Title | Quantum information processing in spin chains via quantum Zeno dynamics |
Publication Type | Journal Article |
Year of Publication | 2008 |
Authors | Monras, A, Romero-Isart, O |
Journal | arXiv |
Date Published | 01/2008 |
Keywords | spin chain |
Abstract | We show how the quantum Zeno effect can be exploited to control quantum information in a spin chain in a flexible way. In particular, we consider a one dimensional array of three level systems interacting via a swap operator, an interaction found in a generalized Heisenberg Hamiltonian. By encoding the qubit into two levels and using simple projective frequent measurements, the dynamics of the chain is guided to achieve basic quantum information manipulation tools, $\backslash$emph\{i.e.\}, quantum registers, single qubit operations and quantum state transfer on demand, while local addressability is not required. State transfer is perfect, robust against errors and delivers qubits at a constant rate, unconditional of the length of the transfer. Moreover, two dimensional lattices with tunable global interactions in different directions offer the possibility of performing two-qubit gates. |
URL | https://arxiv.org/abs/0801.1959 |
