4 papers
Fidelity and quantum phase transitions
Huan-Qiang Zhou, John Paul Barjaktarevic
It is shown that the fidelity, a basic notion of quantum information science, may be used to characterize quantum phase transitions, regardless of what type of internal order is pr…
Teleportation via multi-qubit channels
Jon Links, John Paul Barjaktarevic, Gerard J. Milburn +1
We investigate the problem of teleporting an unknown qubit state to a recipient via a channel of qubits. In this procedure a protocol is employed whereby Bell state measur…
Measurement-Based Teleportation Along Quantum Spin Chains
J. P. Barjaktarevic, J. Links, G. J. Milburn +1
We consider teleportation of an arbitrary spin-1/2 target quantum state along the ground state of a quantum spin chain. We present a decomposition of the Hilbert space of the many…
Fast simulation of a quantum phase transition in an ion-trap realisable unitary map
J. P. Barjaktarevic, G. J. Milburn, Ross H. McKenzie
We demonstrate a method of exploring the quantum critical point of the Ising universality class using unitary maps that have recently been demonstrated in ion trap quantum gates. W…