量子位元
物理
超导电性
连贯性(哲学赌博策略)
量子信息
量子
原子物理学
量子纠缠
Atom(片上系统)
超导量子计算
超精细结构
量子技术
微电子
量子计算机
凝聚态物理
量子力学
光电子学
开放量子系统
计算机科学
嵌入式系统
作者
Simon Bernon,H. Hattermann,Daniel Bothner,M. Knufinke,P. Weiss,Florian Jessen,Daniel Cano,M. Kemmler,Reinhold Kleiner,Dieter Koelle,József Fortágh
摘要
The coherence of quantum systems is crucial to quantum information processing. While it has been demonstrated that superconducting qubits can process quantum information at microelectronics rates, it remains a challenge to preserve the coherence and therefore the quantum character of the information in these systems. An alternative is to share the tasks between different quantum platforms, e.g. cold atoms storing the quantum information processed by superconducting circuits. In our experiment, we characterize the coherence of superposition states of 87Rb atoms magnetically trapped on a superconducting atom-chip. We load atoms into a persistent-current trap engineered in the vicinity of an off-resonance coplanar resonator, and observe that the coherence of hyperfine ground states is preserved for several seconds. We show that large ensembles of a million of thermal atoms below 350 nK temperature and pure Bose-Einstein condensates with 3.5 x 10^5 atoms can be prepared and manipulated at the superconducting interface. This opens the path towards the rich dynamics of strong collective coupling regimes.
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