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Journal articles on the topic 'Action string'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Akama, K. "Induced String Action." Progress of Theoretical Physics 80, no. 6 (1988): 935–40. http://dx.doi.org/10.1143/ptp.80.935.

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2

TSEYTLIN, A. A. "STRING THEORY EFFECTIVE ACTION: STRING LOOP CORRECTIONS." International Journal of Modern Physics A 03, no. 02 (1988): 365–95. http://dx.doi.org/10.1142/s0217751x88000138.

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We discuss the general ideology of the computation of string loop corrections to the effective action for the massless modes of the string. Both the S-matrix and the sigma-model approaches are presented. It is emphasized that the effective action is a more general and better defined object than the S-matrix. In particular, it is finite in spite of modular infinities that may be present in loop amplitudes computed near a “wrong” vacuum. The case of the disc topology in the open-closed string theory is treated in some detail. Some issues concerning the soft dilaton vertex operators related to th

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3

Hao, Jiangang, Zhan Shu, and Davier Alina Von. "Analyzing Process Data from Game/Scenario-Based Tasks: An Edit Distance Approach." Journal of Educational Data Mining 7, no. 1 (2015): 33–50. https://doi.org/10.5281/zenodo.3554706.

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Students' activities in game/scenario-based tasks (G/SBTs) can be characterized by a sequence of time-stamped actions of different types with different attributes. For a subset of G/SBTs in which only the order of the actions is of great interest, the process data can be well characterized as a string of characters (i.e., action string) if we encode each action name as a single character. In this article, we report our work on evaluating students' performances by comparing how far their action strings are from the action string that corresponds to the best performance, where the proximity is q

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4

KURIKI, R., S. OGUSHI, and A. SUGAMOTO. "DEFORMATION OF SCHILD STRING." Modern Physics Letters A 14, no. 17 (1999): 1123–31. http://dx.doi.org/10.1142/s0217732399001206.

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We attempt to construct new superstring actions with a D-plet of Majorana fermions [Formula: see text], where ℬ is the D-dimensional space–time index and A is the two-dimensional spinor index, by deforming the Schild action. As a result, we propose three kinds of actions: the first is invariant under N=1 (the worldsheet) supersymmetry transformation and the area-preserving diffeomorphism. The second contains the Yukawa type interaction. The last possesses some nonlocality because of bilinear terms of [Formula: see text]. The reasons why completing a Schild type superstring action with [Formula

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5

Arik, M., F. Neyzi, and Ö. Oǧuz. "Adorning the string action." Physics Letters B 178, no. 2-3 (1986): 205–6. http://dx.doi.org/10.1016/0370-2693(86)91496-6.

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6

Maharana, Jnanadeva. "Four dimensional string-string solutions and symmetries of string effective action." Physics Letters B 348, no. 1-2 (1995): 70–76. http://dx.doi.org/10.1016/0370-2693(95)00090-8.

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7

ROBERTS, MARK D. "THE STRING DEVIATION EQUATION." Modern Physics Letters A 14, no. 25 (1999): 1739–51. http://dx.doi.org/10.1142/s021773239900184x.

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It is well known that the relative motion of many particles can be described by the geodesic deviation equation. Less well known is that the geodesic deviation equation can be derived from the second covariant variation of the point particle's action. Here it is shown that the second covariant variation of the string action leads to a string deviation equation. This equation is a candidate for describing the relative motion of many strings, and can be reduced to the geodesic deviation equation. Like the geodesic deviation equation, the string deviation equation can also be expressed in terms o

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8

Baillie, C. F., and D. A. Johnston. "Modified Steiner functional string action." Physical Review D 45, no. 10 (1992): R3326—R3328. http://dx.doi.org/10.1103/physrevd.45.r3326.

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9

Fradkin, E. S., and A. A. Tseytlin. "Quantum string theory effective action." Nuclear Physics B 261 (January 1985): 1–27. http://dx.doi.org/10.1016/0550-3213(85)90559-0.

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10

Bitnaya, Denis, Pietro Conzinu, and Giovanni Marozzi. "On the stability of string-hole gas." Journal of Cosmology and Astroparticle Physics 2024, no. 01 (2024): 025. http://dx.doi.org/10.1088/1475-7516/2024/01/025.

