Ultimate On-Chip Quantum Amplifier
Ultimate On-Chip Quantum Amplifier
复制标题
DOI：
10.1103/physrevlett.104.183603
复制
发表时间：
2010-05-07
影响因子：
8.6
通讯作者：
Tsai, J. S.
中科院分区：
文献类型：
--
作者：
Astafiev, O. V.;Abdumalikov, A. A., Jr.;Tsai, J. S.
我们报道了开放一维空间中单个人工原子对电磁波的放大。我们的三能级人造原子——超导量子电路——耦合到传输线上，呈现出开放空间中自然原子的模拟。该系统是最基本的量子放大器，其增益受自发发射机制的限制。噪声性能是由自发发射光谱中显示的量子噪声决定的，我们的实验也对其进行了表征。
We report amplification of electromagnetic waves by a single artificial atom in open 1D space. Our three-level artificial atom-a superconducting quantum circuit-coupled to a transmission line presents an analog of a natural atom in open space. The system is the most fundamental quantum amplifier whose gain is limited by a spontaneous emission mechanism. The noise performance is determined by the quantum noise revealed in the spectrum of spontaneous emission, also characterized in our experiments.