Abstract
In a paper by Angella, Otal, Ugarte, and Villacampa, the authors conjectured that on a compact Hermitian manifold, if a Gauduchon connection other than Chern or Strominger is Kähler-like, then the Hermitian metric must be Kähler. They also conjectured that if two Gauduchon connections are both Kähler-like, then the metric must be Kähler. In this paper, we discuss some partial answers to the first conjecture, and give a proof to the second conjecture. In the process, we discovered an interesting “duality” phenomenon amongst Gauduchon connections, which seems to be intimately tied to the question, though we do not know if there is any underlying reason for that from physics.
Similar content being viewed by others
References
Alexandrov, B., Ivanov, S.: Vanishing theorems on Hermitian manifolds. Diff. Geom. Appl. 14, 251–265 (2001)
Angella, D., Otal, A., Ugarte, L., Villacampa, R.: On Gauduchon connections with Kähler-like curvature. arXiv:1809.02632v2
Angella, D., Ugarte, L.: Locally conformal Hermitian metrics on complex non-Kähler manifolds. Mediterr. J. Math. 13, 2105–2145 (2016)
Belgun, F.: On the metric structure of non-Kähler complex surfaces. Math. Ann. 317, 1–40 (2000)
Belgun, F.: On the metric structure of some non-Kähler complex threefolds. arXiv: 1208.4021
Bismut, J.-M.: A local index theorem for non-Kähler manifolds. Math. Ann. 284(4), 681–699 (1989)
Enrietti, N., Fino, A., Vezzoni, L.: Tamed symplectic forms and strong Kähler with torsion metrics. J. Symplectic Geom. 10(2), 203–223 (2012)
Fino, A., Tardini, N.: Some remarks on Hermitian manifolds satisfying Kähler-like conditions. arXiv:2003.06582v1
Fino, A., Tomassini, A.: A survey on strong KT structures. Bull. Math. Soc. Sci. Math. Roumanie 52(100), 99–116 (2009)
Fino, A., Vezzoni, L.: On the existence of balanced and SKT metrics on nilmanifolds. Proc. Am. Math. Soc. 144(6), 2455–2459 (2016)
Fu, J-X.: On non-Kähler Calabi-Yau threefolds with balanced metrics. In: Proceedings of the International Congress of Mathematicians. Volume II, 705-716, Hindustan Book Agency, New Delhi (2010)
Fu, J.-X., Yau, S.-T.: The theory of superstring with flux on non-Kähler manifolds and the complex Monge–Ampère equation. J. Differ. Geom. 78(3), 369–428 (2008)
Fu, J.-X., Li, J., Yau, S.-T.: Constructing balanced metrics on some families of non-Kähler Calabi–Yau threefolds. J. Differ. Geom. 90(1), 81–129 (2012)
Fu, J-X., Zhou, X.: Scalar curvatures in almost Hermitian geometry and some applications. arXiv: 1901.10130
Gates, S.J., Hull, C.M., Roc̆ek, M.: Twisted multiplets and new supersymmetric nonlinear sigma models. Nuc. Phys. B 28, 157–186 (1984)
Gauduchon, P.: La \(1\)-forme de torsion d’une variété hermitienne compacte. Math. Ann. 267(4), 495–518 (1984)
Gauduchon, P.: Hermitian connnections and Dirac operators. Boll. Un. Mat. It 11, 257–288 (1997)
Gray, A.: Curvature identities for Hermitian and almost Hermitian manifolds. Tohoku Math. J. 28(4), 601–612 (1976)
Ivanov, S., Papadopoulos, G.: Vanishing theorems and string backgrounds. Classical Quantum Gravity 18, 1089–1110 (2001)
Khan, G., Yang, B., Zheng, F.: The set of all orthogonal complex structures on the flat \(6\)-torus. Adv. Math. 319, 451–471 (2017)
Li, J., Yau, S.-T.: The existence of supersymmetric string theory with torsion. J. Differ. Geom. 70(1), 143–181 (2005)
Liu, K.F.: Geometry of Hermitian manifolds. Internat. J. Math. 23(6), 40 (2012)
Liu, K.-F., Yang, X.-K.: Ricci cuvratures on Hermitian manifolds. Trans. Am. Math. Soc. 369(7), 5157–5196 (2017)
Liu, K.-F., Yang, X.-K.: Hermitian harmonic maps and non-degenerate curvatures. Math. Res. Lett. 21(4), 831–862 (2014)
Ornea, L., Verbitsky, M.: Locally conformally Kähler manifolds with potential. Math. Ann. 348, 25–33 (2010)
Otal, A., Ugarte, L., Villacampa, R.: Invariant solutions to the Strominger system and the heterotic equations of motion. arXiv:1604.02851v3
Popovici, D.: Limits of projective manifolds under holomorphic deformations: Hodge numbers and strongly Gauduchon metrics. Invent. Math. 194(3), 515–534 (2013)
Streets, J.: Pluriclosed flow and the geometrization of complex surfaces. Geometric Anal. Progress Math. 333, 471–510 (2020)
Strominger, A.: Superstrings with Torsion. Nuclear Phys. B 274, 253–284 (1986)
Székelyhidi, G., Tosatti, V., Weinkove, B.: Gauduchon metrics with prescribed volume form. Acta Math. 219(1), 181–211 (2017)
Tosatti, V.: Non-Kähler Calabi-Yau manifolds. In: Analysis, complex geometry, and mathematical physics: in honor of Duong H. Phong, pp. 261–277 Contemporary Mathematics, 644, American Mathematical Society, Providence, RI, 2015. arXiv: 1401.4797
Tseng, L.-S., Yau, S.-T.: Non-Kähler Calabi-Yau manifolds. String-Math 2011. In: Proceedings of Symposia in Pure Mathematics, American Mathematical Society, Providence, RI 85, pp. 241–254 (2012)
Vezzoni, L., Yang, B., Zheng, F.: Lie groups with flat Gauduchon connections. Math. Zeit. 293(1–2), 597–608 (2019)
Wang, Q., Yang, B., Zheng, F.: On Bismut flat manifolds. Trans. Am. Math. Soc. 373, 5747–5772 (2020)
Yang, B., Zheng, F.: On curvature tensors of Hermitian manifolds. Commun. Anal. Geom. 26(5), 1193–1220 (2018)
Yang, B., Zheng, F.: On compact Hermitian manifolds with flat Gauduchon conmnections. Acta Math. Sin. (English Series) 34, 1259–1268 (2018)
Yau, S.-T., Zhao, Q., Zheng, F.: On Strominger Kähler-like manifolds with degenerate torsion. arXiv:1908.05322v2
Zhao, Q., Zheng, F.: Strominger connection and pluriclosed metrics. arXiv:1904.06604v3
Zhao, Q., Zheng, F.: Complex nilmanifolds and Kähler-like connections. J. Geom. Phys. 146, 14–49 (2019)
Zheng, F.: Some recent progress in non-Kähler geometry. Sci. China Math. 62(11), 2423–2434 (2019)
Author information
Authors and Affiliations
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Zhao is partially supported by National Natural Science Foundations of China with the Grant No. 11801205. Zheng is partially supported by National Natural Science Foundations of China with the Grant Nos. 12071050, 12141101, and by a Chongqing Grant cstc2021ycjh-bgzxm0139.
Rights and permissions
About this article
Cite this article
Zhao, Q., Zheng, F. On Gauduchon Kähler-Like Manifolds. J Geom Anal 32, 110 (2022). https://doi.org/10.1007/s12220-022-00868-5
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s12220-022-00868-5