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Simultaneous observation of particle and wave behaviors of entangled photons

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ABSTRACT

We theoretically study wave-particle duality of two entangled photons in the spirit of quantum version of delayed-choice experiments using Hadamard gate controlled by the quantum state of an ancilla and show that the two photons may globally exhibit particle-like, wave-like or simultaneously both particle-like and wave-like behavior. We prove that the obtained results cannot be satisfactorily explained by any hidden-variable theory. We also propose an efficient and experimentally feasible scheme without using any ancilla and controlled-gates to directly (i.e., without postselection) observe the two-photon wave-particle superposed state as well as the continuous transition of their behavior between wave-like one and particle-like one.

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An experimental scheme for demonstrating both wave and particle behaviors of two photons A and A′ initially being in polarization-entanglement.After the PBS1 and PBS3, the polarization-entanglement of the photons is transformed to path-entanglement. φ1 and φ2 are the phase shifters. Π(α) is the polarizer inserted in path 0 where an additional PBS, i.e., PBS2, and the corresponding detectors D2 are also placed. HWP1 and HWP2 denote the half-wave plates. The paths 0, 1 and 0′, 1′ are combined by BBS1 and BBS2, respectively.
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f2: An experimental scheme for demonstrating both wave and particle behaviors of two photons A and A′ initially being in polarization-entanglement.After the PBS1 and PBS3, the polarization-entanglement of the photons is transformed to path-entanglement. φ1 and φ2 are the phase shifters. Π(α) is the polarizer inserted in path 0 where an additional PBS, i.e., PBS2, and the corresponding detectors D2 are also placed. HWP1 and HWP2 denote the half-wave plates. The paths 0, 1 and 0′, 1′ are combined by BBS1 and BBS2, respectively.

Mentions: In this section, we propose an experimentally feasible scheme to implement the simultaneous observation of both aspects of wave and particle of two entangled photons. Our scheme is shown in Fig. 2, where two photons A and A′ are prepared initially in the polarization entanglement state as


Simultaneous observation of particle and wave behaviors of entangled photons
An experimental scheme for demonstrating both wave and particle behaviors of two photons A and A′ initially being in polarization-entanglement.After the PBS1 and PBS3, the polarization-entanglement of the photons is transformed to path-entanglement. φ1 and φ2 are the phase shifters. Π(α) is the polarizer inserted in path 0 where an additional PBS, i.e., PBS2, and the corresponding detectors D2 are also placed. HWP1 and HWP2 denote the half-wave plates. The paths 0, 1 and 0′, 1′ are combined by BBS1 and BBS2, respectively.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5304183&req=5

f2: An experimental scheme for demonstrating both wave and particle behaviors of two photons A and A′ initially being in polarization-entanglement.After the PBS1 and PBS3, the polarization-entanglement of the photons is transformed to path-entanglement. φ1 and φ2 are the phase shifters. Π(α) is the polarizer inserted in path 0 where an additional PBS, i.e., PBS2, and the corresponding detectors D2 are also placed. HWP1 and HWP2 denote the half-wave plates. The paths 0, 1 and 0′, 1′ are combined by BBS1 and BBS2, respectively.
Mentions: In this section, we propose an experimentally feasible scheme to implement the simultaneous observation of both aspects of wave and particle of two entangled photons. Our scheme is shown in Fig. 2, where two photons A and A′ are prepared initially in the polarization entanglement state as

View Article: PubMed Central - PubMed

ABSTRACT

We theoretically study wave-particle duality of two entangled photons in the spirit of quantum version of delayed-choice experiments using Hadamard gate controlled by the quantum state of an ancilla and show that the two photons may globally exhibit particle-like, wave-like or simultaneously both particle-like and wave-like behavior. We prove that the obtained results cannot be satisfactorily explained by any hidden-variable theory. We also propose an efficient and experimentally feasible scheme without using any ancilla and controlled-gates to directly (i.e., without postselection) observe the two-photon wave-particle superposed state as well as the continuous transition of their behavior between wave-like one and particle-like one.

No MeSH data available.


Related in: MedlinePlus