No Forbidden Landscape in String/M-theory (2009)
Scale invariant but non-conformal field theories are forbidden in (1+1) dimension, and so should be the corresponding holographic dual gravity theories. We conjecture that such scale invariant but...
Forbidden Landscape from Holography (2009)
We present a class of field configurations that are forbidden in the quantum gravity because of inconsistency in the dual field theory from holography. Scale invariant but non-conformal field...
Gravity Dual for Reggeon Field Theory and Non-linear Quantum Finance (2009)
We study scale invariant but not necessarily conformal invariant deformations of non-relativistic conformal field theories from the dual gravity viewpoint. We present the corresponding metric that...
On D3-brane Dynamics at Strong Warping (2009)
Chen, Heng-Yu, Nakayama, Yu, Shiu, Gary
We study the dynamics of a D3 brane in generic IIB warped compactifications, using the Hamiltonian formulation discussed in arXiv:0805.3700 [hep-th]. Taking into account of both closed and open...
Observables and Correlators in Nonrelativistic ABJM Theory (2009)
Non-relativistic ABJM theory is defined by Galilean limit of mass-deformed N=6 Chern-Simons theory. Holographic string theory dual to the theory is not known yet. To understand features candidate...
Unparticles and Holographic Renormalization Group (2009)
We revisit the unparticle interactions and propagators from the AdS-CFT point of view, and we show how the contact terms and their renormalization group flow appear in the context of the holographic...
Nambu-Goldstone Dark Matter and Cosmic Ray Electron and Positron Excess (2009)
Ibe, Masahiro, Nakayama, Yu, Murayama, Hitoshi, Yanagida, Tsutomu T.
We propose a model of dark matter identified with a pseudo-Nambu-Goldstone boson in the dynamical supersymmetry breaking sector in a gauge mediation scenario. The dark matter particles annihilate via...
Non-Relativistic M2-brane Gauge Theory and New Superconformal Algebra (2009)
Nakayama, Yu, Sakaguchi, Makoto, Yoshida, Kentaroh
We study non-relativistic limits of the N=6 Chern-Simons-Matter theory that arises as a low-energy limit of the M2-brane gauge theory with background flux. The model admits several different...
Emerging AdS from Extremally Rotating NS5-branes (2008)
We investigate the near-horizon limit of extremally rotating NS5-branes. The resulting geometry has SL(2,R) \times U(1)^2 isometry. The asymptotic symmetry group contains a chiral Virasoro algebra,...
Interacting SUSY-singlet matter in non-relativistic Chern-Simons theory (2008)
Nakayama, Yu, Sakaguchi, Makoto, Yoshida, Kentaroh
We construct an example of supersymmetric Chern-Simons-matter theory with a matter field transforming as a singlet representation of the supersymmetry algebra, where the bosonic and fermionic degrees...
A family of super Schrodinger invariant Chern-Simons matter systems (2008)
Nakayama, Yu, Ryu, Shinsei, Sakaguchi, Makoto, Yoshida, Kentaroh
We investigate non-relativistic limits of the N=3 Chern-Simons matter system in 1+2 dimensions. The relativistic theory can generate several inequivalent super Schodinger invariant theories,...
Non-compact Mirror Bundles and (0,2) Liouville Theories (2008)
We study (0,2) deformations of N=2 Liouville field theory and its mirror duality. A gauged linear sigma model construction of the ultraviolet theory connects (0,2) deformations of Liouville field...
An Index for Non-relativistic Superconformal Field Theories (2008)
We study the highest-weight representation of N=2 supersymmetric Schrodinger algebra which appears in non-relativistic superconformal field theories in (1+2) dimension. We define the index for the...
We show a calculable example of stable supersymmetry (SUSY) breaking models with O(10) eV gravitino mass based on the combination of D-term gauge mediation and U(1)' mediation. A potential...
Moduli stabilization in stringy ISS models (2008)
We present a stringy realization of the ISS metastable SUSY breaking model with moduli stabilization. The mass moduli of the ISS model is stabilized by gauging of a U(1) symmetry and its D-term...
We further investigate the dimensional duality (D-duality) proposed in arXiv: 0705.0550 by mainly focusing on the properties of D-branes in this background. We derive the world-sheet correspondence...
SUSY Unparticle and Conformal Sequestering (2008)
We investigate unparticle physics with supersymmetry (SUSY). The SUSY breaking effects due to the gravity mediation induce soft masses for the SUSY unparticles and hence break the conformal...
Langlands duality in Liouville-H_3^+ WZNW correspondence (2008)
Giribet, Gaston, Nakayama, Yu, Nicolas, Lorena
We show a physical realization of the Langlands duality in correlation functions of H_3^+ WZNW model. We derive a dual version of the Stoyanovky-Riabult-Teschner (SRT) formula that relates the...
Dangerous Liouville Wave -- exactly marginal but non-conformal deformation (2008)
We give a non-trivially interacting field theory example of scale invariant but non-conformal field theory. The model is based on the exactly solvable Liouville field theory coupled with free scalars...
We show a calculable example of stable supersymmetry (SUSY) breaking models with O(10) eV gravitino mass based on the combination of D-term gauge mediation and U(1)' mediation. A potential problem of...
Moduli Stabilization in Stringy ISS Models (2007)
Nakayama, Yu, Yamazaki, Masahito, Yanagida, T. T.
We present a stringy realization of the ISS metastable SUSY breaking model with moduli stabilization. The mass moduli of the ISS model is stabilized by gauging of a U(1) symmetry and its D-term...
SUSY Unparticle and Conformal Sequestering (2007)
We investigate unparticle physics with supersymmetry (SUSY). The SUSY breaking effects due to the gravity mediation induce soft masses for the SUSY unparticles and hence break the conformal...
