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When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
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Related Experiment Video

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Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System
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Bringing entanglement to the high temperature limit.

Fernando Galve1, Leonardo A Pachón, David Zueco

  • 1IFISC (CSIC-UIB), Instituto de Física Interdisciplinar y Sistemas Complejos, Campus Universitat Illes Balears, Palma de Mallorca, Spain.

Physical Review Letters
|January 15, 2011
PubMed
Summary

This study reveals a surprising quantum state with persistent entanglement at high temperatures, challenging the need for extreme cold in quantum experiments.

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07:17

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

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Area of Science:

  • Quantum physics
  • Quantum optics
  • Thermodynamics

Background:

  • Quantum phenomena are usually limited to very low temperatures due to decoherence from hot environments.
  • High temperatures typically destroy delicate quantum states like entanglement.

Purpose of the Study:

  • To investigate the possibility of maintaining quantum entanglement in a system at high temperatures.
  • To explore the role of non-equilibrium conditions in preserving quantum correlations.

Main Methods:

  • Studied a system of two coupled, parametrically driven, dissipative harmonic oscillators.
  • Analyzed the system's behavior under conditions far from thermal equilibrium.
  • Investigated the temperature dependence of entanglement in this driven-dissipative system.

Main Results:

  • Observed a non-equilibrium state in the studied system.
  • Demonstrated that this state exhibits stationary entanglement even at high temperatures.
  • This finding contradicts the general expectation that high temperatures suppress entanglement.

Conclusions:

  • Quantum entanglement can persist at high temperatures in specific non-equilibrium systems.
  • The findings challenge the conventional low-temperature requirement for quantum phenomena.
  • This could simplify experimental setups by reducing the need for extreme cooling.