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

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Published on: June 8, 2018

Quantification of macroscopic quantum superpositions within phase space.

Chang-Woo Lee1, Hyunseok Jeong

  • 1Center for Macroscopic Quantum Control & Department of Physics and Astronomy, Seoul National University, Seoul, Korea.

Physical Review Letters
|June 28, 2011
PubMed
Summary
This summary is machine-generated.

We introduce a new method to measure macroscopic quantum superpositions by analyzing quantum states in phase space. This approach quantifies both quantum coherence and system size, applicable to all quantum states.

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Area of Science:

  • Quantum Physics
  • Quantum Information Science

Background:

  • Macroscopic quantum superpositions are fundamental to quantum mechanics.
  • Quantifying these superpositions is crucial for understanding quantum phenomena and developing quantum technologies.

Purpose of the Study:

  • To propose a novel, generalizable measure for quantifying macroscopic quantum superpositions.
  • To simultaneously assess quantum coherence and the effective size of quantum systems.

Main Methods:

  • Development of a new measure based on phase-space structures of quantum states.
  • Analysis of analytical and algebraic properties of the proposed measure.

Main Results:

  • The proposed measure effectively quantifies both quantum coherence and system size.
  • The measure demonstrates excellent analytical and algebraic properties.
  • It is applicable to all multipartite and mixed quantum states in phase space.

Conclusions:

  • The novel measure provides a comprehensive tool for characterizing macroscopic quantum superpositions.
  • Its generality and inclusivity make it valuable for diverse quantum state analyses.
  • This work advances the understanding and quantification of complex quantum states.