We further investigate the dimensional duality (D-duality) proposed in arXiv:0705.0550 by mainly focusing on the properties of D-branes in this background. We derive the world-sheet correspondence of...
Black Hole - String Transition and Rolling D-brane (2007)
We investigate the black hole - string transition in the two-dimensional Lorentzian black hole system from the exact boundary states that describe the rolling D-brane falling down into the...
Finite N Index and Angular Momentum Bound from Gravity (2007)
We exactly compute the finite N index and BPS partition functions for N=4 SYM theory in a newly proposed maximal angular momentum limit. The new limit is not predicted from the superconformal...
The Nothing at the Beginning of the Universe Made Precise (2006)
Nakayama, Yu, Rey, Soo-Jong, Sugawara, Yuji
We propose a new worldsheet approach to the McGreevy-Silverstein proposal: resolution of spacelike singularity via Scherk-Schwarz compactification and winding string condensation therein. Our...
Unitarity Meets Channel-Duality for Rolling / Decaying D-Branes (2006)
Nakayama, Yu, Rey, Soo-Jong, Sugawara, Yuji
Investigations for decay of unstable D-brane and rolling of accelerated D-brane dynamics have revealed that various proposed prescriptions give different result for spectral amplitudes and...
Index for Supergravity on AdS_5 \times T^{1,1} and Conifold Gauge Theory (2006)
We compute the index for the conifold gauge theory from type IIB supergravity (superstring) on AdS_5 \times T^{1,1}. We discuss its implication from the gauge theory viewpoint.
Index for Orbifold Quiver Gauge Theories (2005)
We compute the index for orbifold quiver gauge theories. We compare it with the results obtained from the type IIB supergravity (superstring) on AdS_5 \times S^5/\Gamma.
More on Conformally Sequestered SUSY Breaking (2005)
Ibe, M., Nakayama, Yu, Shinbara, Y., Yanagida, T.
We extend our models for conformal sequestering of dynamical supersymmetry breaking with decoupling vector-like matter in several different ways. These extensions enable us to simplify concrete model...
D-Brane Propagation in Two-Dimensional Black Hole Geometries (2005)
Nakayama, Yu, Rey, Soo-Jong, Sugawara, Yuji
We study propagation of D0-brane in two-dimensional Lorentzian black hole backgrounds by the method of boundary conformal field theory of SL(2,R)/U(1) supercoset at level k. Typically, such...
Conformally Sequestered SUSY Breaking in Vector-like Gauge Theories (2005)
Ibe, M., Nakayama, Yu, Shinbara, Y., Yanagida, T.
We provide, in a framework of vector-like gauge theories, concrete models for conformal sequestering of dynamical supersymmetry (SUSY) breaking in the hidden sector. If the sequestering is...
The Stoyanovsky-Ribault-Teschner Map and String Scattering Amplitudes (2005)
Recently, Ribault and Teschner pointed out the existence of a one-to-one correspondence between N-point correlation functions for the SL(2,C)_k/SU(2) WZNW model on the sphere and certain set of...
Rolling Down the Throat in NS5-brane Background: The Case of Electrified D-Brane (2004)
Nakayama, Yu, Panigrahi, Kamal L., Rey, Soo-Jong, Takayanagi, Hiromitsu
We study rolling radion dynamics of electrified D-brane in NS5-brane background, both in effective field theory and in full open string theory. We construct exact boundary states and, from them,...
Zamolodchikov relations and Liouville hierarchy in SL(2,R)_k WZNW model (2004)
Bertoldi, Gaetano, Bolognesi, Stefano, Giribet, Gaston, Matone, Marco, Nakayama, Yu
We study the connection between Zamolodchikov operator-valued relations in Liouville field theory and in the SL(2,R)_k WZNW model. In particular, the classical relations in SL(2,R)_k can be...
Crosscap states in N=2 Liouville theory (2004)
We construct crosscap states in the N = 2 Liouville theory from the modular bootstrap method. We verify our results by comparing it with the calculation from the minisuperspace approximation and by...
Boundary States for the Rolling D-branes in NS5 Background (2004)
Nakayama, Yu, Sugawara, Yuji, Takayanagi, Hiromitsu
In this paper we construct the time dependent boundary states describing the ``rolling D-brane solutions'' in the NS5 background discovered recently by Kutasov by means of the classical DBI analysis....
The Liouville Geometry of N=2 Instantons and the Moduli of Punctured Spheres (2004)
Bertoldi, Gaetano, Bolognesi, Stefano, Matone, Marco, Mazzucato, Luca, Nakayama, Yu
We study the instanton contributions of N=2 supersymmetric gauge theory and propose that the instanton moduli space is mapped to the moduli space of punctured spheres. Due to the recursive structure...
Liouville Field Theory -- A decade after the revolution (2004)
We review recent developments (up to January 2004) of the Liouville field theory and its matrix model dual. This review consists of three parts. In part I, we review the bosonic Liouville theory....
Tadpole Cancellation in Unoriented Liouville Theory (2003)
The tadpole cancellation in the unoriented Liouville theory is discussed. Using two different methods -- the free field method and the boundary-crosscap state method, we derive one-loop divergences....
Effective Gauge Degrees of Freedom and the (Non)existence of the Glueball Superpotential (2003)
We propose an efficient way to obtain a correct Veneziano-Yankielowicz type integration constant of the effective glueball superpotential $W_{eff}(S,g,\Lambda)$, even for massless theories. Applying...
Gravity Dual for Reggeon Field Theory and Non-linear Quantum Finance
We study scale invariant but not necessarily conformal invariant deformations of non-relativistic conformal field theories from the dual gravity viewpoint. We present the corresponding metric that...