Metasurfaces can precisely manipulate the amplitude,phase,and polarization of incident light through subwavelength structures,greatly advancing the quantum meta-holographic imaging.However,the current methods of using...Metasurfaces can precisely manipulate the amplitude,phase,and polarization of incident light through subwavelength structures,greatly advancing the quantum meta-holographic imaging.However,the current methods of using quantum holography only control either the amplitude or the phase on the imaging plane,so the resulted scalar holography without the polarization distribution has limited imaging channels.Here,the vectorial meta-holography using entangled signal-idler photon pairs is experimentally demonstrated to realize remotely controlled multi-channel quantum imaging.By simultaneous control of the amplitude ratio between two crosspolarization holographic images and their phase difference on the image plane,the polarization distribution accordingly changes with the incident polarization state.The accurate correspondence ensures the correct reconstruction of 32 incident polarization states with an average fidelity up to 94.78%.This enables entangled idler photons to remotely control the holographic images reconstructed by the entangled signal photons,where the signal-to-noise ratio is as high as 10.78 dB,even for maximally mixed quantum states.This vectorial meta-holography using entangled states has a larger polarization state information capacity and will facilitate miniaturized quantum imaging and efficient quantum state tomography.展开更多
Compact controlled-NOT(CNOT)gates are essential for achieving large-scale quantum information processing.Recently,metasurfaces have been emerging as a promising miniaturized platform for quantum optics thanks to their...Compact controlled-NOT(CNOT)gates are essential for achieving large-scale quantum information processing.Recently,metasurfaces have been emerging as a promising miniaturized platform for quantum optics thanks to their advanced light field manipulation capability and subwavelength thickness.Here we report,for the first time,to our knowledge,the experimental demonstration of a quantum CNOT gate realized with a single-layer Pancharatnam–Berry phase-based dielectric metasurface.The metasurface completes the functions of three beam splitters,reducing the thickness of the logic gate to the subwavelength scale.The truth table fidelity reaches as high as 94.7%and state fidelities of the generated maximally entangled Bell states exceed 80%.This provides an ultrathin device for quantum information processing and holds promise for advancing quantum technology.展开更多
基金funded by National Natural Science Foundation of China(Grants No.12134001,No.11527901,and No.61590933)National Key Research and Development Program of China(Grants No.2018YFB1107205)+2 种基金China National Postdoctoral Program for Innovative Talents(Grant No.BX20240012)Joint Fund for Equipment Pre-research Space Science and Technology(Grant No.6141B06140601)the Innovation Program for Quantum Science and Technology(Grant No.2021ZD0301503).
文摘Metasurfaces can precisely manipulate the amplitude,phase,and polarization of incident light through subwavelength structures,greatly advancing the quantum meta-holographic imaging.However,the current methods of using quantum holography only control either the amplitude or the phase on the imaging plane,so the resulted scalar holography without the polarization distribution has limited imaging channels.Here,the vectorial meta-holography using entangled signal-idler photon pairs is experimentally demonstrated to realize remotely controlled multi-channel quantum imaging.By simultaneous control of the amplitude ratio between two crosspolarization holographic images and their phase difference on the image plane,the polarization distribution accordingly changes with the incident polarization state.The accurate correspondence ensures the correct reconstruction of 32 incident polarization states with an average fidelity up to 94.78%.This enables entangled idler photons to remotely control the holographic images reconstructed by the entangled signal photons,where the signal-to-noise ratio is as high as 10.78 dB,even for maximally mixed quantum states.This vectorial meta-holography using entangled states has a larger polarization state information capacity and will facilitate miniaturized quantum imaging and efficient quantum state tomography.
基金National Natural Science Foundation of China(12134001,11527901,61590933)National Key Research and Development Program of China(2018YFB1107205)Innovation Program for Quantum Science and Technology(2021ZD0301500)。
文摘Compact controlled-NOT(CNOT)gates are essential for achieving large-scale quantum information processing.Recently,metasurfaces have been emerging as a promising miniaturized platform for quantum optics thanks to their advanced light field manipulation capability and subwavelength thickness.Here we report,for the first time,to our knowledge,the experimental demonstration of a quantum CNOT gate realized with a single-layer Pancharatnam–Berry phase-based dielectric metasurface.The metasurface completes the functions of three beam splitters,reducing the thickness of the logic gate to the subwavelength scale.The truth table fidelity reaches as high as 94.7%and state fidelities of the generated maximally entangled Bell states exceed 80%.This provides an ultrathin device for quantum information processing and holds promise for advancing quantum technology.
