Quantum optomechanics beyond the quantum coherent oscillation regime
Quantum optomechanics beyond the quantum coherent oscillation regime
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超越量子相干振荡范围的量子光力学
DOI：
10.1364/optica.4.001382
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
W. Bowen
中科院分区：
文献类型：
--
作者：
K. Khosla;G. Brawley;M. Vanner;W. Bowen
与热环境的相互作用使机械振荡器的量子态退相干。当相互作用足够强时，使得在振荡周期内引入多个热声子，就可以防止量子相干振荡。人们普遍认为这排除了广泛的量子协议。在这里，我们引入了一种脉冲光机械协议，该协议允许基态冷却、一般线性量子非破坏测量、光机械状态交换以及量子态准备和断层扫描，而无需量子相干振荡。最后，我们展示了该协议如何打破脉冲力感测的通常热限制。
Interaction with a thermal environment decoheres the quantum state of a mechanical oscillator. When the interaction is sufficiently strong, such that more than one thermal phonon is introduced within a period of oscillation, quantum coherent oscillations are prevented. This is generally thought to preclude a wide range of quantum protocols. Here, we introduce a pulsed optomechanical protocol that allows ground state cooling, general linear quantum non-demolition measurements, optomechanical state swaps, and quantum state preparation and tomography without requiring quantum coherent oscillations. Finally we show how the protocol can break the usual thermal limit for sensing of impulse forces.