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24 papers · 2 filters
Quantum communication using a bounded-size quantum reference frame
Stephen D. Bartlett, Terry Rudolph, Robert W. Spekkens +1
Typical quantum communication schemes are such that to achieve perfect decoding the receiver must share a reference frame with the sender. Indeed, if the receiver only possesses a…
Momentum exchange between light and a single atom: Abraham or Minkowski?
E. A. Hinds, Stephen M. Barnett
We consider the forces exerted by a pulse of plane-wave light on a single atom. The leading edge of the pulse exerts a dispersive force on the atom, and this modifies the atomic mo…
Feasibility of free space quantum key distribution with coherent polarization states
D. Elser, T. Bartley, B. Heim +3
We demonstrate for the first time the feasibility of free space quantum key distribution with continuous variables under real atmospheric conditions. More specifically, we transmit…
Gauging non-Hermitian Hamiltonians
H. F. Jones
We address the problem of coupling non-Hermitian systems, treated as fundamental rather than effective theories, to the electromagnetic field. In such theories the observables are…
Entanglement Theory and the Second Law of Thermodynamics
Fernando G. S. L. Brandao, Martin B. Plenio
Entanglement is central both to the foundations of quantum theory and, as a novel resource, to quantum information science. The theory of entanglement establishes basic laws, such…
Momentum-space interferometry with trapped ultracold atoms
A. Ruschhaupt, A. del Campo, J. G. Muga
Quantum interferometers are generally set so that phase differences between paths in coordinate space combine constructive or destructively. Indeed, the interfering paths can also…