geometry, complex numbers, complex line
$dim = 1$: Riemann surface, super Riemann surface
Traditionally the $(k+1)$st intermediate Jacobian variety $J^{k+1}(\Sigma)$ of a complex analytic space $\Sigma$ is the quotient of its ordinary cohomology in degree $2k+1$ with real number coefficients by that with integer coefficients
This space naturally carries the structure of a complex manifold (in fact two such structures, named after Griffiths and after Weil) and this complex analytic space, which is in fact a complex torus, is properly what is called the $(k+1)$st intermediate Jacobian variety of $\Sigma$. This terminology derives from the term Jacobian variety which is the (historically earlier) special case for $k = 0$ and $dim_{\mathbb{C}}(\Sigma) = 1$.
Notice that conceptually we may
think of $H^{2k+1}(\Sigma,\mathbb{R})$ as the space of those n-form connections on $\Sigma$ which are both flat and have trivial underlying line n-bundle;
think of $H^{2k + 1}(\Sigma,\mathbb{Z})$ as the group of “large” (not connected to the identity) higher gauge transformations acting on these gauge fields;
and hence understand $J^{k+1}(\Sigma)$ as the moduli space of flat $n$-form connections on trivial underlying line $n$-bundles.
This turns out to be a natural and useful perspective on intermediate Jacobians: Deligne’s theorem (discussed as theorem below) characterizes the intermediate Jacobians as subgroups of the relevant Deligne cohomology group of $\Sigma$, where Deligne cohomology is a model for ordinary differential cohomology that classifies these line n-bundles with connection. Moreover, as discussed in prop. below, Deligne’s theorem in the formulation of (Esnault-Viehweg 88) may be rephrased such as to manifestly give a formal incarnation of the the statement that $J^{k+1}(\Sigma)$ is just that subgroup of the Deligne complex given by line n-connections with trivial curvature and trivial underlying line n-bundle.
This formulation in turn has an evident generalization from ordinary differential cohomology to general (namely generalized Eilenberg-Steenrod type) differential cohomology. This we discuss further below.
This perspective on intermediate Jacobians from higher gauge theory also faithfully reflects their role in fundamental physics (in quantum field theory and string theory) (Witten 96, [Hopkins-Singer 02]). Here higher dimensional Chern-Simons theory has as fields types of higher gauge field specified by some type of differential cohomology, and the connected components of its phase space is precisely the corresponding intermediate Jacobian. Moreover the transgression of the higher Chern-Simons action functional produces a line bundle on the intermediate Jacobian, which is the prequantum line bundle of the theory. By geometric quantization one has to choose a Kähler polarization for this line bundle and the Weil complex structure on $J^{k+1}(\Sigma)$ is precisely that. In terms of complex geometry this state of affairs directly translates into the statement that the Weil intermediate Jacobians are polarized varieties. In fact they are principally polarized, which on the physics side corresponds to the metaplectic correction of the Kähler polarization used for geometric quantization. The holomorphic section of the resulting Theta characteristic on the intermediate Jacobian is physically the partition function of self-dual higher gauge theory on $\Sigma$ (see there for more) which mathematically is the corresponding theta function.
By way of these deep relations intermediate Jacobians play an important role in (higher) geometry.
Let $\Sigma$ be a projective smooth complex variety (see at GAGA).
For $k \in \mathbb{N}$ the $k$th intermediate Jacobian of $\Sigma$ is, as a real manifold, the quotient
of the ordinary cohomology groups of $X$ with coefficients in the abelian groups of real numbers and of integers, respectively, induced by the canonical inclusion $\mathbb{Z} \hookrightarrow \mathbb{R}$.
Here $H^{2k+1}(\Sigma,\mathbb{R})$ is naturally a vector space over the real numbers and this is what induces the smooth manifold-structure on the quotient.
For eventually equipping this with the structure of a complex manifold one realizes this as the quotient of the complex vector space of cohomology with complex coefficients as follows:
A real differential form
is, by the Hodge theorem, a sum of complex differential forms in homogeneous Dolbeault bidegree of the form
where
is the antilinear function on complex differential forms given by complex conjugation.
