the...
The Carnot Cycle and the Second Law of Thermodynamics01:20

The Carnot Cycle and the Second Law of Thermodynamics

The Carnot engine works between two heat reservoirs of fixed temperatures. The Carnot cycle begs the following question: Is it possible to devise a heat engine that is more efficient than a Carnot engine between two fixed temperatures? The answer lies in designing a Carnot refrigerator.
Since the individual steps in a Carnot cycle can be reversed, the entire cycle is, thus, reversible. If a Carnot cycle is reversed, it becomes a Carnot refrigerator. It extracts heat Qc from a cold reservoir at...
Path Between Thermodynamics States01:21

Path Between Thermodynamics States

Consider the two thermodynamic processes involving an ideal gas that are represented by paths AC and ABC in Figure 1:
Cyclic Processes And Isolated Systems01:19

Cyclic Processes And Isolated Systems

A thermodynamic system with zero heat exchange and work is an isolated system. For these systems, the internal energy remains constant.
In the case of a non-isolated system, the change in the internal energy is zero only if the process is cyclic. A thermodynamic process is considered cyclic if the system undergoes a series of changes and returns to its initial state. 
Consider a cyclic process that returns to its initial state, undergoing a four-step process. The heat transfer along each path...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

[Progress in the development of pertussis-containing vaccines and immunization strategies].

Zhonghua yu fang yi xue za zhi [Chinese journal of preventive medicine]·2026
Same author

[Association between Karst landform distribution and prevalence of dental caries and elevated blood pressure in children aged 7-12 years].

Zhonghua liu xing bing xue za zhi = Zhonghua liuxingbingxue zazhi·2026
Same author

Precise Measurement of the Cosmic Ray Helium Spectrum above 0.1 PeV.

Physical review letters·2026
Same author

[Single cell sequencing technology for analyzing the interaction between type 3 innate lymphoid cells and regulatory T cells in patients with fibrostenotic Crohn's disease].

Zhonghua yi xue za zhi·2025
Same author

[Influencing factors analysis and prediction model establishment of toe-amputation in patients with diabetic foot].

Zhonghua yi xue za zhi·2025
Same author

[Analysis of the virulence and genetic differences of carbapenem-resistant <i>Acinetobacter baumannii</i> epidemic clones].

Zhonghua yu fang yi xue za zhi [Chinese journal of preventive medicine]·2024

Related Experiment Video

Updated: May 14, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Quantum Brayton cycle with coupled systems as working substance.

X L Huang1, L C Wang, X X Yi

  • 1School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, China. huangxiaoli1982@foxmail.com

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|February 16, 2013
PubMed
Summary

We investigate the quantum Brayton cycle using a composite system. The study reveals distinct quantum cycles for subsystems and enhanced work output, with potential for refrigerators and heat engines operating simultaneously.

More Related Videos

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
11:03

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Related Experiment Videos

Last Updated: May 14, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
11:03

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Area of Science:

  • Quantum thermodynamics
  • Statistical mechanics
  • Composite quantum systems

Background:

  • The Brayton cycle is a fundamental thermodynamic cycle.
  • Quantum thermodynamics explores thermodynamic principles at the quantum level.
  • Composite systems offer unique thermodynamic behaviors.

Purpose of the Study:

  • To investigate the quantum Brayton cycle in a composite system.
  • To analyze the thermodynamic performance and efficiency of quantum Brayton cycles.
  • To explore the potential for novel quantum thermodynamic devices.

Main Methods:

  • Theoretical modeling of a composite system undergoing quantum Brayton cycles.
  • Analysis of two distinct quantum Brayton cycles based on external field and coupling constant.
  • Comparison of efficiency and work output between composite and subsystem cycles.

Main Results:

  • Two types of quantum Brayton cycles are defined for the composite system.
  • Subsystem exhibits a quantum Brayton cycle or quantum Otto cycle depending on the process.
  • Composite system efficiency matches subsystem efficiency, but total work output is enhanced.
  • Coexistence of a refrigerator subsystem and a heat engine in one cycle configuration.

Conclusions:

  • The quantum Brayton cycle in composite systems offers enhanced work output compared to individual subsystems.
  • Specific configurations allow for simultaneous operation of heat engines and refrigerators.
  • Findings can be generalized to other coupled quantum systems for quantum heat engine design.