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Quantum Coherence Control at Temperatures up to 1400 K
Nano Letters ( IF 9.6 ) Pub Date : 2024-11-11 , DOI: 10.1021/acs.nanolett.4c04359
Jing-Wei Fan, Shuai-Wei Guo, Chao Lin, Ning Wang, Gang-Qin Liu, Quan Li, Ren-Bao Liu

Coherent quantum control at high temperatures is important for expanding the quantum world and is useful for applying quantum technologies to realistic environments. Quantum control of spins in diamond has been demonstrated near 1000 K, with the spins polarized and read out at room temperature and controlled at elevated temperatures by rapid heating and cooling. Further increase of the working temperature is challenging due to fast spin relaxation in comparison with the heating and cooling rates. Here we significantly improve the heating and cooling rates by using reduced graphene oxide as the laser absorber and heat drain and hence realize coherent quantum operation at up to 1400 K, which is higher than the Curie temperatures of all known materials. This work facilitates the use of diamond sensors to study a wide range of magnetic effects in the high-temperature regime, such as thermoremanent magnetism and magnetic shape memory effects.

中文翻译:


温度高达 1400 K 的量子相干控制



高温下的相干量子控制对于扩展量子世界非常重要,并且对于将量子技术应用于现实环境非常有用。金刚石中自旋的量子控制已在 1000 K 附近得到证明,自旋在室温下极化并读出,并在高温下通过快速加热和冷却进行控制。由于与加热和冷却速率相比,快速旋转松弛,因此进一步提高工作温度具有挑战性。在这里,我们通过使用还原的氧化石墨烯作为激光吸收器和散热装置,显著提高了加热和冷却速率,从而实现了高达 1400 K 的相干量子操作,这高于所有已知材料的居里温度。这项工作有助于使用金刚石传感器来研究高温状态下的各种磁效应,例如热剩磁和磁性形状记忆效应。
更新日期:2024-11-11
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