It follows with the de Rham theorem that:
There is a canonical isomorphism of real vector spaces
where
is the $(k+1)$st stage in the Hodge filtration of $H^{2k+1}(\Sigma,\mathbb{C})$.
Hence an equivalent way to write the intermediate Jacobian (still as a real manifold) as the quotient of the real manifold underlying a complex vector space is the following:
The intermediate Jacobian of def. is equivalently
Yet one more reformulation is useful when properly working in complex analytic geometry/GAGA:
Write $(\mathbf{B}^k \mathbb{G}_a)_{conn}$ for the chain complex of sheaves on the complex analytic site which assigns the truncated de Rham complex of holomorphic differential forms
regarded as sitting in degrees $k$ to 0.
e.g. (Esnault-Viehweg 88, top of p. 14)
The quotient in prop. is equivalently the abelian sheaf hypercohomology with coefficients in $\mathbf{B}^{2k}\mathbb{G}_a$ of def. :
e.g. (Esnault-Viehweg 88, 2.5 b)).
There are two canonical ways to equip $H^{2k+1}(\Sigma,\mathbb{C})$, and hence the above quotient, with the structure of a complex manifold. Sometimes these agree, but in general they do not, and hence they go by different names,the
and the
A theorem due to Pierre Deligne says that this $J^k(\Sigma)$ is characterised as being the fiber of a canonical map from (complex analytic) Deligne cohomology to the $k$th Hodge filtration of integral cohomology.
The group $Hdg^{k+1}(\Sigma)$ of Hodge cohomology classes is the subgroup of $\mathbb{Z}(k+1)$-cohomology classes whose image in complex cohomology is in the $(k+1)$st stage of the Hodge filtration, hence the group sitting in a pullback diagram
The following says this in a complex analytic-way that generalizes:
Equivalently the Hodge cohomology classes of def. are given by the pullback
where now in the top right we have the abelian sheaf hypercohomology with coefficients in the holomorphic de Rham complex, truncated (but otherwise unshifted) as indicated.
(Esnault-Viehweg 88, section 7.8)
(Deligne)
As an abelian group the intermediate Jacobian $J^k(\Sigma)$, def. , is characterized by fitting into the short exact sequence
(e.g. Esnault-Viehweg 88, (7.9), Peters-Steenbrink 08, lemma 7.20) .
Use prop. and the characteristic long exact sequences of ordinary differential cohomology.
The fiber product-incarnation of $Hdg^{k+1}(\Sigma)$ in prop. is noteworthy in that it is analogous to the homotopy fiber-characterization of the holomorphic Deligne complex itself.
Consider the following diagram of sheaves of chain complexes on the site $SteinSp$ of Stein manifolds (see at complex analytic ∞-groupoid for more on this):
This is just of the form as discussed in some detail at circle n-bundle with connection and also at differential cohomology diagram in the section on Deligne coefficients. In particular the homotopy limit over this diagram, hence the homotopy fiber of the two maps is a version of the Deligne complex
Since homotopy pullbacks are preserved by foming mapping spaces into them, this statement holds true after evaluating on $\Sigma$ (which produces the Cech-Deligne complexes). Forming the 0-truncation $\tau_0$ of the result gives the differential cohomology group $H^{2k+2}(\Sigma, \mathbb{Z}(k+1)_{D})$ appearing in theorem .
Alternatively, first passing the 0-truncation of the diagram and then producing the pullback yields the Hodge cocycle group of prop. .
Accordingly, the statement of theorem may equivalently be rephrased in the following more suggestive way:
the intermediate Jacobian $J^{k+1}(\Sigma)$ is the fiber in
This formulation of the intermediate Jacobian has a straightforward generalization from ordinary differential cohomology to differential generalized (Eilenberg-Steenrod) cohomology. This we turn to below.
The isomorphism
induces a complex manifold structure on $H^{2k+1}(\Sigma , \mathbb{C})$ and hence the structure of a complex torus on $k$th intermediate Jacobian as defined above. This is the structure originally defined in (Griffiths 68a, Griffiths 68b) and hence called the Griffith intermediate Jacobian. Reviews include (Walls 12, Esnault-Viehweg 88, section 7.8).