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Abstract Focusing on a string-hole gas within the pre-big bang scenario, we study the stability of its solutions in the phase space. We firstly extend the analysis present in the literature relaxing the ideal-gas properties of the string-hole gas, taking into account a (bulk-) viscosity term. Then we consider the case of a theory described by a complete O(d,d)-invariant action up to all orders in α'-corrections (the Hohm-Zwiebach action), studying the stability of the string-hole gas solution with or without the introduction of the viscosity term. Furthermore, the bulk viscosity is also consid

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11

KUZENKO, S. M., and O. A. SOLOVIEV. "CHIRAL (SUPER) STRING ACTIONS." International Journal of Modern Physics A 05, no. 07 (1990): 1341–61. http://dx.doi.org/10.1142/s0217751x90000611.

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We present a covariant action describing chiral bosonic string theories in space-time dimensions d<26 and a covariant (1, 0) supersymmetric action describing heterotic string theories in space-time of dimension d<10. The anomaly cancellation conditions are found. In the four-dimensional case the supersymmetric action corresponds to the SO(44) heterotic string theory.

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12

Akama, K. "Pregeometry and an Extended String Action." Progress of Theoretical Physics 79, no. 6 (1988): 1299–304. http://dx.doi.org/10.1143/ptp.79.1299.

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13

Antoniadis, I., S. Hohenegger, and K. S. Narain. "topological amplitudes and string effective action." Nuclear Physics B 771, no. 1-2 (2007): 40–92. http://dx.doi.org/10.1016/j.nuclphysb.2007.02.011.

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14

Gregory, R. "Effective action for a cosmic string." Physics Letters B 206, no. 2 (1988): 199–204. http://dx.doi.org/10.1016/0370-2693(88)91492-x.

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15

Frolov, S. A. "Effective action for string field theory." Physics Letters B 229, no. 1-2 (1989): 37–40. http://dx.doi.org/10.1016/0370-2693(89)90151-2.

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16

Kumar, Alok, and Koushik Ray. "Ehlers transformations and string effective action." Physics Letters B 358, no. 3-4 (1995): 223–28. http://dx.doi.org/10.1016/0370-2693(95)01035-o.

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17

Preitschopf, Christian R., and Charles B. Thorn. "Action principle for subcritical string fields." Nuclear Physics B 349, no. 1 (1991): 132–58. http://dx.doi.org/10.1016/0550-3213(91)90191-y.

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18

BERGSHOEFF, ERIC. "SUPERSYMMETRIC STRING WAVES." International Journal of Modern Physics D 03, no. 01 (1994): 149–52. http://dx.doi.org/10.1142/s0218271894000162.

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We present plane-wave-type solutions to the superstring effective action which have unbroken space-time supersymmetries. They describe dilaton, axion and gauge fields in a generalization of the Brinkmann metric. A crucial property of the solutions is a conspiracy between the metric and the axion field. Furthermore, due to a relation between the geometry and the gauge fields, the α′ string corrections to the effective on-shell action and to the solutions themselves vanish. We call these solutions supersymmetric string waves.

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19

FAZIO, A. R., and G. K. SAVVIDY. "TWO-LOOP WORLDSHEET EFFECTIVE ACTION." Modern Physics Letters A 18, no. 39 (2003): 2817–28. http://dx.doi.org/10.1142/s0217732303012246.

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We are studying quantum corrections in the earlier proposed string theory based on worldsheet action which measures the linear sizes of the surfaces. At classical level the string tension is equal to zero and as it was demonstrated in the previous studies one loop correction to the classical worldsheet action generates Nambu–Goto area term, that is nonzero string tension. We extend this analysis computing the worldsheet effective action in the second order of the loop expansion. We are studying quantum corrections in the earlier proposed string theory based on worldsheet action which measures

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20

Yang, Fanghong, Gao Wang, Deping Li, Ning Liu, and Feiyan Min. "Research on Repetition Counting Method Based on Complex Action Label String." Machines 10, no. 6 (2022): 419. http://dx.doi.org/10.3390/machines10060419.

