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quant-ph2018★ 5 cited
Ancilla-assisted schemes are beneficial for Gaussian state phase estimation
Zixin Huang, Chiara Macchiavello, Lorenzo Maccone +1
We study interferometry with Gaussian states and show that an ancilla-assisted scheme outperforms coherent state interferometry for all levels of loss. We also compare the ancilla-…
quant-ph2018★ 17 cited
Noise-dependent optimal strategies for quantum metrology
Zixin Huang, Chiara Macchiavello, Lorenzo Maccone
We show that for some noisy channels, the optimal entanglement-assisted strategy depends on the noise level. We note that there is a non-trivial crossover between the parallel-enta…