Tamiaki Yoneya
University of Tokyo
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Publication
Featured researches published by Tamiaki Yoneya.
Journal of High Energy Physics | 2001
Hidetoshi Awata; Miao Li; Djordje Minic; Tamiaki Yoneya
We present several non-trivial examples of the three-dimensional quantum Nambu bracket which involve square matrices or three-index objects. Our examples satisfy two fundamental properties of the classical Nambu bracket: they are skew-symmetric and they obey the Fundamental Identity. We contrast our approach to the existing literature on the quantum deformations of Nambu mechanics. We also discuss possible applications of our results in M-theory.
Progress of Theoretical Physics | 2000
Tamiaki Yoneya
The notion of a space-time uncertainty principle in string theory is clarified and further developed. The motivation and the derivation of the principle are first reviewed in a reasonably self-contained way. It is then shown that the nonperturbative (Borel summed) high-energy and high-momentum transfer behavior of string scattering is consistent with the space-time uncertainty principle. It is also shown that, as a consequence of this principle, string theories in 10 dimensions generically exhibit a characteristic length scale which is equal to the well-known 11 dimensional Planck length g 1/3 s
Modern Physics Letters A | 1989
Tamiaki Yoneya
The existence of a minimal observable length in fundamental string theories has been suggested from recent investigations of the string amplitudes under various extreme conditions. Several observations about the interpretation of this phenomenon are presented. In particular, a new kind of dual indeterminacy relation is suggested as a possible basis of quantum string geometry.
Physical Review Letters | 1997
Miao Li; Tamiaki Yoneya
We argue that the space-time uncertainty relation of the form ∆X∆T ∼ α′ for the observability of the distances with respect to time, ∆T , and space, ∆X, is universally valid in string theory including D-branes. This relation has been previously proposed by one (T.Y.) of the present authors as a simple qualitative representation of the perturbative short distance structure of fundamental string theory. We show that the relation, combined with the usual quantum mechanical uncertainty principle, explains the key qualitative features of D-particle dynamics. Typeset using REVTEX ∗[email protected] †[email protected]
Nuclear Physics | 1999
Yuji Okawa; Tamiaki Yoneya
Abstract We present detailed analyses of the 3-body interactions of D-particles from both sides of 11-dimensional supergravity and Matrix theory. In supergravity, we derive a complete expression for the classical bosonic effective action for D-particles including 2-and 3-body interaction terms. In Matrix theory, we compute 1-particle irreducible contributions to the eikonal phase shift in the two-loop approximation. The results precisely agree with the predictions from supergravity and thus provide a strong support to the discrete light-cone interpretation of the Matrix-theory conjecture as a possible non-perturbative definition of M-theory.
Lettere Al Nuovo Cimento | 1973
Tamiaki Yoneya
It is demonstrated that the quautum theory of gravity can be a zero- slope limit of the generalized Virasoro model where the Regge intercept is fixed at two. The quautum theory of gravity is taken to mean Gupta-Feynmans perturbation on the flat background. The correspondence for the graviton Compton scattering is demonstrated by direct calculations. (LBS)
Nuclear Physics | 2005
Suguru Dobashi; Tamiaki Yoneya
The issue of holographic mapping between bulk and boundary in the plane-wave limit of AdS/SYM correspondence is reexamined from the viewpoint of correlation functions. We first study the limit of large angular momentum for the so-called GKP-W relation in supergeravity approximation, connecting directly the effective action in the bulk and the generating functional of correlation functions on the boundary. The spacetime tunneling picture which has been proposed in our previous works naturally emerges. This gives not only a justification of our previous proposal, with some important refinements, on the mapping between bulk effective interaction and the CFT coefficients on the boundary in the plane-wave limit, but also implies various insights on the interpretation of holography in the plane-wave limit. Based on this result, we construct a new ‘holographic’ string field theory. We confirm for several nontrivial examples that this gives the CFT coefficients derived by perturbation theory on the gauge-theory side. Our results are useful for understanding how apparently different duality maps proposed from different standpoints are consistent with each other and with our definite spacetime picture for the AdS holography in the plane-wave limit. ∗ e-mail address: [email protected] † e-mail address: [email protected]
Nuclear Physics | 2003
Suguru Dobashi; Hidehiko Shimada; Tamiaki Yoneya
The recent proposal on the correspondence between the N = 4 super Yang-Mills theory and string theory in the Penrose limit of the AdS5×S 5 geometry involves a few puzzles from the viewpoint of holographic principle, especially in connection with the interpretation of times. To resolve these puzzles, we propose to interpret the PP-wave strings on the basis of tunneling null geodesics connecting boundaries of the AdS geometry. Our approach predicts a direct and systematic identification of the S-matrix of Euclidean string theory in the bulk with the short-distance structure of correlation functions of super Yang-Mills theory on the AdS boundary, as an extension of the ordinary relation in supergravity-CFT correspondence. Holography requires an infinite number of contact terms for interaction vertices of string field theory and constrains their forms in a way consistent with supersymmetry. ∗ e-mail address: [email protected] † e-mail address: [email protected] ‡ e-mail address: [email protected]
Physical Review D | 1999
Antal Jevicki; Yoichi Kazama; Tamiaki Yoneya
We study in detail the extension of the generalized conformal symmetry proposed previously for D-particles to the case of supersymmetric Yang-Mills matrix models of
Nuclear Physics | 1994
Antal Jevicki; Tamiaki Yoneya
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