There is another natural complex structure on $H^{2k-1}(X, \mathbb{R})/H^{2k-1}(X, \mathbb{Z})$, equipped with that it is called the Weil intermediate Jacobian.
Let as before $n \coloneqq dim_{\mathbb{C}}(\Sigma)$. Choose a Hermitian manifold structure on $\Sigma$. Then Serre duality on forms of total odd degree
is an antilinear function which squares to -1. Therefore
is a real structure on $H^{2k+1}(\Sigma,\mathbb{C})$. This hence defines a complex manifold structure on $H^{2k+1}(\Sigma,\mathbb{C})$ and hence on the above quotient which is the intermediate Jacobian $J^{k+1}(\Sigma)$. As such this is the Weil intermediate Jacobian.
The Weil intermediate Jacobian is particularly interesting in mid degree, hence if
then for $J^{k+1}(\Sigma)$. This case is also known as Lazzeri’s Jacobians see (Rubei 98).
In this case the intersection pairing
defines a symplectic form, for which the Hodge star operator is a compatible complex structure and hence the Serre duality-pairing
is the corresponding Kähler. This makes the Weil intermediate Jacobian a polarized variety.
Notice that the holomorphic coordinates in
may be thought of as the mid-degree self-dual higher gauge fields on $\Sigma$. From this point of view the above is the Kähler polarization of the prequantum line bundle on higher dimensional Chern-Simons theory in dimension $4k+3$.
By prop. above the intermediate Jacobian is defined by the canonical Hodge filtering on complex ordinary cohomology. The definition obtained this way directly generalizes to other Hodge structures $H$ and hence one speaks more generally of the intermediate Jacobian
if $H$ has weight $2k+1$.
(e.g. Peters-Steenbrink 08, example 3.30, section 7.1.2)
under construction, see also (Hopkins-Quick 12)…
The formulation of the traditional intermediate Jacobian by remark above suggest the following generalization.
(We use notation from differential cohomology hexagon).
Given any differential cohomology spectrum $\hat E$ (hence a spectrum object) in a cohesive (∞,1)-topos $\mathbf{H}$, it sits in its differential cohomology hexagon part of which is the homotopy pullback
Hence for any $\Sigma$ also the mapping spectra
Write $\tau_0 \colon \mathbf{H}\to \mathbf{H}$ for the 0-truncation map and consider the fiber product $Hdg(\Sigma,E)$ in
We may call this the Hodge cohomology of $\Sigma$ with coefficients in $\hat E$. The evident morphism of diagrams induces a morphism
and the homotopy fiber of that
we may call the intermediate Jacobian $\infty$-stack of $\Sigma$ with coefficients in $\hat E$.
Notice that by commutativity of homotopy pullbacks with homotopy fibers, this is equivalently the homotopy pullback in
In this form this manifestly says that $\mathbf{J}(\Sigma,\hat E)$ is precisely the differential cohomology theory of $\Sigma$ obtained from $\hat E$ by restricting to trivial curvature and trivial underlying $\Pi(E)$-cohomology.
Intermediate Jacobians of K-theory classes were considered in the physics-style literature in (Witten 99, section 4.3, Moore-Witten 99, section 3, DMW 00, section 7.1, Belov-Moore 06b, section 5) as a means for quantization of the RR-field in type II superstring theory as a self-dual higher gauge theory (see there at Examples – RR-fields in 10d). A mathematical discussion inspired by this is in (MPS 11).
While the Griffiths complex structure on the intermediate Jacobian is not Kähler/not an algebraic polarization as the Weil complex structure is, it still has an p-convex polarization and there is a symplectomorphism which is an isomorphism between the Griffiths and the Weil intermediate Jacobians as real symplectic manifolds
This is due to (Griffiths 68b), recalled as Griffiths 12 (2.6)
(…)
The intermediate Jacobians receive canonical maps from cycles (…) See at Abel-Jacobi map.
For a Hodge manifold the intermediate Jacobian canonically inherits the structure of a polarized variety. (…)
A certain square root of the canonical bundle on intermediate Jacobians – hence a Theta characteristic – in dimension $2k+1$ thought of as moduli spaces of (flat) circle (2k+1)-bundles with connection yields the partition function of self-dual higher gauge theory. (Witten 96, Hopkins-Singer 02).
