论文标题
在三分之一系统中的集体状态激发
Excitation of the collective states in a three-qubit system
论文作者
论文摘要
在本文中，我们提出了实验可实现的方法来表征线性链中Qubit的集体状态。我们研究了三个相互作用的量子位嵌入一维波指导中的单光子脉冲吸收的时间动力学。进行数值模拟的高斯形脉冲，具有不同的频率引导和量子位之间的相互作用参数。研究了每个量子的激发概率的动态行为。结果表明，当外部激发的频率与系统的激发频率重合时，可以达到量子量激发的最大概率振幅。在这种情况下，链中每个Qubit的概率幅度的大小与该Qubit对系统的相应集体状态的贡献明确相关，并且这些振幅的衰减取决于与Qubit与波子光场的相互作用的谐振宽度所产生的共振宽度。因此，我们表明脉冲谐波探针可用于表征一维Qubit链中集体状态的能量，宽度和波形。
In the present paper, we have proposed the experimentally achievable method for the characterization of the collective states of qubits in a linear chain. We study temporal dynamics of absorption of a single-photon pulse by three interacting qubits embedded in a one-dimensional waveguide. Numerical simulations were performed for a Gaussian-shaped pulse with different frequency detunings and interaction parameters between qubits. The dynamic behavior of the excitation probability for each qubit is investigated. It was shown that the maximum probability amplitudes of excitation of qubits are reached when the frequency of external excitation coincides with the frequency of excitation of the a corresponding eigenstate of the system. In this case, the the magnitude of the probability amplitude of each qubit in the chain unambiguously correlates with the contribution of this qubit to the corresponding collective state of the system, and the decay of these amplitudes are determined by the resonance width arising from the interaction of the qubit with the photon field of the waveguide. Therefore, we show that the pulsed harmonic probe can be used for the characterization of the energies, widths, and the wavefunctions of the collective states in a one-dimensional qubit chain.
