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Quantum physics research establishes tight lower bounds for state tomography

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Researchers have established tight lower bounds for state tomography, a process used in quantum physics to determine the properties of quantum states. The new bounds, which apply when measurements are limited to a small number of quantum copies and retain no memory between blocks, match existing upper bounds. This work removes previous restrictions on the number of copies used and is applicable even in neighborhoods of certain quantum states. AI

RANK_REASON Academic paper published on arXiv detailing theoretical research in quantum physics. [lever_c_demoted from research: ic=1 ai=0.1]

Read on arXiv cs.LG →

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Quantum physics research establishes tight lower bounds for state tomography

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Academic paper published on arXiv detailing theoretical research in quantum physics. [lever_c_demoted from research: ic=1 ai=0.1]
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COVERAGE [1]

  1. arXiv cs.LG TIER_1 English(EN) · Ufuk Keskin, Jason Luo, Mahbod Majid, Matthew Radzihovsky ·

    Tight Lower Bounds for State Tomography with Limited Entanglement

    arXiv:2609.05718v1 Announce Type: cross Abstract: We study state tomography when each measurement acts on at most $k$ fresh copies and no quantum memory is retained between blocks. We prove a lower bound matching the upper bound in [arXiv:2510.07788]. Thus the copy complexity of …

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