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arXiv 2504.02444quant-ph
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作为量子信息处理资源的等谱振子

Isospectral oscillators as a resource for quantum information processing

Abdelatif Chabane, Sidali Mohammdi, Abdelhakim Gharbi, Matteo G. A. Paris

AI总结:

研究超对称框架下与谐振子等谱的非谐变形振子势,量化其非高斯性与非经典性,并利用量子估计理论确定最优测量策略,证明其可作为连续变量量子信息处理的潜在资源平台。

摘要:

我们研究与谐振子等谱的量子系统,如超对称量子力学框架中的系统,将其作为连续变量量子信息的潜在资源。这些变形振子势与平移谐振子共享等间距的能级,但显著不同之处在于它们是非谐的。因此,它们的基态和热平衡态不再是高斯态,并展现出非经典性质。我们量化了其非高斯性,并使用多种测度评估了其非经典性,包括正交压缩、光子数压缩、Wigner函数负性以及正交相干标度。此外,我们运用量子估计理论确定最优测量策略,并为推断变形参数建立最终精度界限。研究结果表明,与谐振子等谱的量子系统可能成为连续变量量子信息的有前景的平台。进而,可获得非高斯和非经典的稳态,且这些特征在非零温度下依然存在。

英文摘要:

We address quantum systems isospectral to the harmonic oscillator, as those found within the framework of supersymmetric quantum mechanics, as potential resources for continuous variable quantum information. These deformed oscillator potentials share the equally spaced energy levels of the shifted harmonic oscillator but differ significantly in that they are non-harmonic. Consequently, their ground states and thermal equilibrium states are no longer Gaussian and exhibit non-classical properties. We quantify their non-Gaussianity and evaluate their non-classicality using various measures, including quadrature squeezing, photon number squeezing, Wigner function negativity, and quadrature coherence scale. Additionally, we employ quantum estimation theory to identify optimal measurement strategies and establish ultimate precision bounds for inferring the deformation parameter. Our findings prove that quantum systems isospectral to the harmonic oscillator may represent promising platforms for quantum information with continuous variables. In turn, non-Gaussian and non-classical stationary states may be obtained and these features persist at non-zero temperature.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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