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
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.
