851 citations · 3.1k across the 32 of their papers we have counts for
7 papers · 1 filter
A simple nearest-neighbor two-body Hamiltonian system for which the ground state is a universal resource for quantum computation
Stephen D. Bartlett, Terry Rudolph
We present a simple quantum many-body system - a two-dimensional lattice of qubits with a Hamiltonian composed of nearest-neighbor two-body interactions - such that the ground stat…
Reference frames, superselection rules, and quantum information
Stephen D. Bartlett, Terry Rudolph, Robert W. Spekkens
Recently, there has been much interest in a new kind of ``unspeakable'' quantum information that stands to regular quantum information in the same way that a direction in space or…
Quantum Control of a Single Qubit
Agata M. Branczyk, Paulo E. M. F. Mendonca, Alexei Gilchrist +2
Measurements in quantum mechanics cannot perfectly distinguish all states and necessarily disturb the measured system. We present and analyse a proposal to demonstrate fundamental…
Entanglement and Symmetry: A Case Study in Superselection Rules, Reference Frames, and Beyond
S. J. Jones, H. M. Wiseman, S. D. Bartlett +2
This paper concentrates on a particular example of a constraint imposed by superselection rules (SSRs): that which applies when the parties (Alice and Bob) cannot distinguish among…
Degradation of a quantum directional reference frame as a random walk
Stephen D. Bartlett, Terry Rudolph, Barry C. Sanders +1
We investigate if the degradation of a quantum directional reference frame through repeated use can be modeled as a classical direction undergoing a random walk on a sphere. We dem…
How to observe a coherent superposition of an atom and a molecule
Mark R. Dowling, Stephen D. Bartlett, Terry Rudolph +1
We demonstrate that it is possible, in principle, to perform a Ramsey-type interference experiment to exhibit a coherent superposition of a single atom and a diatomic molecule. Thi…