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This letter further explores the recent scheme of switched quantum channels with indefinite causal order applied to the reference metrological task of quantum phase estimation in the presence of noise.
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K. Goswami, C. Giarmatzi, M. Kewming, F. Costa, C. Branciard, J. Romero and A. G. White, “Indefinite causal order in a quantum switch”, Physical Review Letters 121
2018
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D. Ebler, S. Salek and G. Chiribella, “Enhanced communication with the assistance of indefinite causal order”, Physical Review Letters 120
2018
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2022
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F. Chapeau-Blondeau, “Modeling and simulation of a quantum thermal noise on the qubit”, Fluctuation and Noise Letters 21
2022
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X. Nie, X. Zhu, K. Huang, K. Tang, X. Long, Z. Lin, Y. Tian, C. Qiu, C. Xi, X. Yang, J. Li, Y. Dong, T. Xin and D. Lu, “Experimental realization of a quantum refrigerator driven by indefinite causal orders”, Physical Review Letters 129
2022
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