https://doi.org/10.1140/epjd/e2013-40161-y
Regular Article
Perfect transfer of quantum states in a network of harmonic oscillators
1
Centro Federal de Educação Tecnológica do Rio de
Janeiro, Av. Maracanã
229, 20.271-110, Rio de
Janeiro, RJ,
Brazil
2
Centro Brasileiro de Pesquisas Físicas,
Rua Dr. Xavier Sigaud 150,
22.290-180, Rio de Janeiro, RJ, Brazil
3
Instituto de Física, Universidade Federal de Goiás,
P.O. Box-131, 74.001-970, Goiania, GO,
Brazil
a
e-mail: sbd@cbpf.br
Received: 22 March 2013
Received in final form: 14 May 2013
Published online: 24 July 2013
This work presents an exactly soluble scheme to address the problem of optimal transfer of quantum states through a set of s harmonic oscillators composing a network with connected ends as a closed quantum circuit. For this purpose we start from a general quadratic Hamiltonian form. The relationship between the parameters of the Hamiltonian, the network size, and the time interval required for such transfer are explicitly shown. Particular physical realizations of this Hamiltonian, transfer of entangled states, including transfer of states at the expense of a quantum entanglement, are also considered.
Key words: Quantum Information
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2013
