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arXiv quant-ph/0102059quant-ph
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对相干态的特征

Signatures of the Pair-Coherent State

A. Gilchrist, W. J. Munro

摘要:

我们详细地讨论了在非简并参量振荡器中考虑退相干时产生成对相干态的可能性。这种状态是预测在瞬态制度中的参数振荡,其中的泵模式被自动消除。检查两个特定的签名以指示感兴趣的状态是否已经生成,即薛定谔猫状态样签名和保真度。在瞬态制度的解决方案揭示了干涉条纹,这是一个薛定谔猫状态的形成指示。保真度表明我们制备的态与理想的对相干态相比的纯度。

英文摘要:

We explore in detail the possibility of generating a pair-coherent state in the non-degenerate parametric oscillator when decoherence is included. Such states are predicted in the transient regime in parametric oscillation where the pump mode is adiabatically eliminated. Two specific signatures are examined to indicate whether the state of interest has been generated, the Schrodinger cat state - like signatures, and the fidelity. Solutions in a transient regime reveal interference fringes which are indicative of the formation of a Schrodinger cat state. The fidelity indicates the purity of our prepared state compared to the ideal pair-coherent state.

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