在腔QED系统中，我们提出一种基于腔模压缩态实现多量子比特平衡Dicke态的方案。此方案最后利用对腔模的真空状态检测确切实现平衡对称Dicke态，由于最后腔模检测需为真空态，腔模－原子的相互作用过程可以通过虚激发过程实现。因此，该方案中纠缠态保真度对实验参数的涨落不敏感。原则上该方案可以扩展到任意偶数个原子相互作用的情况。%We propose a scheme for realizing balance symmetric Dicke states of multi-qubits via squeezed vacuum state in cavity QED .In the scheme the final states of the cavity modes are detected for generation of the balance symmetric Dicke states .Due to the postselection of the detected cavity mode state , the interaction between cavity mode and atoms can be realized through the virtual excitation process .As a result,the fidelity of the scheme is not sensitive to the fluctuation of the experimental parameters .In principle , the scheme can be extended to the case of any even number of atom Dicke states .
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