160 citations · 364 across the 8 of their papers we have counts for
8 papers
Noiseless subsystems and Bell inequalities in curved spacetime
Jonathan L. Ball
We examine the use of noiseless subsystems for quantum information processing between two parties who do not share a common reference frame. In particular we focus on Bell inequali…
Entanglement in an expanding spacetime
J. L. Ball, I. Fuentes-Schuller, F. P. Schuller
We show that a dynamical spacetime generates entanglement between modes of a quantum field. Conversely, the entanglement encodes information concerning the underlying spacetime str…
Decoherence-free subspaces and subsystems for a collectively depolarizing bosonic channel
Jonathan L. Ball, Konrad Banaszek
We discuss the structure of decoherence-free subsystems for a bosonic channel affected by collective depolarization. A single use of the channel is defined as a transmission of a p…
Characterization of the non-classical nature of conditionally prepared single photons
Alfred B. U'Ren, Christine Silberhorn, Jonathan L. Ball +2
A reliable single photon source is a prerequisite for linear optical quantum computation and for secure quantum key distribution. A criterion yielding a conclusive test of the sing…
Quantum Walks with Entangled Coins
S. E. Venegas-Andraca, J. L. Ball, K. Burnett +1
We present a mathematical formalism for the description of unrestricted quantum walks with entangled coins and one walker. The numerical behaviour of such walks is examined when us…
Hybrid noiseless subsystems for quantum communication over optical fibers
Jonathan L. Ball, Konrad Banaszek
We derive the general structure of noiseless subsystems for optical radiation contained in a sequence of pulses undergoing collective depolarization in an optical fiber. This resul…