| AKM24C-EFBNR-01 AKM24D-ACBNR-00 |
 |
價格：88 元(人民幣) | 產(chǎn)地：本地 |
| 最少起訂量：1件 | 發(fā)貨地：泉州 | |
| 上架時間：2017-07-26 10:33:14 | 瀏覽量：37 | |
深圳長欣自動化設(shè)備有限公司（泉州辦）
 |
||
| 經(jīng)營模式：貿(mào)易公司 | 公司類型：私營合伙企業(yè) | |
| 所屬行業(yè)：PLC控制系統(tǒng) | 主要客戶：全國 | |
 在線咨詢  |
||
| 聯(lián)系人:吳工 (先生) | 手機(jī):15359571759 |
電話: |
傳真: |
| 郵箱:2937878768@qq.com | 地址:福建泉州市鯉城區(qū)南益鯉景灣三期B棟915室 |
|
（DCS系統(tǒng)）和（機(jī)器人系統(tǒng)）及（大型伺服控制系統(tǒng)）備件大賣！叫賣！特賣！賣賣賣！ HEFEI - Chinese scientists have made another breakthrough in quantum communication, demonstrating long-distance free-space quantum key distribution during daylight. In the past, long-distance free-space quantum communication experiments could only be performed at night, because sunlight, or sunlight noise, prohibits quantum communication in transmission under conditions of high channel loss over long distances. Therefore, the world's first quantum satellite, Quantum Experiments at Space Scale (QUESS) launched by China in 2016, can only send photons at night, and it takes at least three days for QUESS to cover all ground stations around the Earth. A team from the University of Science and Technology of China led by Pan Jianwei, an academician with the Chinese Academy of Sciences, has overcome the sunlight noise issue and demonstrated free-space quantum key distribution over 53 km during the day. Pan's team chose a wavelength of 1,550 nanometers and developed free-space single-mode fibre-coupling technology and ultra-low-noise upconversion single-photon detectors to achieve the daytime distribution. The new technology was announced on Monday in the journal of Nature Photonics. "Our experiment has proved the feasibility of satellite-based quantum in daylight, and laid a foundation for a satellite-constellation-based global quantum network," said Pan. Quantum communication is ultra-secure as a quantum photon can neither be separated nor duplicated. Accordingly, it is impossible to wiretap, intercept or crack information it transmits. China is striving to set up the first-ever global quantum communication network by around 2030, through linking a satellite constellation consisting of dozens of quantum satellites and ground-based quantum communication networks. |
| 版權(quán)聲明：以上所展示的信息由會員自行提供，內(nèi)容的真實(shí)性、準(zhǔn)確性和合法性由發(fā)布會員負(fù)責(zé)。機(jī)電之家對此不承擔(dān)任何責(zé)任。 友情提醒：為規(guī)避購買風(fēng)險，建議您在購買相關(guān)產(chǎn)品前務(wù)必確認(rèn)供應(yīng)商資質(zhì)及產(chǎn)品質(zhì)量。 |
機(jī)電之家網(wǎng) - 機(jī)電行業(yè)權(quán)威網(wǎng)絡(luò)宣傳媒體
關(guān)于我們 | 聯(lián)系我們 | 廣告合作 | 付款方式 | 使用幫助 | 會員助手 | 免費(fèi)鏈接Copyright 2025 jdzj.com All Rights Reserved??技術(shù)支持：機(jī)電之家 服務(wù)熱線：0571-87774297
網(wǎng)站經(jīng)營許可證:浙B2-20080178
