Abstract
In this paper we will demonstrate that any compact quantum group can be used as symmetries for quantum channels, which leads us to the concept of covariant channels. We then unearth the structure of the convex set of covariant channels by identifying all extreme points under the assumption of multiplicity-free condition for the associated fusion rule, which provides a wide generalization of the results of Mozrzymas et al. (J Math Phys 58(5):052204, 2017). The presence of quantum group symmetry in contrast to the group symmetry will be highlighted in the examples of quantum permutation groups and \(SU_q(2)\). In the latter example, we will see the necessity of the Heisenberg picture coming from the non-Kac type condition. This paper ends with the covariance with respect to projective representations, which leads us back to Weyl covariant channels and its fermionic analogue.
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References
Amosov, G.G., Holevo, A.S., Werner, R.F.: On some additivity problems in quantum information theory. Probl. Inf. Transm. 36(4), 305–313 (2000)
Al Nuwairan, M.: The extreme points of SU(2)-irreducibly covariant channels. Int. J. Math. 25(6), 1450048 (2014)
Banica, T.: Symmetries of a generic coaction. Math. Ann. 314(4), 763–780 (1999)
Brannan, M., Collins, B.: Highly entangled, non-random subspaces of tensor products from quantum groups. Commun. Math. Phys. 358(3), 1007–1025 (2018)
Brannan, M., Collins, B., Lee, H.H., Youn, S.-G.: Temperley-Lieb quantum channels. Commun. Math. Phys. 376(2), 795–839 (2020)
Daws, M.: Operator biprojectivity of compact quantum groups. Proc. Am. Math. Soc. 138(4), 1349–1359 (2010)
Datta, N., Fukuda, M., Holevo, A.S.: Complementarity and additivity for covariant channels. Quantum Inf. Process. 5(3), 179–207 (2006)
Datta, N., Kholevo, A.S., Sukhov, Y.M.: On a sufficient condition for additivity in quantum information theory. Probl. Peredachi Inf. 41(2), 9–25 (2005)
Datta, N., Tomamichel, M., Wilde, M.M.: On the second-order asymptotics for entanglement-assisted communication. Quantum Inf. Process. 15(6), 2569–2591 (2016)
Digernes, T., Varadarajan, V.S.: Models for the irreducible representation of a Heisenberg group. Infinite Dimensional Analysis. Quantum Probab. Relat.Top. 7(4), 527–546 (2004)
Fulton, W., Harris, J.: Representation Theory. A First Course. Graduate Texts in Mathematics. Springer, New York (1991)
Franz, U., Lee, H.H.: Skalski,: Integration over the quantum diagonal subgroup and associated Fourier-like algebras. Int. J. Math. 27(9), 1650073 (2016)
Hashagen, A.-L.K.: Symmetry Methods in Quantum Information Theory. PhD thesis, Technische Universität München (2018)
Hayashi, M.: Group Representation for Quantum Theory. Springer, Cham (2017). Revised and expanded from the (2014) Japanese original
Hayashi, M.: A Group Theoretic Approach to Quantum Information. Springer, Cham (2017). Translated from the 2014 Japanese original
Keyl, M.: Fundamentals of quantum information theory. Phys. Rep. 369(5), 431–548 (2002)
Koelink, H.T., Koornwinder, T.H.: The Clebsch-Gordan coefficients for the quantum group \({{\rm S}}_\mu {{\rm U}}(2)\) and \(q\)-Hahn polynomials. Nederl. Akad. Wetensch. Indag. Math. 51(4), 443–456 (1989)
Klimyk, A., Schmüdgen, K.: Quantum Groups and Their Representations. Texts and Monographs in Physics. Springer, Berlin (1997)
König, R., Wehner, S.: A strong converse for classical channel coding using entangled inputs. Phys. Rev. Lett. 103, 070504 (2009)
Lieb, E.H.: Proof of an entropy conjecture of Wehrl. Commun. Math. Phys. 62(1), 35–41 (1978)
Lieb, E.H., Solovej, J.P.: Proof of an entropy conjecture for Bloch coherent spin states and its generalizations. Acta Math. 212(2), 379–398 (2014)
Marvian, I., Spekkens, R.W.: Asymmetry properties of pure quantum states. Phys. Rev. A 90, 014102 (2014)
Mozrzymas, M., Studziński, M., Datta, N.: Structure of irreducibly covariant quantum channels for finite groups. J. Math. Phys. 58(5), 052204 (2017)
Mendl, C.B., Wolf, M.M.: Unital quantum channels-convex structure and revivals of Birkhoff’s theorem. Commun. Math. Phys. 289(3), 1057–1086 (2009)
Siudzińska, K., Chruściński, D.: Quantum channels irreducibly covariant with respect to the finite group generated by the Weyl operators. J. Math. Phys. 59(3), 033508 (2018)
Timmermann, T.: An invitation to quantum groups and duality. EMS Textbooks in Mathematics. European Mathematical Society (EMS), Zürich, (2008). From Hopf algebras to multiplicative unitaries and beyond
Tokuyama, T.: On the decomposition rules of tensor products of the representations of the classical Weyl groups. J. Algebra 88, 380–394 (1984)
Vollbrecht, K.G.H., Werner, R.F.: Entanglement measures under symmetry. Phys. Rev. A 64, 062307 (2001)
Wang, S.: Quantum symmetry groups of finite spaces. Commun. Math. Phys. 195(1), 195–211 (1998)
Werner, R.F.: Quantum states with Einstein–Podolsky–Rosen correlations admitting a hidden-variable model. Phys. Rev. A 40, 4277–4281 (1989)
Werner, R.F., Holevo, A.S.: Counterexample to an additivity conjecture for output purity of quantum channels. Quantum Inf. Theory 43, 4353–4357 (2002)
Woronowicz, S.L.: Compact matrix pseudogroups. Commun. Math. Phys. 111(4), 613–665 (1987)
Woronowicz, S.L.: Twisted \({{\rm SU}}(2)\) group. An example of a noncommutative differential calculus. Publ. Res. Inst. Math. Sci. 23(1), 117–181 (1987)
Wilde, M.M., Tomamichel, M., Berta, M.: Converse bounds for private communication over quantum channels. IEEE Trans. Inf. Theory 63(3), 1792–1817 (2017)
Acknowledgements
S.-G. Youn was funded by the New Faculty Startup Fund from Seoul National University, by Samsung Science and Technology Foundation under Project Number SSTF-BA2002-01 and by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1C1C1A01009681). H.H. Lee was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) Grant NRF-2017R1E1A1A03070510 and the National Research Foundation of Korea (NRF) Grant funded by the Korean Government (MSIT) (Grant No. 2017R1A5A1015626).
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Communicated by Y. Kawahigashi.
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Lee, H.H., Youn, SG. Quantum Channels with Quantum Group Symmetry. Commun. Math. Phys. 389, 1303–1329 (2022). https://doi.org/10.1007/s00220-021-04283-9
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DOI: https://doi.org/10.1007/s00220-021-04283-9