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Distillation is a separation technique that takes advantage of the boiling point properties of disparate elements in a mixture. To perform distillation, we begin by heating a miscible mixture of two liquids with a significant difference in boiling points (at least 20°C). As the solution heats up and reaches the bubble point of the more volatile component, some molecules of the more volatile component transition into the gas phase and travel upward into the condenser, which is a glass tube...
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The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
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Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the...
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Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
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Gradient Echo Quantum Memory in Warm Atomic Vapor
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Assisted Distillation of Quantum Coherence.

E Chitambar1, A Streltsov2, S Rana2

  • 1Department of Physics and Astronomy, Southern Illinois University, Carbondale, Illinois 62901, USA.

Physical Review Letters
|March 5, 2016
PubMed
Summary
This summary is machine-generated.

We introduce assisted coherence distillation, where two parties collaborate to maximize coherence in one system using specific quantum operations. The distillation rate equals the coherence of assistance, offering a new view on von Neumann entropy.

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Area of Science:

  • Quantum Information Science
  • Quantum Thermodynamics
  • Quantum Foundations

Background:

  • Coherence is a key resource in quantum mechanics, essential for quantum computation and information processing.
  • Assisted processes, involving collaboration between multiple systems or parties, are crucial for enhancing quantum tasks.
  • Understanding the limits of coherence generation and manipulation is vital for advancing quantum technologies.

Purpose of the Study:

  • To introduce and analyze the novel task of assisted coherence distillation.
  • To define and characterize 'coherence of assistance' as a fundamental quantity in this process.
  • To explore the connection between coherence distillation, von Neumann entropy, and multipartite quantum systems.

Main Methods:

  • Development of the theoretical framework for assisted coherence distillation.
  • Introduction of local quantum-incoherent operations and classical communication (LQICC) as the operational paradigm.
  • Mathematical characterization of the asymptotic rate of distillation for pure states.

Main Results:

  • The asymptotic rate of assisted coherence distillation for pure states is proven to be equal to the coherence of assistance.
  • Properties of coherence of assistance are derived, analogous to entanglement of assistance.
  • A novel interpretation of von Neumann entropy is proposed: it quantifies the maximum achievable gain in quantum coherence through assistance.

Conclusions:

  • Assisted coherence distillation provides a new perspective on quantifying and generating quantum coherence.
  • The concept of coherence of assistance offers a valuable tool for understanding quantum correlations.
  • The findings have implications for quantum information processing, quantum thermodynamics, and the fundamental understanding of quantum entropy.