한국광학회지 (Korean Journal of Optics and Photonics)

  • 제29권2호
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  • Pages.64-69
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  • 2018
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  • 1225-6285(pISSN)
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  • 2287-321X(eISSN)
한국광학회 (Optical Society of Korea)
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2-계수 양자상태의 양자얽힘 분석

Concurrence of Rank-two Multipartite Quantum States

  • 배준우 (한양대학교(에리카) 응용수학과)
  • Bae, Joonwoo (Department of Applied Mathematics, Hanyang University (ERICA))
  • 투고 : 2018.03.05
  • 심사 : 2018.03.28
  • 발행 : 2018.04.25
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⟨ 이전 논문 다음 논문 ⟩

초록

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.

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.

키워드

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