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Related Concept Videos

Entropy Change in Reversible Processes01:10

Entropy Change in Reversible Processes

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In the Carnot engine, which achieves the maximum efficiency between two reservoirs of fixed temperatures, the total change in entropy is zero. The observation can be generalized by considering any reversible cyclic process consisting of many Carnot cycles. Thus, it can be stated that the total entropy change of any ideal reversible cycle is zero.
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Consider an isolated system in which a hot object is placed in contact with a cold one. This is an irreversible process that eventually leads both objects to reach the same equilibrium temperature. It is crucial to note that the constituents of any substance exhibit increased disorder at higher temperatures. As a cold substance absorbs heat, its constituents become more disordered. The energy transfer from a hotter object to a cooler one increases the system's disorder or randomness. This...
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Salt particles that have dissolved in water never spontaneously come back together in solution to reform solid particles. Moreover, a gas that has expanded in a vacuum remains dispersed and never spontaneously reassembles. The unidirectional nature of these phenomena is the result of a thermodynamic state function called entropy (S). Entropy is the measure of the extent to which the energy is dispersed throughout a system, or in other words, it is proportional to the degree of disorder of a...
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Consider an arbitrary process that moves between two specific states (A and B) in a cyclic manner. This process is reversible and broken down into smaller parts that each follow a Carnot cycle. A Carnot cycle has two isothermal (constant temperature) processes. During these processes, the ratio of the amount of heat transferred to their respective temperature remains constant. The other two processes in the Carnot cycle are also reversible but adiabatic, which means they occur without any heat...
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Converting Nonclassicality into Entanglement.

N Killoran1, F E S Steinhoff2,3, M B Plenio1

  • 1Institut für Theoretische Physik, Albert-Einstein-Allee 11, Universität Ulm D-89069 Ulm, Germany.

Physical Review Letters
|March 12, 2016
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Summary
This summary is machine-generated.

This study introduces a general framework to convert nonclassical features into quantum entanglement in multipartite systems. The research uncovers new entanglement convertibility theorems in both discrete and continuous settings.

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Area of Science:

  • Quantum mechanics
  • Quantum information theory

Background:

  • Multipartite quantum systems exhibit nonclassical features like entanglement.
  • Existing research shows nonclassicality can be converted into entanglement in specific cases.

Purpose of the Study:

  • To present a general framework for connecting and converting nonclassicality to entanglement.
  • To uncover new entanglement convertibility theorems.

Main Methods:

  • Development of a general framework based on superposition.
  • Analysis of discrete and continuous scenarios for entanglement conversion.

Main Results:

  • The framework captures previously known results on entanglement convertibility.
  • New entanglement convertibility theorems are revealed for discrete and continuous settings.
  • Connections are established between resource theories of coherence and entanglement.

Conclusions:

  • The proposed framework provides a unified approach to entanglement conversion.
  • The findings generalize and link convertibility properties across different quantum states.
  • Important connections between local and nonlocal nonclassicality are highlighted.