Quantum sensing protocols usually presuppose where and when each signal acts, yet this information is unavailable beforehand in experiments such as scattering and radar. We show that causal agnosticity forces a measurement scheme to be interferometric even when only discrete interactions are allowed. Describing the sen...
This work derives sample-complexity bounds for estimating entries of the transfer matrix/map to additive accuracy $\epsilon$ with success probability $\ge1-\delta$, under different resources: access to the complex-conjugate channel $\mathcal{E}^*$ and/or parallel access to $c$ copies.
M. Subramanian, Hyukgun Kwon, Liang Jiang· 0 citations
Quantum Krylov diagonalization (QKD) has emerged as a promising hybrid quantum-classical approach for estimating ground-state properties of many-body systems on near-term quantum devices. In this work, we investigate the convergence, stability, and hardware performance of QKD for the one-dimensional Hubbard model with...
Mohammad Mirzakhani, Hyukgun Kwon, Kyungsun Moon· 0 citations
Although the task is learning a particular state, these bounds carry stronger implications than standard state-learning bounds since the learner controls the inputs and ancillary assistance, and establishes a hierarchy of channel-learning resources: self-complex-conjugate channels require two-copy ancilla-assisted acce...
M. Subramanian, Hyukgun Kwon, Liang Jiang· 0 citations
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