318 citations · 4.4k across the 146 of their papers we have counts for
5 papers · 2 filters
Multipartite purification protocols: upper and optimal bounds
Alastair Kay, Jiannis K. Pachos
A method for producing an upper bound for all multipartite purification protocols is devised, based on knowing the optimal protocol for purifying bipartite states. When applied to…
Single atom quantum walk with 1D optical superlattices
Jaewoo Joo, P. L. Knight, Jiannis K. Pachos
A proposal for the implementation of quantum walks using cold atom technology is presented. It consists of one atom trapped in time varying optical superlattices. The required elem…
Optimal purification of thermal graph states
Alastair Kay, Jiannis K. Pachos, Wolfgang Dür +1
In this paper, a purification protocol is presented and its performance is proven to be optimal when applied to a particular subset of graph states that are subject to local Z-nois…
The Wavefunction of an Anyon
Jiannis K. Pachos
We consider a two-dimensional spin system in a honeycomb lattice configuration that exhibits anyonic and fermionic excitations [Kitaev, cond-mat/0506438]. The exact spectrum that c…
Geometric phases and criticality in spin systems
Jiannis K. Pachos, Angelo C. M. Carollo
A general formalism of the relation between geometric phases produced by circularly evolving interacting spin systems and their criticality behavior is presented. This opens up the…