Trivedi Rahul, Radulaski Marina, Fischer Kevin A, Fan Shanhui, Vučković Jelena
E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
Phys Rev Lett. 2019 Jun 21;122(24):243602. doi: 10.1103/PhysRevLett.122.243602.
We use the scattering matrix formalism to analyze photon blockade in coherently driven cavity quantum electrodynamics systems with a weak drive. By approximating the weak coherent drive by an input single- and two-photon Fock state, we reduce the computational complexity of the transmission and the two-photon correlation function from exponential to polynomial in the number of emitters. This enables us to easily analyze cavity-based systems containing ∼50 quantum emitters with modest computational resources. Using this approach we study the coherence statistics of photon blockade while increasing the number of emitters for resonant and detuned multiemitter cavity quantum electrodynamics systems-we find that increasing the number of emitters worsens photon blockade in resonant systems, and improves it in detuned systems. We also analyze the impact of inhomogeneous broadening in the emitter frequencies on the photon blockade through this system.
我们使用散射矩阵形式来分析具有弱驱动的相干驱动腔量子电动力学系统中的光子阻塞。通过用输入的单光子和双光子福克态近似弱相干驱动，我们将发射体数量上传输和双光子关联函数的计算复杂度从指数级降低到多项式级。这使我们能够用适度的计算资源轻松分析包含约50个量子发射体的基于腔的系统。使用这种方法，我们研究了光子阻塞的相干统计，同时增加了共振和失谐多发射体腔量子电动力学系统的发射体数量——我们发现增加发射体数量会使共振系统中的光子阻塞恶化，而在失谐系统中则会改善。我们还通过该系统分析了发射体频率的非均匀展宽对光子阻塞的影响。
