Non-Gaussian quantum states of a multimode light field

被引:106
|
作者
Ra, Young-Sik [1 ,2 ]
Dufour, Adrien [1 ]
Walschaers, Mattia [1 ]
Jacquard, Clement [1 ]
Michel, Thibault [1 ,3 ]
Fabre, Claude [1 ]
Treps, Nicolas [1 ]
机构
[1] Sorbonne Univ, CNRS, ENS PSL, Res Univ,Coll France,Lab Kastler Brossel, Paris, France
[2] Korea Adv Inst Sci & Technol, Dept Phys, Daejeon, South Korea
[3] Australian Natl Univ, Dept Quantum Sci, Ctr Quantum Computat & Commun Technol, Canberra, ACT, Australia
基金
欧盟地平线“2020”; 新加坡国家研究基金会;
关键词
HYBRID ENTANGLEMENT; CRITERION;
D O I
10.1038/s41567-019-0726-y
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Advanced quantum technologies require scalable and controllable quantum resources(1,2). Gaussian states of multimode light, such as squeezed states and cluster states, are scalable quantum systems(3-5), which can be generated on demand. However, non-Gaussian features are indispensable in many quantum protocols, especially to reach a quantum computational advantage(6). Embodying non-Gaussianity in a multimode quantum state remains a challenge as non-Gaussian operations generally cannot maintain coherence among multiple modes. Here, we generate non-Gaussian quantum states of a multimode light field by removing a single photon in a mode-selective manner from a Gaussian state(7). To highlight the potential for continuous-variable quantum technologies, we first demonstrated the capability to generate negativity of the Wigner function in a controlled mode. Subsequently, we explored the interplay between non-Gaussianity and quantum entanglement and verify a theoretical prediction(8) about the propagation of non-Gaussianity along the nodes of photon-subtracted cluster states. Our results demonstrate large-scale non-Gaussianity with great flexibility along with an ensured compatibility with quantum information protocols. This range of features makes our approach ideal to explore the physics of non-Gaussian entanglement(9,10) and to develop quantum protocols, which range across quantum computing(11,12), entanglement distillation(13) and quantum simulations(14). Continuous-variables quantum information processing requires non-Gaussian states and operations. The generation of non-Gaussian quantum states of a multimode field is now reported through a mode-selective photon-subtraction scheme
引用
收藏
页码:144 / +
页数:9
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