Interference-induced enhancement of field entanglement in a microwave-driven V-type single-atom laser
Interference-induced enhancement of field entanglement in a microwave-driven V-type single-atom laser
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微波驱动V型单原子激光器中场纠缠的干涉诱导增强
DOI：
10.2478/s11534-014-0510-7
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发表时间：
2014
影响因子：
--
通讯作者：
Lee RK
中科院分区：
文献类型：
--
作者：
Yang Wen-Xing;Chen Ai-Xi;Zha TT;Bai Y;Lee RK
利用微波场驱动上激发态之间的超精细跃迁，我们证明了在双谐振腔中囚禁的V型三能级原子中产生双模连续变量(CV)纠缠。通过对系统动力学的数值模拟，我们的结果表明，即使在原子弛豫和腔损耗存在的情况下，也可以产生平均光子数较大的CV纠缠。更有趣的是，我们发现由于两个原子衰变通道之间存在完美的自发干涉，纠缠强度和纠缠周期可以随着原子弛豫度的增加而显著增强。此外，我们还表明，通过调节自发干涉的强度和腔场的失谐可以有效地控制纠缠。
We demonstrate the generation of two-mode continuous-variable (CV) entanglement in a V-type three-level atom trapped in a doubly resonant cavity using a microwave field driving a hyperfine transition between two upper excited states. By numerically simulating the dynamics of this system, our results show that the CV entanglement with large mean number of photons can be generated even in presence of the atomic relaxation and cavity losses. More interestingly, it is found that the intensity and period of entanglement can be enhanced significantly with the increasing of the atomic relaxation due to the existence of the perfect spontaneously generated interference between two atomic decay channels. Moreover, we also show that the entanglement can be controlled efficiently by tuning the intensity of spontaneously generated interference and the detuning of the cavity field.