@article{oai:tsukuba.repo.nii.ac.jp:00052189, author = {伊敷, 吾郎 and ISHIKI, Goro and Asakawa, Tsuguhiko and Matsumoto, Takaki and Matsuura, So and Muraki, Hisayoshi}, issue = {6}, journal = {Progress of Theoretical and Experimental Physics}, month = {Jun}, note = {There is a difficulty in defining the positions of the D-branes when the scalar fields on them are non-Abelian. We show that we can use tachyon condensation to determine the position or the shape of D0-branes uniquely as a commutative region in spacetime together with a non-trivial gauge flux on it, even if the scalar fields are non-Abelian. We use the idea of the so-called coherent state method developed in the field of matrix models in the context of the tachyon condensation. We investigate configurations of non-commutative D2-brane made out of D0-branes as examples. In particular, we examine a Moyal plane and a fuzzy sphere in detail, and show that whose shapes are commutative R2 and S2⁠, respectively, equipped with uniform magnetic flux on them. We study the physical meaning of this commutative geometry made out of matrices, and propose an interpretation in terms of K-homology.}, title = {Commutative geometry for non-commutative D-branes by tachyon condensation}, volume = {2018}, year = {2018}, yomi = {イシキ, ゴロウ} }