Zobrazeno 1 - 10
of 157
pro vyhledávání: '"Pi, S. Y."'
Autor:
Jackiw, R., Pi, S. Y.
Over half century ago Carl Brans participated in the construction of a viable deformation of the Einstein gravity theory. Their suggestion involves expanding the tensor-based theory by a scalar field. But experimental support has not materialized. Ne
Externí odkaz:
http://arxiv.org/abs/1511.00994
Autor:
Jackiw, R., Pi, S. -Y.
Extending previous work on 2 -- and 3 -- point functions, we study the 4 -- point function and its conformal block structure in conformal quantum mechanics CFT$_1$, which realizes the SO(2,1) symmetry group. Conformal covariance is preserved even tho
Externí odkaz:
http://arxiv.org/abs/1205.0443
Autor:
Jackiw, R., Pi, S. -Y.
Zero modes arising from a planar Majorana equation in the presence of $N$ vortices require an $\mathcal{N}$-dimensional state-space, where $\mathcal{N} = 2^{N/2}$ for $N$ even and $\mathcal{N} = 2^{(N + 1)/2}$ for $N$ odd. The mode operators form a r
Externí odkaz:
http://arxiv.org/abs/1109.4580
A 0+1-dimensional candidate theory for the CFT$_1$ dual to AdS$_2$ is discussed. The quantum mechanical system does not have a ground state that is invariant under the three generators of the conformal group. Nevertheless, we show that there are oper
Externí odkaz:
http://arxiv.org/abs/1106.0726
Autor:
Jackiw, R., Pi, S. -Y.
Publikováno v:
J.Phys.A44:223001,2011
We review the relation between scale and conformal symmetries in various models and dimensions. We present a dimensional reduction from relativistic to non-relativistic conformal dynamics.
Comment: Addendum added that includes author S.-H. Ho; S
Comment: Addendum added that includes author S.-H. Ho; S
Externí odkaz:
http://arxiv.org/abs/1101.4886
Publikováno v:
Phys.Rev.B81:224515,2010
A Dirac-type matrix equation governs surface excitations in a topological insulator in contact with an s-wave superconductor. The order parameter can be homogenous or vortex valued. In the homogenous case a winding number can be defined whose non-van
Externí odkaz:
http://arxiv.org/abs/1001.2760
Publikováno v:
Phys. Rev. B 80, 033413 (2009)
The effect of vacuum polarization in the field of an infinitesimally thin solenoid at distances much larger than the radius of solenoid is investigated. The induced charge density and induced current are calculated. Though the induced charge density
Externí odkaz:
http://arxiv.org/abs/0904.2046
Autor:
Jackiw, R., Pi, S. -Y.
A recently constructed model for low lying excitations in bilayer graphene exhibits mid-gap, zero energy modes in its Dirac-like spectrum, when a scalar order parameter takes a vortex profile. We show that these modes persist when the dynamics is ext
Externí odkaz:
http://arxiv.org/abs/0808.1562
Autor:
Jackiw, R., Pi, S. -Y.
We construct a chiral gauge theory to describe fractionalization of fermions in graphene. Thereby we extend a recently proposed model, which relies on vortex formation. Our chiral gauge fields provide dynamics for the vortices and also couple to the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0701760
Autor:
Pi, S. -Y.
Models of Lorentz/diffeomorphism violation frequently make use of a time-dependent scalar field. We investigate space-times produced by such a field.
Comment: Presented at PASCOS Meeting 2005
Comment: Presented at PASCOS Meeting 2005
Externí odkaz:
http://arxiv.org/abs/gr-qc/0509037