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Smart factories have real-time demands for the statistics of productivity to meet the needs of quick reaction capabilities. To solve this problem, a counting method based on our decomposition strategy of actions was proposed for complex actions. Our method needs to decompose complex actions into several essential actions and define a label string for each complex action according to the sequence of the essential actions. While counting, we firstly employ an online action recognition algorithm to transform video frames into label numbers, which will be stored in a result queue. Then, the label

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21

ROY, SHIBAJI. "On S DUALITY OF TOROIDALLY COMPACTIFIED TYPE IIB STRING EFFECTIVE ACTION." International Journal of Modern Physics A 13, no. 26 (1998): 4445–67. http://dx.doi.org/10.1142/s0217751x98002146.

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It has been shown recently that the toroidally compactified type IIB string effective action possesses an SL (2, R) invariance as a consequence of the corresponding symmetry in ten dimensions when the self-dual five-form field strength is set to zero. By working in the string frame we clarify how a Z2 subgroup of this SL (2, R) group responsible for producing the strong–weak coupling duality in the ten-dimensional theory produces the same symmetry for the reduced theory. In the absence of the full covariant action of type IIB supergravity theory, we show that the T-dual version of type IIA str

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22

GERASIMOV, A., D. LEBEDEV, and A. MOROZOV. "POSSIBLE IMPLICATIONS OF INTEGRABLE SYSTEMS FOR STRING THEORY." International Journal of Modern Physics A 06, no. 06 (1991): 977–88. http://dx.doi.org/10.1142/s0217751x91000538.

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A kind of program for the unification of conformal and two-dimensional integrable models is described. Integrable systems, defined by the condition of vanishing curvature (Lax representation), can be derived from universal generalizations of Wess-Zumino-Witten action, including one more integration (over spectral parameter λ). Such actions, in their turn, should be derivable from some membrane-like action, related to the Kirillov-Kostant form for some quantum two-loop Lie algebras (like complexification of Fairlie’s deformed algebra of two-dimensional area-preserving reparametrizations).

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23

Sathiapalan, B. "Gauge invariant action for the open bosonic string: tachyon action." Journal of High Energy Physics 2009, no. 07 (2009): 045. http://dx.doi.org/10.1088/1126-6708/2009/07/045.

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24

KUMAR, ALOK. "GAUGING OF T-DUALITY INVARIANT WORLDSHEET STRING ACTIONS." Modern Physics Letters A 09, no. 04 (1994): 299–307. http://dx.doi.org/10.1142/s0217732394000319.

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T-duality invariant worldsheet string actions, recently written down by Schwarz and Sen, are coupled to the worldsheet gauge fields. It is shown that the integration of the dual coordinates gives the conventional, vector, axial and chiral, gauged string actions for the appropriate choice of the gauged isometries. Alternatively, the gauge field integration is shown to give a T-duality invariant action which matches with the corresponding results known earlier.

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25

Wang, Xianren, Chuiwei Yang, Jiaqian Zhang, et al. "Study on the Wind Deviation Characteristics of Y-Type Insulator String under the Action of Strong Wind." Advances in Civil Engineering 2024 (February 8, 2024): 1–10. http://dx.doi.org/10.1155/2024/5542173.

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Under the action of extreme wind load, the overhead transmission line will generate a wind deflection flashover phenomenon, which seriously affects the normal operation of the transmission system and causes significant losses. Y-type insulator string (hereinafter referred to as Y-string) is an optimized structural form to reduce the wind deflection flashover in windy areas, and the dynamic mechanical characteristics of Y-string under the action of pulsating wind is an important factor that influences the design of the overhead transmission line. The calculation method of pulsating wind load an

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26

DEO, B. B. "FOUR-DIMENSIONAL SUPERGRAVITY FROM STRING THEORY." International Journal of Modern Physics A 21, no. 02 (2006): 237–49. http://dx.doi.org/10.1142/s0217751x06025365.

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A derivation of N = 1 supergravity action from string theory is presented. Starting from a Nambu–Goto bosonic string, matter field is introduced to obtain a superstring in four dimensions. The excitation quanta of this string contain graviton and the gravitino. Using the principle of equivalence, the action in curved space–time are found and the sum of them is the Deser–Zumino N = 1 supergravity action. The energy tensor is Lorentz invariant due to supersymmetry.

