论文标题
通过对田间看不见的量子的时间调节，从空腔中的真空中产生光子
Generation of photons from vacuum in cavity via time-modulation of a qubit invisible to the field
论文作者
论文摘要
由于量子系统的时间调制，我们提出了一种从真空生成光子的方案，该量子系统通过某些Ancilla量子子系统间接耦合到腔场。我们考虑将调制应用于人造2级原子（我们称为t Qubit）时的最简单情况，而Ancilla是通过偶极相互作用耦合到腔和T Qubit的固定量子。我们发现，即使在与Ancilla和Favity的T Q Qubit远远不相差的情况下，只要其裸露的调制频率被正确调节，就可以从系统基态下产生少量光子的三方纠缠状态。我们通过数字模拟来证明我们的近似分析结果，并表明在存在共同耗散机制的情况下，来自真空的光子持续存在。
We propose a scheme for generation of photons from vacuum due to time-modulation of a quantum system coupled indirectly to the cavity field through some ancilla quantum subsystem. We consider the simplest case when the modulation is applied to an artificial 2-level atom (we call t-qubit), while the ancilla is a stationary qubit coupled via the dipole interaction both to the cavity and t-qubit. We find that tripartite entangled states with a small number of photons can be generated from the system ground state under resonant modulations, even when the t-qubit is far detuned from both the ancilla and the cavity, provided its bare and modulation frequencies are properly adjusted as function of other system parameters. We attest our approximate analytic results by numeric simulations and show that photon generation from vacuum persists in the presence of common dissipation mechanisms.
