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Quantum theory allows the traversing of multiple channels in a superposition of different orders.
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A. Feix, M. Araújo, and Č. Brukner, Quantum superposition of the order of parties as a communication resource, Phys. Rev. A 92
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2016
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2016
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2016
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2016
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J. Suzuki, Nuisance parameter problem in quantum estimation theory: tradeoff relation and qubit examples, J. Phys. A: Math. Theor. 53
2020
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J. Suzuki, Y. Yang, and M. Hayashi, Quantum state estimation with nuisance parameters, J. Phys. A: Math. Theor. 53
2020
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J. Rubio, P. A. Knott, T. J. Proctor, and J. A. Dunningham, Quantum sensing networks for the estimation of linear functions, J. Phys. A: Math. Theor. 53
2020
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2020
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T. Guha, M. Alimuddin, and P. Parashar, Thermodynamic advancement in the causally inseparable occurrence of thermal maps, Phys. Rev. A 102
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O. Oreshkov and C. Giarmatzi, Causal and causally separable processes, New Journal of Physics 18
2016
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R. Whittaker, C. Erven, A. Neville, M. Berry, J. L. O’Brien, H. Cable, and J. C. F. Matthews, Absorption spectroscopy at the ultimate quantum limit from single-photon states, New J. Phys. 19
2017
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J. Řehaček, Z. Hradil, B. Stoklasa, M. Paúr, J. Grover, A. Krzic, and L. L. Sánchez-Soto, Multiparameter quantum metrology of incoherent point sources: Towards realistic superresolution, Phys. Rev. A 96
2017
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G. Rubino, L. A. Rozema, A. Feix, M. Araújo, J. M. Zeuner, L. M. Procopio, Č. Brukner, and P. Walther, Experimental verification of an indefinite causal order, Sci. Adv. 3
2017
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D. Leung and J. Watrous, On the complementary quantum capacity of the depolarizing channel, Quantum 1
2017
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D. Braun, G. Adesso, F. Benatti, R. Floreanini, U. Marzolino, M. W. Mitchell, and S. Pirandola, Quantum-enhanced measurements without entanglement, Rev. Mod. Phys. 90
2018
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T. J. Proctor, P. A. Knott, and J. A. Dunningham, Multiparameter estimation in networked quantum sensors, Phys. Rev. Lett. 120
2018
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X. Zhao, Y. Yang, and G. Chiribella, Quantum metrology with indefinite causal order, Phys. Rev. Lett. 124
2020
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K. Goswami, Y. Cao, G. A. Paz-Silva, J. Romero, and A. G. White, Increasing communication capacity via superposition of order, Phys. Rev. Research 2
2020
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Y. Guo, X.-M. Hu, Z.-B. Hou, H. Cao, J.-M. Cui, B.-H. Liu, Y.-F. Huang, C.-F. Li, G.-C. Guo, and G. Chiribella, Experimental transmission of quantum information using a superposition of causal orders, Phys. Rev. Lett. 124
2020
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A. Dimić, M. Milivojević, D. GoČanin, N. S. Móller, and Č. Brukner, Simulating indefinite causal order with Rindler observers, Front. Phys. 8
2020
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M. Tsang, F. Albarelli, and A. Datta, Quantum semiparametric estimation, Phys. Rev. X 10
2020
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C. You, M. Hong, P. Bierhorst, A. E. Lita, S. Glancy, S. Kolthammer, E. Knill, S. W. Nam, R. P. Mirin, O. S. Magaña-Loaiza, and T. Gerrits, Scalable multiphoton quantum metrology with neither pre- nor post-selected measurements, Appl. Phys. Rev. 8
2021
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F. Belliardo and V. Giovannetti, Incompatibility in quantum parameter estimation, New J. Phys. 23
2021
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L. J. Fiderer, T. Tufarelli, S. Piano, and G. Adesso, General expressions for the quantum Fisher information matrix with applications to discrete quantum imaging, PRX Quantum 2
2021
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M. M. Taddei, J. Cariñe, D. Martínez, T. García, N. Guerrero, A. A. Abbott, M. Araújo, C. Branciard, E. S. Gómez, S. P. Walborn, L. Aolita, and G. Lima, Computational advantage from the quantum superposition of multiple temporal orders of photonic gates, PRX Quantum 2
2021
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J. Wechs, H. Dourdent, A. A. Abbott, and C. Branciard, Quantum circuits with classical versus quantum control of causal order, PRX Quantum 2
2021
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G. Chiribella, M. Banik, S. S. Bhattacharya, T. Guha, M. Alimuddin, A. Roy, S. Saha, S. Agrawal, and G. Kar, Indefinite causal order enables perfect quantum communication with zero capacity channels, New J. Phys. 23
2021
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G. Rubino, L. A. Rozema, D. Ebler, H. Kristjánsson, S. Salek, P. Allard Guérin, A. A. Abbott, C. Branciard, Č. Brukner, G. Chiribella, and P. Walther, Experimental quantum communication enhancement by superposing trajectories, Phys. Rev. Research 3
2021
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S. Milz, D. Jurkschat, F. A. Pollock, and K. Modi, Delayed-choice causal order and nonclassical correlations, Phys. Rev. Research 3
2021
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J. Barrett, R. Lorenz, and O. Oreshkov, Cyclic quantum causal models, Nature Commun. 12
2021
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T. Purves and A. J. Short, Quantum theory cannot violate a causal inequality, Phys. Rev. Lett. 127
2021
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I. Gianani, F. Albarelli, A. Verna, V. Cimini, R. Demkowicz-Dobrzanski, and M. Barbieri, Kramers–Kronig relations and precision limits in quantum phase estimation, Optica 8
2021
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J. Liu, M. Zhang, H. Chen, L. Wang, and H. Yuan, Optimal scheme for quantum metrology, Adv. Quantum Technol. 5
2022
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H. Cao, N.-N. Wang, Z. Jia, C. Zhang, Y. Guo, B.-H. Liu, Y.-F. Huang, C.-F. Li, and G.-C. Guo, Quantum simulation of indefinite causal order induced quantum refrigeration, Phys. Rev. Res. 4
2022
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2022
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T. Guha, S. Roy, K. Simonov, and Z. Zimborás, Activation of thermal states by quantum switch-driven thermalization and its limits (2022)
2022
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K. Simonov, G. Francica, G. Guarnieri, and M. Paternostro, Work extraction from coherently activated maps via quantum switch, Phys. Rev. A 105
2022
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G. Rubino, L. A. Rozema, F. Massa, M. Araújo, M. Zych, Č. Brukner, and P. Walther, Experimental entanglement of temporal order, Quantum 6
2022
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F. Chapeau-Blondeau, Indefinite causal order for quantum metrology with quantum thermal noise, Phys. Lett. A 447
2022
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F. Delgado, Symmetries of quantum Fisher information as parameter estimator for Pauli channels under indefinite causal order, Symmetry 14
2022
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J. Qin, Y.-H. Deng, H.-S. Zhong, L.-C. Peng, H. Su, Y.-H. Luo, J.-M. Xu, D. Wu, S.-Q. Gong, H.-L. Liu, H. Wang, M.-C. Chen, L. Li, N.-L. Liu, C.-Y. Lu, and J.-W. Pan, Unconditional and robust quantum metrological advantage beyond N00N states, Phys. Rev. Lett. 130
2023
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2023
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Q. Liu, Z. Hu, H. Yuan, and Y. Yang, Optimal strategies of quantum metrology with a strict hierarchy, Phys. Rev. Lett. 130
2023
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