By theorem the formal geometry of intermediate Jacobians around their canonical point is equivalently the deformation theory of Deligne cohomology/line n-bundles with connection. This is given by (when it exists) the Artin-Mazur formal group for deformations of Deligne cohomology (see there).
The two extreme cases of intermediate Jacobians $J^k(\Sigma)$ with minimal $k = 0$ and maximal $k = dim_{\mathbb{C}}(\Sigma)= 1$ go by special names, the
respectively.
Of special interest are also the intermediate Jacobian
The intermediate Jacobian $J^1(\Sigma)$, def. , of a complex curve ($dim_{\mathbb{C}}(\Sigma) = 1$) coincides with the connected component $Pic_0(\Sigma)$ of the Picard variety $Pic(\Sigma)$ of $\Sigma$, hence with the Jacobian variety $Jac(\Sigma)$:
First consider the elementary proof by direct inspection (e.g. Polishchuk 03, section 16.4):
Notice that the canonical map
is an isomorphism. The first map is induced by the splitting $H^1(\Sigma, \mathbb{C}) \simeq H^1(\Sigma,\mathbb{R})\oplus i H^1(\Sigma,\mathbb{R})$ given by complexification and the second by the splitting $H^1(\Sigma,\mathbb{C}) \simeq H^{0,1}(\Sigma)\oplus H^{1,0}(\Sigma)$ of Dolbeault cohomology, the last map is the Dolbeault isomorphism.
Therefore by the long exact sequence in cohomology of the exponential exact sequence we have that
is the connected component of the Picard variety of $\Sigma$.
Alternatively, prop. derives from theorem as follows:
Since $k = 0$ then $\mathbf{B}^2\mathbb{Z}(k+1)_D\simeq \mathbf{B}\mathbb{G}_m$ is just the universal moduli stack of line bundles without connection and so $H^{2k+2}(\Sigma, \mathbb{Z}(k+1)_D ) \simeq H(\Sigma,\mathbf{B}\mathbb{G}_m)$ is the full Picard variety. The fiber in the exact sequence in theorem then restricts this to the elements which have trivial first Chern class, hence the Jacobian variety.
There is a non-abelian generalization of this statement that the moduli space of real bundles with flat connections is equivalently a moduli space of complex-analytic bundles, but without connection. This is a corollary of the Narasimhan-Seshadri theorem (for $dim_{\mathbb{C}}\Sigma = 1$) or of the Donaldson-Uhlenbeck-Yau theorem (for Kähler manifolds $\Sigma$) and generally of the Kobayashi-Hitchin correspondence (for arbitrary complex $\Sigma$), stated for instance as (Scheinost-Schottenloher 96, corollary 1.16):
the moduli space of flat SU(n)-principal connections on $\Sigma$ is equivalently the moduli space of SL(n,C)-holomorphic vector bundles which have vanishing Chern classes and are semi-stable.
For $\Sigma$ any space of complex dimension $n \coloneqq dim_{\mathbb{C}}(\Sigma)$ then with $k = n-1$ the $(k+1)$st intermediate Jacobian is built from cohomology in degree one less than the real dimension of $\Sigma$:
This $(n-1)$st intermediate Jacobian is known as the Albanese variety of $\Sigma$.
A review of intermediate Jacobians of Calabi-Yau varieties of (complex) dimension 3 is in (Baarsma 11, section 2).
The (real) dimensional of the intermediate Jacobian of a CY3 $X$ is
(e.g. Baarsma 11, (2.21))
Hence the intermediate Jacobian of a rigid CY3 (with $h^{1,2} = 0$) is an elliptic curve (e.g. BKNPP 09, (1.8)).
For the moment see at 7d Chern-Simons theory and at M5-brane.