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27

MARSHAKOV, A. V. "EFFECTIVE BOUNDARY ACTION IN THE FERMIONIC STRING THEORY." Modern Physics Letters A 04, no. 21 (1989): 2041–47. http://dx.doi.org/10.1142/s021773238900229x.

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The Polyakov path integral on Riemann surfaces with boundaries for the Neveu-Schwarz-Ramond (NSR) fermionic string is computed in the case of a special choice of the local boundary conditions for the fermionic fields. Effective boundary action is written explicitly by means of the functions defined on the double of the surface. The obtained expressions are used to study the behavior of the string propagator in the configuration space. The generalization of the effective fermionic action to the case of nonarchimedean strings is discussed.

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28

Horowitz, Gary T., Joseph Lykken, Ryan Rohm, and Andrew Strominger. "Purely Cubic Action for String Field Theory." Physical Review Letters 57, no. 3 (1986): 283–86. http://dx.doi.org/10.1103/physrevlett.57.283.

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29

Kallosh, Renata, and J. Rahmfeld. "The GS string action on AdS5×S5." Physics Letters B 443, no. 1-4 (1998): 143–46. http://dx.doi.org/10.1016/s0370-2693(98)01281-7.

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30

Oda, Ichiro. "Super D-string action on AdS5×S5." Physics Letters B 444, no. 1-2 (1998): 127–35. http://dx.doi.org/10.1016/s0370-2693(98)01363-x.

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31

Eastop, Dinah. "String figures matter: Embodied knowledge in action." Craft Research 5, no. 2 (2014): 221–29. http://dx.doi.org/10.1386/crre.5.2.221_1.

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32

García-Bellido, J., and M. Quirós. "On the closed bosonic string effective action." Physics Letters B 247, no. 2-3 (1990): 280–88. http://dx.doi.org/10.1016/0370-2693(90)90897-f.

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33

Bergshoeff, Eric, Ingeborg Entrop, and Renata Kallosh. "Exact duality in the string effective action." Physical Review D 49, no. 12 (1994): 6663–73. http://dx.doi.org/10.1103/physrevd.49.6663.

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34

Tseytlin, A. A. "Covariant string field theory and effective action." Physics Letters B 168, no. 1-2 (1986): 63–69. http://dx.doi.org/10.1016/0370-2693(86)91461-9.

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35

Ivanov, B. V. "Functional equation for the string effective action." Physics Letters B 194, no. 3 (1987): 397–401. http://dx.doi.org/10.1016/0370-2693(87)91071-9.

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36

Sun, Xiang, Zong Zhi Yang, Yun Gang Liu, Mai Quan Zhang, and Yuan Fei Zhu. "Structure Dynamic Response Analysis of Pipe String under the Action of Perforating Detonation Wave." Advanced Materials Research 986-987 (July 2014): 887–90. http://dx.doi.org/10.4028/www.scientific.net/amr.986-987.887.

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Impact load of perforation will result in strong vibration of downhole string, string operated such as bending fracture accidents. Considering the clearance between string and casing, using space beam and spring element to solve the nonlinear contact problems between oil jacket, established the numerical model of string structure dynamic response analysis in horizontal well. Extracting downhole perforation pressure wave monitoring data, using the finite element software ANSYS, analyzed the dynamic response of the tubing under perforation of detonation shock wave impact, got the displacement of

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37

MAHARANA, JNANADEVA. "SYMMETRIES OF THE DIMENSIONALLY REDUCED STRING EFFECTIVE ACTION." Modern Physics Letters A 11, no. 01 (1996): 9–17. http://dx.doi.org/10.1142/s0217732396000035.

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A two-dimensional string effective action is obtained by dimensionally reducing the bosonic part of the 10-dimensional heterotic string effective action. It is shown that this effective action, with a few restrictions on some backgrounds, describes a two-dimensional model which admits an infinite sequence of nonlocal conserved currents.

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38

NESTERENKO, V. V., and I. G. PIROZHENKO. "OPEN RIGID STRING WITH GAUSS–BONNET TERM IN THE ACTION." Modern Physics Letters A 13, no. 31 (1998): 2513–22. http://dx.doi.org/10.1142/s0217732398002679.

