## T.Hakobyan, A.Nersessian

**Lobachevsky geometry of (super)conformal mechanics**| Phys. Lett. A373 (2009), 1001-1004

Associate Professor | Faculty of Physics - Academician Gourgen Sahakyan's Chair of Theoretical Physics

Antiferromagnetic ordering of energy levels for spin ladder with four-spin cyclic exchange
| Phys. Rev. B 78, 012407 (2008) |

Energy-level ordering and ground-state quantum numbers for frustrated two-leg spin-1/2 ladder
| Phys. Rev. B 75, 214421 (2007) |

The ordering of energy levels for SU(n) symmetric antiferromagnetic chains
| Nucl. Phys. B 699, 575-594 (2004) |

Phase diagram of the frustrated two-leg ladder model
| Phys. Rev. B 63, 144433-144449 (2001) |