We propose a new scheme for generating the superposition and entanglement of the coherent states and squeezed states by consid- ering N superconducting charge qubits （or artificial two-level atoms） interacting with ...We propose a new scheme for generating the superposition and entanglement of the coherent states and squeezed states by consid- ering N superconducting charge qubits （or artificial two-level atoms） interacting with photons in a high finesse cavity on a chip, assisted by a strong driving field. By virtue of the parameters of this system, we can generate novel quantum states, for example, multiparty entangled states and Schr6dinger cat states among the superconducting qubits, coherent states and squeezed states of the cavity. These states, whose amplitudes are about two orders greater than those from the atomic quantum electrodynamics in classical cavity, are important for understanding the boundary between quantum and classical behavior and can be utilized in experimental studies on decoherence. This device may be an architecture for future solid-state quantum computation and communication.展开更多
基金supported by the National Natural Science Foundation ofChina (Grant Nos. 11074070, 10774042, 10874235, 10934010, 60978019,10775176, 60525417, and 10774163)the Natural Science Foundation ofHunan Province (Grant No. 09JJ3121)+1 种基金the Key Project of Science andTechnology of Hunan Province (Grant No. 2010FJ2005)the NKBRSFC(Grants Nos. 2006CB921400, 2009CB930704 and 2010CB922904)
文摘We propose a new scheme for generating the superposition and entanglement of the coherent states and squeezed states by consid- ering N superconducting charge qubits （or artificial two-level atoms） interacting with photons in a high finesse cavity on a chip, assisted by a strong driving field. By virtue of the parameters of this system, we can generate novel quantum states, for example, multiparty entangled states and Schr6dinger cat states among the superconducting qubits, coherent states and squeezed states of the cavity. These states, whose amplitudes are about two orders greater than those from the atomic quantum electrodynamics in classical cavity, are important for understanding the boundary between quantum and classical behavior and can be utilized in experimental studies on decoherence. This device may be an architecture for future solid-state quantum computation and communication.
