We find a general class of pp-wave string solutions with NS-NS H3 or R-R F3 field strengths, which are analogous to solutions with non-constant F5 recently considered by Maldacena and Maoz (hep-th/0207284). We show that: (i) all pp-wave solutions supported by non-constant H3 or Fp fields are exact type II superstring solutions to all orders in α ; (ii) the corresponding light-cone gauge Green-S...

The study of perturbative superstring spectra indicates that there must exist a so-called Type IIB supergravity as the low energy limit of type IIB superstring in addition to the well-known type IIA supergravity. This theory has two spacetime supersymmetries with the same handedness and is therefore chiral. The field content for this theory (in the real basis) consists of the metric gμν , a 2-f...

Fermion-boson stars are starlike systems composed of the ordinary nuclear matter a neutron star and bosonic dark matter. The has typically been taken to be complex scalar field. A natural extension is for field charged. We make simplest gauge under $U(1)$. therefore study fermion--charged-boson stars. detailed stability this system by computing critical curves over whole parameter space. then h...

Recent analysis of string theory 1,2,3 suggests that classical dynamics of tachyon on an unstable D-brane is described by a scalar Born-Infeld type action with a runaway potential 4. Characteristic of such tachyon effective theory is absence of perturbative tachyonic modes around the potential minimum and existence of spatially homogeneous rolling tachyon configuration 5. In the background of t...

Following Feynman’s treatment of the non-relativistic polaron problem, similar techniques are used to study relativistic field theories: after integrating out the bosonic degrees of freedom the resulting effective action is formulated in terms of particle trajectories (worldlines) instead of field operators. The Green functions of the theory are then approximated variationally on the pole of th...

If a global continuous symmetry of a supersymmetric field theory is spontaneously broken while preserving the supersymmetry, the resulting theory has a massless superfield. One of its two bosonic degrees of freedom is the familiar phase rotation of the usual massless Nambu-Goldstone boson, but the other is a scale transformation. An indeterminate mass scale is thus generated. However, any break...

We prove that a Kähler supermetric on a supermanifold with one complex fermionic dimension admits a super Ricci-flat supermetric if and only if the bosonic metric has vanishing scalar curvature. As a corollary, it follows that Yau’s theorem does not hold for supermanifolds. Calabi[1] proposed that if a Kähler manifold has vanishing first Chern class, that is, the Ricci-form obeys Rij̄(g) = ∂iv̄j ...

Quantum simulation of quantum field theory is a flagship application computers that promises to deliver capabilities beyond classical computing. The realization advantage will require methods can accurately predict error scaling as function the resolution and parameters model be implemented efficiently on hardware. In this paper, we address representation lattice bosonic fields in discretized a...

The study of the properties and dynamics of self-gravitating bosonic objects in Einstein gravity was conducted. Bosons are promising candidates for dark matter. They can form compact objects through a Jeans instability mechanism. We studied boson stars made up of self-gravitating scalar fields, with and without nonlinear self-couplings. These are non-topological solutions of the coupled Einstei...

We investigate whether the gravitational thermodynamic properties of the scalar-tensor theory of gravity are affected by the conformal transformation or not. As an explicit example, we consider an electrically charged static spherical black hole in the 4-dimensional low energy effective theory of bosonic string. E-mail address : [email protected] E-mail address : [email protected]. ...