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Trapped Ion Quantum Computing Superconducting Qubits

Quantum macroscopicity measure for arbitrary spin systems and its application to quantum phase transitions

arXiv
Authors: Chae-Yeun Park, Minsu Kang, Chang-Woo Lee, Jeongho Bang, Seung-Woo Lee, Hyunseok Jeong

Year

2015

Paper ID

26784

Status

Preprint

Abstract Read

~2 min

Abstract Words

93

Citations

N/A

Abstract

We explore a previously unknown connection between two important problems in physics, i.e., quantum macroscopicity and the quantum phase transition. We devise a general and computable measure of quantum macroscopicity that can be applied to arbitrary spin states. We find that a macroscopic quantum superposition of an extremely large size arises during the quantum phase transition of the transverse Ising model in contrast to some seeming macroscopic quantum phenomena such as superconductivity, superfluidity and Bose-Einstein condensates. Our result may be an important step forward in understanding macroscopic quantum properties of many-body systems.

Why This Paper Matters

  • This paper contributes to the Superconducting Qubits research area in the Quantum Articles archive.
  • It adds a 2015 reference point for readers tracking recent quantum research.
  • We explore a previously unknown connection between two important problems in physics, i.e., quantum macroscopicity and the quantum phase transition.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1510.02876 [2] arXiv https://arxiv.org/abs/1510.02876 [3] Publisher https://arxiv.org/abs/1510.02876

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