Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Concurrence of Rank-two Multipartite Quantum States

2-계수 양자상태의 양자얽힘 분석

  • Bae, Joonwoo (Department of Applied Mathematics, Hanyang University (ERICA))
  • 배준우 (한양대학교(에리카) 응용수학과)
  • Received : 2018.03.05
  • Accepted : 2018.03.28
  • Published : 2018.04.25
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Abstract

In this work, we derive a general lower bound to concurrence of an arbitrary mixture of two pure states, that is, rank-two multipartite quantum states. We show that the lower bound can tightly detect entanglement of rank-two states, and also can be implemented experimentally with present-day technologies, i.e. single-copy level measurement and classical post-processing.

본 논문에서는 양자시스템이 두 순수상태가 임의대로 혼합된 상태, 즉 2-계수 양자상태, 에 존재할 때 시스템이 포함하는 양자얽힘의 일반적인 하한값을 유도하고 양자얽힘검증 및 양자상태 분리가능성 판별 방법을 제안한다.

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