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The effect of the Gaussian curvature in the rigid string action on the interquark potential is investigated. The linearized equations of motion and boundary conditions, following from the modified string action, are obtained. The equation which defines the eigen-frequency spectrum of the string oscillations is derived. On this basis the interquark potential generated by the string is calculated in one-loop approximation. A substantial influence of the topological term in the string action on the interquark potential at the distances of order of hadronic size or less is revealed.

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39

SEN, ASHOKE. "STRONG–WEAK COUPLING DUALITY IN FOUR-DIMENSIONAL STRING THEORY." International Journal of Modern Physics A 09, no. 21 (1994): 3707–50. http://dx.doi.org/10.1142/s0217751x94001497.

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We present several pieces of evidence for strong–weak coupling duality symmetry in the heterotic string theory, compactified on a six-dimensional torus. They include symmetry of the (1) low energy effective action, (2) allowed spectrum of electric and magnetic charges in the theory, (3) allowed mass spectrum of particles saturating the Bogomol'nyi bound, and (4) Yukawa couplings between massless neutral particles and massive charged particles saturating the Bogomol'nyi bound. This duality transformation exchanges the electrically charged elementary string excitations with the magnetically char

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40

KARKOWSKI, J., P. WȨGRZYN, and Z. ŚWIERCZYŃSKI. "NAMBU-GOTO STRING ACTION WITH GAUSS-BONNET TERM." Modern Physics Letters A 11, no. 28 (1996): 2309–16. http://dx.doi.org/10.1142/s0217732396002290.

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We examine the relativistic Nambu-Goto model with Gauss-Bonnet boundary term added to the action integral. The dynamical system is analyzed using an invariant representation of string degrees of freedom by complex Liouville fields. The solutions of classical equations of motion for open strings are described.

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41

KAMANI, DAVOUD. "T-DUALITY AND NONCOMMUTATIVE DBI ACTION." Modern Physics Letters A 17, no. 04 (2002): 237–43. http://dx.doi.org/10.1142/s021773230200645x.

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In this paper we study the noncommutative description of the DBI Lagrangian and its T-dual counterpart. We restrict the freedoms of the noncommutativity parameters of these Lagrangians. Therefore the noncommutativity parameter, the effective metric, the effective coupling constant of the string and the extra modulus [Formula: see text] of the effective T-dual theory, can be expressed in terms of the closed string variables g, B, gs and the noncommutativity parameter of the effective theory of open string.

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42

S Bakry, A., X. Chen, M. Deliyergiyev, A. Galal, A. Khalaf, and P. M Pengming. "Stiff self-interacting strings at high temperature QCD." EPJ Web of Conferences 175 (2018): 12004. http://dx.doi.org/10.1051/epjconf/201817512004.

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We investigate the implications of Nambu-Goto (NG), Lüscher Weisz (LW) and Polyakov-Kleinert (PK) effective string actions for the Casimir energy and the width of the quantum delocalization of the string in 4-dim pure SU(3) Yang-Mills lattice gauge theory. At a temperature closer to the critical point T/Tc=0.9, we found that the next to leading-order (NLO) contributions from the expansion of the NG string in addition to the boundary terms in LW action to decrease the deviations from the lattice data in the intermediate distance scales for both the quark-antiquark QQ̅ potential and broadening o

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43

GRATS, YU V., A. A. ROSSIKHIN, and A. O. SBOICHAKOV. "CHIRAL STRING IN A CURVED SPACE: GRAVITATIONAL SELF-ACTION." Modern Physics Letters A 16, no. 11 (2001): 725–30. http://dx.doi.org/10.1142/s021773230100353x.

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We analyze the effective action describing the linearized gravitational self-action for a classical superconducting string in a curved space–time. It is shown that the divergent part of the effective action is equal to zero for both Nambu–Goto and chiral super-conducting strings.

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44

LIU, LU-XIN, and MUNETO NITTA. "NON-ABELIAN VORTEX-STRING DYNAMICS FROM NONLINEAR REALIZATION." International Journal of Modern Physics A 27, no. 18 (2012): 1250097. http://dx.doi.org/10.1142/s0217751x12500972.

