在CFD平台软件OpenFOAM上,用数值模拟的方法分析了变截面毛细流道中的毛细流动行为。该数值方法利用流体体积比函数(volume of fluid,VOF)来跟踪流体流动前沿界面,再用连续表面张力模型(continue surface force,CSF)来描述毛细驱动力。...在CFD平台软件OpenFOAM上,用数值模拟的方法分析了变截面毛细流道中的毛细流动行为。该数值方法利用流体体积比函数(volume of fluid,VOF)来跟踪流体流动前沿界面,再用连续表面张力模型(continue surface force,CSF)来描述毛细驱动力。VOF和CSF方法的结合使得毛细驱动力的求解能适应截面的变化。分别用该数值方法和解析方法对变间距平行平板间毛细流动进行了分析,发现两者的分析结果一致性较好。基于VOF和CSF的数值方法有望进一步应用于更复杂流场中的毛细流动分析。展开更多
We propose a more efficient and reliable scheme for transferring quantum states between distant atoms than previous schemes based on resonant atom-cavity interaction.In addition,our system can also be used to implemen...We propose a more efficient and reliable scheme for transferring quantum states between distant atoms than previous schemes based on resonant atom-cavity interaction.In addition,our system can also be used to implement a controlled phase gate with high fidelity.展开更多
We construct a novelΛ-type system via the dressed states formed by the coupling between a superconducting qubit and a transmission line resonator(TLR).Compared with the conventional three-level structure,our model av...We construct a novelΛ-type system via the dressed states formed by the coupling between a superconducting qubit and a transmission line resonator(TLR).Compared with the conventional three-level structure,our model averts the decay of excited states.We choose the two lowest energy dressed states as the logical states.The single qubit quantum gate can be realized by the adiabatic passage and three-step operation method,respectively.Based on realistic parameters,the feasibility of the adiabatic passage method is discussed.Also,we calculate the fidelity(0.9996)of realizing the single qubit gate with the three-step operation method.展开更多
文摘在CFD平台软件OpenFOAM上,用数值模拟的方法分析了变截面毛细流道中的毛细流动行为。该数值方法利用流体体积比函数(volume of fluid,VOF)来跟踪流体流动前沿界面,再用连续表面张力模型(continue surface force,CSF)来描述毛细驱动力。VOF和CSF方法的结合使得毛细驱动力的求解能适应截面的变化。分别用该数值方法和解析方法对变间距平行平板间毛细流动进行了分析,发现两者的分析结果一致性较好。基于VOF和CSF的数值方法有望进一步应用于更复杂流场中的毛细流动分析。
基金Supported by the National Natural Science Foundation of China under Grant Nos 11175033 and 10875020.
文摘We propose a more efficient and reliable scheme for transferring quantum states between distant atoms than previous schemes based on resonant atom-cavity interaction.In addition,our system can also be used to implement a controlled phase gate with high fidelity.
基金Supported by the National Nature Science Foundation of China under Grants Nos 60703100,10775023 and 11175033the Fundamental Research Funds for the Central Universities under Grant No DUT10LK10.
文摘We construct a novelΛ-type system via the dressed states formed by the coupling between a superconducting qubit and a transmission line resonator(TLR).Compared with the conventional three-level structure,our model averts the decay of excited states.We choose the two lowest energy dressed states as the logical states.The single qubit quantum gate can be realized by the adiabatic passage and three-step operation method,respectively.Based on realistic parameters,the feasibility of the adiabatic passage method is discussed.Also,we calculate the fidelity(0.9996)of realizing the single qubit gate with the three-step operation method.
