我们重新计算了在arXiv：0807.1527中开始的对AdS_4 x CP^3上IIA型弦态pp波能量的曲率修正。利用arXiv：0912.2257中的近pp波哈密顿量，我们计算了一组1/R^2阶玻色弦态能量的第一个非零修正，其中R是背景的曲率半径。主要的曲率修正在汉密尔顿中产生了三次项（1/R阶）和四次项（1/R^2阶），我们对此实施了适当的正常排序规定。考虑到所有可能的费米子和玻色子弦态的贡献，我们发现模数之和存在对数偏差，从而抵消了三次和四次Hamilton量。我们表明，立方哈密顿量自然要求的截止求和重模式必须是轻模式的两倍。在此条件下，进入磁振子色散关系的强弱耦合插值函数h（λ）不受单圈修正，与代数曲线谱一致。然而，单磁振子色散关系表现出有限尺寸的指数修正。
英文摘要：
We revisit the calculation of curvature corrections to the pp-wave energy of type IIA string states on AdS_4 x CP^3 initiated in arXiv:0807.1527. Using the near pp-wave Hamiltonian found in arXiv:0912.2257, we compute the first non-vanishing correction to the energy of a set of bosonic string states at order 1/R^2, where R is the curvature radius of the background. The leading curvature corrections give rise to cubic, order 1/R, and quartic, order 1/R^2, terms in the Hamiltonian, for which we implement the appropriate normal ordering prescription. Including the contributions from all possible fermionic and bosonic string states, we find that there exist logarithmic divergences in the sums over mode numbers which cancel between the cubic and quartic Hamiltonian. We show that the cubic Hamiltonian naturally requires that the cutoff for summing over heavy modes must be twice the one for light modes. With this prescription the strong-weak coupling interpolating function h(λ), entering the magnon dispersion relation, does not receive a one-loop correction, in agreement with the algebraic curve spectrum. However, the single magnon dispersion relation exhibits finite-size exponential corrections.
We describe the pure spinor string in the $AdS_5\times S^5$ using unconstrained matrices first used by Roiban and Siegel for the Green-Schwarz superstring.
The so called one-parameter (often called $\varkappa$) deformed $AdS$ string sigma models have attracted a lot of attention lately in the study of integrability in string theory. We construct various circular string solutions in the $(AdS_3 \times S^3)_{\varkappa}$ background and describe the characteristics of such solutions qualitatively. We study the Bohr-Sommerfeld like quantization for these string states to characterise the motion. Further we find a `long' string limit of such circular strings in the $\varkappa$-deformed $AdS_3$ and find a novel dependence of the oscillation number on th…
Conformal SO(2,4) Transformations for the Helical AdS String Solution
通过将共形SO（2，4）变换应用于由AdS_3 x S^1中的螺旋弦解给出的具有一定极限的双自旋折叠旋转弦构型，我们构造了新的弦解，其能量-自旋关系由boost参数表征.通过选取两个适当的boost参数，进行两次SO（2，4）变换，在长弦极限下，AdS_3中的单自旋直折叠旋转弦解被变换为长刺弦解，其表达式由AdS_3中的螺旋弦解通过模参数为1的限制给出.
We study non-relativistic limit of AdS(5)xS(5) background and determine corresponding Newton-Cartan fields. We also find canonical form of the new non-relativistic string in this background and discuss its formulation in the uniform light-cone gauge.
Spinning strings in AdS_5 x S^5: A worldsheet perspective
我们研究了领先的Regge弦状态相关的半经典自旋弦的解决方案。利用初等RNS技术，构造了描述具有五种形式通量的时空中的大质量NSNS弦的有效拉格朗日量中的二次项。然后我们研究了AdS_5 × S ^5的特殊情况，发现AdS的“能量”（E_0）与AdS的自旋（S）、球的自旋（J）和球的轨道角动量（\nabla_a \nabla^a）的关系。
We consider computational complexity of AdS_5 black holes. Our system contains a particle moving on the boundary of AdS. This corresponds to the insertion of a fundamental string in AdS_5 bulk spacetime. Our results give a constraint for complexity. This gives us a hint for defining complexity in quantum field theories.
$AdS_3$ string theory in the stringy regime $k=(R_{AdS}/\ell_{str})^2 < 1$ provides a laboratory for the study of holography in which both sides of AdS/CFT duality are under fairly good control. Worldsheet string theory is solvable, and for closed strings the dual spacetime CFT is a deformation of a symmetric product orbifold. Here we extend this construction to include open strings by adding a probe D-string, described semi-classically by an $AdS_2$ D-brane in $AdS_3$. The dual defect or boundary conformal field theory (BCFT) is again a deformed symmetric product, which now describes the Fock…
We review some recent progress in understanding the spectrum of energies/dimensions of strings/operators in AdS5 x S5 -- planar N=4 super Yang-Mills correspondence. We consider leading strong coupling corrections to the energy of lightest massive string modes in AdS5 x S5, which should be dual to members of the Konishi operator multiplet in the SYM theory. This determines the general structure of strong-coupling expansion of the anomalous dimension of the Konishi operator. Following arXiv:0906.4294 we use 1-loop results for semiclassical string states to extract information about the leading c…
Generalized cusp in AdS_4 x CP^3 and more one-loop results from semiclassical strings
我们计算了基本弦的精确单圈配分函数，这些弦的世界表面终止于AdS_4边界的一个尖点上，并且在CP ^[3]中有一个“跳跃”。这使我们能够在σ模型微扰理论中提取ABJM广义尖点反常维数Gamma_{cusp} ^{ABJM}（phi，theta）直到NLO的弦预测。通过类似的分析，我们给出了在AdS_4 x CP^3和AdS_3 x S^3 x S^3 x S^1背景中运动的折叠闭弦解的精确配分函数。将先前为AdS_5 x S^5对应物开发的工具应用于与AdS_4/CFT_3和AdS_3/CFT_2对应物相关的弦解，得到了结果。
We use Dirac-Born-Infeld action to study the spinning D-string in $AdS_3 $ background in the presence of both NS-NS and RR fluxes. We compute the scaling relation between the energy (E) and spin (S) in the `long string limit'. The energy of these spiky string is found to be a function of spin with the leading logarithmic behaviour and the scaling relation appears to be independent of the amount of flux present. We further discuss folded D-string solutions in $AdS_3$ background with pure NS-NS and R-R fluxes.
We study a general class of spinning pulsating strings in $(AdS_5 \times S^5)_{\varkappa}$ background. For these family of solitons, we examine the scaling relation between the energy, spin or angular momentum. We verify that in $\varkappa \rightarrow 0 $ limit these relations reduce to the undeformed $AdS_5 \times S^5$ case. We further study an example of a string which is spinning in the $\varkappa$-deformed AdS$_5$ and S$^5$ simultaneously and find out the scaling relation among various conserved charges.
In this Letter, we explore nonrelativistic string solutions in various subsectors of the $ SU(1,2|3) $ SMT strings that correspond to different spin groups and satisfy the respective BPS bounds. In particular, we carry out an explicit analysis on rotating string solutions in the light of recently proposed SMT limits. We explore newly constructed SMT limits of type IIB (super) strings on $ AdS_5 \times S^5 $ and estimate the corresponding leading order stringy corrections near the respective BPS bounds.