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The dynamics of the non-Abelian vortex-string, which describes its low energy oscillations into the target D = 3+1 space–time as well as its orientations in the internal space, is derived by the approach of nonlinear realization. The resulting action correlating these two sectors is found to have an invariant synthesis form of the Nambu–Goto-CPN-1 model actions. Higher order corrections to the vortex actions are presented up to the order of quartic derivatives. General p-brane dynamics in terms of the internal symmetry breaking is also discussed.

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45

SEN, ASHOKE. "TACHYON DYNAMICS IN OPEN STRING THEORY." International Journal of Modern Physics A 20, no. 24 (2005): 5513–656. http://dx.doi.org/10.1142/s0217751x0502519x.

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In this review we describe our current understanding of the properties of open string tachyons on an unstable D-brane or brane–antibrane system in string theory. The various string theoretic methods used for this study include techniques of two-dimensional conformal field theory, open string field theory, boundary string field theory, noncommutative solitons, etc. We also describe various attempts to understand these results using field theoretic methods. These field theory models include toy models like singular potential models and p-adic string theory, as well as more realistic version of t

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46

FUJISHIRO, TAKEHIKO T., MITSUO J. HAYASHI, and SHOJI TAKESHITA. "ARE THE COSMIC STRINGS SEEN AS THE DISLOCATIONS?" Modern Physics Letters A 06, no. 24 (1991): 2237–42. http://dx.doi.org/10.1142/s0217732391002463.

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The effective action from the heterotic string compactification is studied on the manifolds with absolute parallelism. The cosmic string solutions resulting from the effective action are discussed in analogy with the dislocations in 3-dimensional crystalline solid. The cosmic string density is concluded to be given by the torsion tensor of space-time, which gives rise to a compactification at least in 1-dimensional direction in space-time. It is also shown that the contorsion tensor defines the deficit angle. We have found a stringy solution in a 6-dimensional model on M4 × T2 which coincides

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47

AVAN, JEAN, and ANTAL JEVICKI. "STRING FIELD ACTIONS FROM W∞." Modern Physics Letters A 07, no. 04 (1992): 357–70. http://dx.doi.org/10.1142/s0217732392000306.

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Starting from W∞ as a fundamental symmetry and using the coadjoint orbit method, we derive an action for one-dimensional strings. It is shown that on the simplest non-trivial orbit this gives the single scalar collective field theory. On higher orbits one finds generalized KdV type field theories with increasing number of components.

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48

ANTONOV, D. V. "FLUCTUATING STRINGS IN THE UNIVERSAL CONFINING STRING THEORY AND GLUODYNAMICS." Modern Physics Letters A 13, no. 08 (1998): 581–92. http://dx.doi.org/10.1142/s0217732398000632.

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An effective string theory emerging from the bilocal approximation to the method of vacuum correlators in gluodynamics is shown to be well-described by the 4D theory of the massive Abelian Kalb–Ramond field interacting with the string, which is known to be the low energy limit of the universal confining string theory. This correspondence follows from the agreement of the behavior of the coefficient functions, which parametrize the gauge-invariant correlator of two gluonic field strength tensors, known from the lattice data, with their values obtained from the propagator of the Kalb–Ramond fiel

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49

Bliard, Gabriel, Ilaria Costa, and Valentina Forini. "Holography on the lattice: the string worldsheet perspective." European Physical Journal Special Topics 232, no. 3 (2023): 339–53. http://dx.doi.org/10.1140/epjs/s11734-023-00769-w.

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AbstractWe review the study, on the lattice, of the Green–Schwarz gauge-fixed string action describing worldsheet fluctuations about the minimal surface holographically dual to the null cusp Wilson loop, useful to evaluate the cusp anomaly of $${\mathcal {N}}=4$$ N = 4 super Yang–Mills (sYM). We comment on discretization, numerical explorations and challenges for the nonperturbative study of this benchmark model of gauge-fixed worldsheet actions.

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50

GAITE, J. "RENORMALIZATION GROUP EQUATION AND EFFECTIVE ACTION IN STRING THEORY." Modern Physics Letters A 04, no. 10 (1989): 941–51. http://dx.doi.org/10.1142/s0217732389001118.

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The connection between the renormalization group for the σ-model effective action for the Polyakov string and the S-matrix generating functional for dual amplitudes is studied. A more general approach to the renormalization group equation for string theory is proposed.

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