예고된 단일 광자 광원을 이용한 레겟-가르그 부등식 모사
Simulation of Leggett-Garg Inequalities Using a Heralded-single-photon Source
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
본 논문에서는 주기적 분극된 비선형 결정(periodically poled potassium titanyl phosphate; PPKTP)에서 자발매개하향변환 (spontaneous parametric down conversion; SPDC)과정으로 생성된 예고된 단일 광자 광원을 이용하여 레겟-가르그 부등식(LeggettGarg inequality; LGI)의 위배를 실험적으로 모사하였다. 생성된 광자의 편광 방향에 따라서 편광된 광자 수를 측정하여 n-측정수에 따른 레겟-가르그 부등식을 모사하였다. 단일 광자의 편광 기반 LGI에 대한 실험 결과는 이론적인 계산 결과와 일치하는 것을 확인하였다.
Abstract
We have experimentally simulated the violation of the Leggett-Garg inequality (LGI) using a heralded-single-photon source via spontaneous parametric down-conversion (SPDC) in a periodically poled potassium titanyl phosphate (PPKTP) crystal. We measured the polarization fringe as a function of the angle of the linear polarization of the photons, and analyzed the LGI according to n measurement. Simulation results for LGI based on the polarization of the heralded single photon were in good agreement with theoretical calculations.
참고문헌 (10)
- A. Einstein, "Can quantummechanical description of physical reality be considered complete?", Phys. Rev, 47, pp.777~780 (1935)
- J. S. Bell, "On the Einstein Podolsky Rosen paradox", Physics, 1, pp.195~200 (1964)
- W. Rosenfeld, "Event-ready Bell test using entangled atoms simultaneously closing detection and locality loopholes", Phys. Rev. Lett, 119, pp.010402~ (2017)
- J. Park, "Polarization-entangled photons from a warm atomic ensemble using a Sagnac interferometer", Phys. Rev. Lett, 122, pp.143601~ (2019)
- E. Schrödinger, "Die gegenwärtige Situation in der Quantenmechanik", Naturwissenschaften, 23, pp.823~828 (1935)
- A. J. Leggett, "Quantum mechanics versus macroscopic realism: is the flux there when nobody looks?", Phys. Rev. Lett, 54, pp.857~860 (1985)
- R. F. Werner, "Quantum states with Einstein-Podolsky-Rosen correlations admitting a hidden-variable model", Phys. Rev. A, 40, pp.4277~4281 (1989)
- M. E. Goggin, "Violation of the Leggett–Garg inequality with weak measurements of photons", Proc. Natl. Acad. Sci. U. S. A, 108, pp.1256~1261 (2011)
- C. Emary, "Leggett–Garg inequalities", Rep. Prog. Phys, 77, pp.016001~ (2014)
- Y. Aharonov, "Properties of a quantum system during the time interval between two measurements", Phys. Rev. A, 41, pp.11~20 (1990)