Address: | Office 4.6
Department of Physics and Astronomy University of Basel Klingelbergstrasse 82 CH-4056 Basel, Switzerland |

e-mail: | Massoud.Borhani@unibas.ch |

phone (office): | +41 61 267 3744 |

fax: | +41 61 267 1349 |

1- Spin Manipulation and Decoherence in Quantum Dots

2- Physical Realization of the One-way and Holonomic Quantum Computation

1- Fermi and Non-Fermi Liquid Theory

2- Nonanalytic Corrections to the Fermi Liquid Behavior

1- Classical Brane Worlds in Cosmology

2- Brans-Dicke Theories in Dimensions Higher Than 4

3- Field Dependence of the Gravitational Constant in Einstein's Equations

1- Alternative Interpretations of Quantum Mechanics (esp. Bohmian Mechanics)

2- Measurement Problem in Quantum Mechanics

3- Classical Limit

BSc. in Physics, Sharif University, Tehran, Iran (2002)

MSc. in Physics, University of Basel, Switzerland (2004)

PhD. in Physics, University of Basel, Switzerland (2008)

Björn Trauzettel, Massoud Borhani, Mircea Trif, Daniel Loss

JPSJ Special Topics: Advances in Spintronics.

J. Phys. Soc. Jpn.

Vitaly N. Golovach, Massoud Borhani, Daniel Loss

Phys. Rev. B

An alternating electric field, applied to a ``spin 1/2'' quantum dot, couples to the electron spin via the spin-orbit interaction. We analyze different types of spin-orbit couplings known in the literature and find that an electric dipole spin resonance (EDSR) scheme for spin manipulation can be realized with the up-to-date experimental setups. In particular, for the Rashba and Dresselhaus spin-orbit couplings, a fully transverse effective magnetic field arises in the presence of a Zeeman splitting in the lowest order of spin-orbit interaction. Spin manipulation and measurement of the spin decoherence time T_2 are straightforward in lateral GaAs quantum dots through the use of EDSR.

Massoud Borhani, Vitaly N. Golovach, Daniel Loss

Phys. Rev. B

We consider a mechanism of spin decay for an electron spin in a quantum dot due to coupling to a nearby quantum point contact (QPC) with and without an applied bias voltage. The coupling of spin to charge is induced by the spin-orbit interaction in the presence of a magnetic field. We perform a microscopic calculation of the effective Hamiltonian coupling constants to obtain the QPC-induced spin relaxation and decoherence rates in a realistic system. This rate is shown to be proportional to the shot noise of the QPC in the regime of large bias voltage and scales as "a

Massoud Borhani, Daniel Loss

Phys. Rev. A

We show that a special type of entangled states, cluster states, can be created with Heisenberg interactions and local rotations in 2d steps where d is the dimension of the lattice. We find that, by tuning the coupling strengths, anisotropic exchange interactions can also be employed to create cluster states. Finally, we propose electron spins in quantum dots as a possible realization of a one-way quantum computer based on cluster states.

Massoud Borhani, Reza Mansouri, Samad Khakshournia

Int. J. Mod. Phys. A

We consider a spherical thick 3-brane immersed in a five-dimensional bulk spacetime. We demonstrate how the thick brane equation of motion expanded in powers of the thickness of the brane can be obtained from the expected junction conditions on the boundaries of thick brane with the two embedding spacetimes. It is shown that the finite thickness leads to a faster collapse of the spherical shell.