论文标题
拉姆西区的热力学
Thermodynamics of the Ramsey Zone
论文作者
论文摘要
我们进行了一项有关热力学特性的研究，作为熵和热量$ j_ {q} $和工作$ j_ {w} $通量涉及的拉姆西区域，即，在低质量因子腔体内的模式字段，其行为经典，并促进了原子状态的旋转。仅关注原子动态，我们在这里表明$ j_ {w} $在原子状态发展保持其最大纯度时占主导地位，如von Neumann熵所计算的，在这种情况下，旋转成功地应用了。另一方面，$ j_ {q} $是当原子状态与空腔场模式状态的纠缠而不再纯净的数量。我们用驱动强度，原子场耦合和空腔场耗散率来描述这些极限，并根据热量和工作通量来解释量子到古典的过渡。 Besides, we show that for a driven-dissipative cavity mode to work out as a Ramsey zone (classical field), a very large amount of photons, of the order of $10^{6}$, need to cross the leaky cavity, which explains the classical behavior of the intra-cavity mode field even though, on average, it has a number of photons of the order of unity [Phys.莱特牧师。 82，4737（1999）]
We carry out a study on thermodynamics properties as entropy and heat $J_{Q}$ and work $J_{W}$ fluxes involved in a Ramsey zone, i.e., a mode field inside a low quality factor cavity that behaves classically and promotes rotations on atomic states. Focusing on the atomic dynamic only, here we show that $J_{W}$ predominates when the atomic state evolves maintaining its maximum purity, as computed by von Neumann entropy, in which case the rotation is successfully applied. On the other hand, $J_{Q}$ is the quantity that stands out when the atomic state ceases to be pure due to its entanglement with the cavity field mode state. We describe those limits in terms of the driving strength, the atom-field coupling and the cavity field dissipation rate, and interpret the quantum-to-classical transition in light of the heat and work fluxes. Besides, we show that for a driven-dissipative cavity mode to work out as a Ramsey zone (classical field), a very large amount of photons, of the order of $10^{6}$, need to cross the leaky cavity, which explains the classical behavior of the intra-cavity mode field even though, on average, it has a number of photons of the order of unity [Phys. Rev. Lett. 82, 4737 (1999)]