For the RR-field component in degree 4 of type IIA superstring theory: (Morrison 95)
moduli spaces of line n-bundles with connection on $n$-dimensional $X$
The definition of the Griffith intermediate Jacobian is due to
Phillip Griffiths, Periods of integrals on algebraic manifolds. I Construction and properties of the modular varieties“, American Journal of Mathematics 90 (2): 568–626, (1968) doi:10.2307/2373545, ISSN 0002-9327, JSTOR 2373545, MR 0229641
Phillip GriffithsPeriods of integrals on algebraic manifolds. II Local study of the period mapping“, American Journal of Mathematics 90 (3): 805–865 (1968), doi:10.2307/2373485, ISSN 0002-9327, JSTOR 2373485, MR 0233825
(summary pdf)
A review including also the Weil complex structure is in
For $k = 0$ but with generalization to non-abelian moduli space of flat connections the Grifiths-like follows also with the Donaldson-Uhlenbeck-Yau theorem as discussed in
The mid-dimensional case was discussed in unpublished work by Lazzeri, see
The relation of the intermediate Jacobian to Deligne cohomology (Deligne’s theorem) due to Pierre Deligne is discussed in
Reviews and surveys include
Wikipedia, Intermediate Jacobian
Patrick Walls, Intermediate Jacobians and Abel-Jacobi maps, 2012 (pdf)
Jean-Luc Brylinski, around theorem I 1.5.11 of Loop Spaces, Characteristic Classes and Geometric Quantization Springer, 2007
Arnaud Beauville, Variétés de Prym et jacobiennes intermédiaire, Annales scientifiques de l’École Normale Supérieure, Sér. 4, 10 no. 3 (1977), p. 309-391 (pdf) (jstor)
Valentin Zakharevich, Mixed Intermediate Jacobians, 2012 (pdf)
Alexander Polishchuk, Abelian varieties, Theta functions and the Fourier transform, Cambridge University Press (2003) (pdf)
Discussion of the generalization to Hodge structures includes
Chris Peters, Jozef Steenbrink, Mixed Hodge Structures, Ergebisse der Mathematik (2008) (pdf)
Discussion of intermediate Jacobians of Calabi-Yau 3-folds includes
C. Herbert Clemens, Phillip Griffith, The intermediate Jacobian of the cubic threefold, Annals of Mathematics Second Series, Vol. 95, No. 2 (Mar., 1972), pp. 281-356 (JSTOR)
Andreas Höring, Minimal classes on the intermediate Jacobian of a generic cubic threefold, 2008 (pdf)
Applications in string theory:
David Morrison, section 4 of Mirror Symmetry and the Type II String, Nucl.Phys.Proc.Suppl. 46 (1996) 146-155 (arXiv:hep-th/9512016)
Diaconescu, Ron Donagi, Tony Pantev, Intermediate Jacobians and ADE Hitchin Systems (arXiv:hep-th/0607159)
Ling Bao, Axel Kleinschmidt, Bengt E. W. Nilsson, Daniel Persson, Boris Pioline, Instanton Corrections to the Universal Hypermultiplet and Automorphic Forms on SU(2,1), Commun. Num. Theor. Phys. 4 (1), 187-266 (2010) (arXiv:0909.4299)
A. Baarsma, The hypermultiplet moduli space of compactified type IIA string theory, Master Thesis, Utrecht 2011 (web)
The relation of Theta characteristics on intermediate Jacobians to self-dual higher gauge theory was first recognized in
and the argument there was made rigorous in
Intermediate Jacobians of K-theory classes were discussed in the physics literature context of self-dual higher gauge theory for RR-fields in
Edward Witten, Duality Relations Among Topological Effects In String Theory, JHEP 0005:031,2000 (arXiv:hep-th/9912086)
Gregory Moore, Edward Witten, Self-Duality, Ramond-Ramond Fields, and K-Theory, JHEP 0005:032,2000 (arXiv:hep-th/9912279)
D. Diaconescu, Gregory Moore, Edward Witten, $E_8$ Gauge Theory, and a Derivation of K-Theory from M-Theory, Adv.Theor.Math.Phys.6:1031-1134,2003 (arXiv:hep-th/0005090), summarised in A Derivation of K-Theory from M-Theory (arXiv:hep-th/0005091)
Dmitriy Belov, Greg Moore, Type II Actions from 11-Dimensional Chern-Simons Theories (arXiv:hep-th/0611020)
A mathematical discussion inspired by this is in
A discussion of intermediate Jacobians for any rationally periodic generalized (Eilenberg-Steenrod) cohomology theory is in
Last revised on August 11, 2016 at 02:38:38. See the history of this page for a list of all contributions to it.