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arXiv 1407.2658quant-phcond-mat.stat-mechhep-th
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从局域数据重建量子态

Reconstructing quantum states from local data

Brian Swingle, Isaac H. Kim

摘要:

我们考虑从局域数据重建全局量子态的问题。由于重建问题一般有多个解,我们认为最大全局熵的重建状态与局部数据一致。我们证明了局域哈密顿量的唯一基态被精确地重构为最大熵态。更一般地说,我们表明,如果所讨论的状态是一个本地哈密顿与退化空间的本地不可区分的基态的基态,那么最大熵状态接近的基态投影仪。我们还表明,局部重建是可能的局部哈密顿热态。最后,我们讨论了一个过程,以证明重建的状态是接近真实的全局状态。我们把我们重建的最大熵态的熵称为“重建熵”,并在全息对偶的背景下讨论它与突现几何的关系。

英文摘要:

We consider the problem of reconstructing global quantum states from local data. Because the reconstruction problem has many solutions in general, we consider the reconstructed state of maximum global entropy consistent with the local data. We show that unique ground states of local Hamiltonians are exactly reconstructed as the maximal entropy state. More generally, we show that if the state in question is a ground state of a local Hamiltonian with a degenerate space of locally indistinguishable ground states, then the maximal entropy state is close to the ground state projector. We also show that local reconstruction is possible for thermal states of local Hamiltonians. Finally, we discuss a procedure to certify that the reconstructed state is close to the true global state. We call the entropy of our reconstructed maximum entropy state the "reconstruction entropy", and we discuss its relation to emergent geometry in the context of holographic duality.

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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