59 citations
13 papers · 1 filter
Geometric phases and quantum phase transitions in open systems
Alexander I. Nesterov, S. G. Ovchinnikov
The relationship between quantum phase transition and complex geometric phase for open quantum system governed by the non-Hermitian effective Hamiltonian with the accidental crossi…
Quantum light depolarization: the phase-space perspective
A. B. Klimov, J. L. Romero, L. L. Sanchez-Soto +2
Quantum light depolarization is handled through a master equation obtained by coupling dispersively the field to a randomly distributed atomic reservoir. This master equation is so…
Simulation of Grover's quantum search algorithm in a Ising nuclear spin chain quantum computer with first and second nearest neighbour couplings
G. V. Lopez, T. Gorin, L. Lara
We implement Grover's quantum search algorithm on a nuclear spin chain quantum computer, taking into Ising type interactions between nearest and second nearest neighbours into acco…
Ambiguities on the Hamiltonian formulation of the free falling particle with quadratic dissipation
Gustavo Lopez, Pablo Lopez, Xaman-Ek Lopez +1
For a free falling particle moving in a media which has quadratic velocity force effect on the particle, two equivalent constants of motion, with units of energy, two Lagrangians,…
Geometrical approach to mutually unbiased bases
A. B. Klimov, J. L. Romero, G. Bjork +1
We propose a unifying phase-space approach to the construction of mutually unbiased bases for a two-qubit system. It is based on an explicit classification of the geometrical struc…
Decoherence of an -qubit quantum memory
Thomas Gorin, Carlos Pineda, Thomas H. Seligman
We analyze decoherence of a quantum register in the absence of non-local operations i.e. of non-interacting qubits coupled to an environment. The problem is solved in terms of…