期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 108, 期 25, 页码 10067-10071出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1018839108
关键词
nonlinear optics; quantum optics; linear optics; quantum gates
资金
- Quantum Cybernetics project
- Japan Science and Technology Agency (JST)
- Ministry of Internal Affairs and Communication (MIC)
- Japan Society for the Promotion of Science (JSPS)
- 21st Century Center of Excellence (COE) Program
- Special Coordination Funds for Promoting Science and Technology
- Daiwa Anglo-Japanese Foundation
- European Research Council (ERC)
- Engineering and Physical Sciences Research Council (EPSRC)
- Leverhulme Trust
- Royal Society
- Engineering and Physical Sciences Research Council [EP/F010524/1] Funding Source: researchfish
- EPSRC [EP/F010524/1] Funding Source: UKRI
- Grants-in-Aid for Scientific Research [21102007, 23244079, 21540409] Funding Source: KAKEN
Quantum information science addresses how uniquely quantum mechanical phenomena such as superposition and entanglement can enhance communication, information processing, and precision measurement. Photons are appealing for their low-noise, light-speed transmission and ease of manipulation using conventional optical components. However, the lack of highly efficient optical Kerr nonlinearities at the single photon level was a major obstacle. In a breakthrough, Knill, Laflamme, and Milburn (KLM) showed that such an efficient nonlinearity can be achieved using only linear optical elements, auxiliary photons, and measurement [Knill E, Laflamme R, Milburn GJ (2001) Nature 409:46-52]. KLM proposed a heralded controlled-NOT (CNOT) gate for scalable quantum computation using a photonic quantum circuit to combine two such nonlinear elements. Here we experimentally demonstrate a KLM CNOT gate. We developed a stable architecture to realize the required four-photon network of nested multiple interferometers based on a displaced-Sagnac interferometer and several partially polarizing beamsplitters. This result confirms the first step in the original KLM recipe for all-optical quantum computation, and should be useful for on-demand entanglement generation and purification. Optical quantum circuits combining giant optical nonlinearities may find wide applications in quantum information processing, communication, and sensing.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据