We propose an effective method to produce four-qubit x-type entangled states by using flux qubits coupled to an LC circuit which acts as a quantum data bus (QDB).In our scheme,the interaction is mediated by the exchan...We propose an effective method to produce four-qubit x-type entangled states by using flux qubits coupled to an LC circuit which acts as a quantum data bus (QDB).In our scheme,the interaction is mediated by the exchange of virtual rather than real photons because of the large detuning between flux qubits and QDB,and then QDB-induced loss can be effectively avoided.The experimental feasibility of the scheme is also presented.展开更多
In order to find the drag reduction mechanism of surface wettability,some experiments are carried out to research the flow of deionized water through microtubes.The flow rate of liquid through microtubes adsorbing Flu...In order to find the drag reduction mechanism of surface wettability,some experiments are carried out to research the flow of deionized water through microtubes.The flow rate of liquid through microtubes adsorbing Fluoro–Alkyl silanes(FAS)or not are compared.The inner diameters of the microtubes are 100µm,75µm and 50µm,respectively.The relations of shear rate and slip velocity,and shear rate and slip length are discussed.The inner surface wettability of the microtubes changes from hydrophilic at a contact angle of 23°to weak hydrophobic at a contact angle of 107°by adsorbing FAS.The results indicate that the flow rate in microtubes adsorbing FAS is larger than those without FAS,the efficiency of drag reduction if about 13%,the slip velocity near the wall is proportional to the shear rate and the slip length remains invariant for different shear rates in microtubes with different diameters.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 10947017/A05Key Lab of Novel Thin Film Solar Cells(KF200912)+1 种基金Graduates’Innovative Scientific Research Project of Zhejiang Province(2011831)Graduate Innovation Foundation of Wenzhou University(3160601010952).
文摘We propose an effective method to produce four-qubit x-type entangled states by using flux qubits coupled to an LC circuit which acts as a quantum data bus (QDB).In our scheme,the interaction is mediated by the exchange of virtual rather than real photons because of the large detuning between flux qubits and QDB,and then QDB-induced loss can be effectively avoided.The experimental feasibility of the scheme is also presented.
基金Supported by the National Natural Science Foundation of China under Grant Nos.10972199 and 10932010the Natural Science Foundation of Zhejiang Province under Grant No.Y607425.
文摘In order to find the drag reduction mechanism of surface wettability,some experiments are carried out to research the flow of deionized water through microtubes.The flow rate of liquid through microtubes adsorbing Fluoro–Alkyl silanes(FAS)or not are compared.The inner diameters of the microtubes are 100µm,75µm and 50µm,respectively.The relations of shear rate and slip velocity,and shear rate and slip length are discussed.The inner surface wettability of the microtubes changes from hydrophilic at a contact angle of 23°to weak hydrophobic at a contact angle of 107°by adsorbing FAS.The results indicate that the flow rate in microtubes adsorbing FAS is larger than those without FAS,the efficiency of drag reduction if about 13%,the slip velocity near the wall is proportional to the shear rate and the slip length remains invariant for different shear rates in microtubes with different diameters.
