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34 papers · 2 filters
Phase noise measurement of external cavity diode lasers and implications for optomechanical sideband cooling of GHz mechanical modes
Tobias J. Kippenberg, Albert Schliesser, Michael Gorodetsky
Cavity opto-mechanical cooling via radiation pressure dynamical backaction enables ground state cooling of mechanical oscillators, provided the laser exhibits sufficiently low phas…
Quantum Magnetomechanics with Levitating Superconducting Microspheres
O. Romero-Isart, L. Clemente, C. Navau +2
We show that by magnetically trapping a superconducting microsphere close to a quantum circuit, it is experimentally feasible to perform ground-state cooling and to prepare quantum…
Bose-Einstein condensate as a quantum memory for a photonic polarization qubit
Stefan Riedl, Matthias Lettner, Christoph Vo +3
A scheme based on electromagnetically induced transparency is used to store light in a Bose-Einstein condensate. In this process, a photonic polarization qubit is stored in atomic…
Gapless Hamiltonians for the toric code using the PEPS formalism
Carlos Fernández-González, Norbert Schuch, Michael M. Wolf +2
We study Hamiltonians which have Kitaev's toric code as a ground state, and show how to construct a Hamiltonian which shares the ground space of the toric code, but which has gaple…
Local phase damping of single qubits sets an upper bound on the phase damping rate of entangled states
Stephan Dürr
I derive an inequality in which the phase damping rates of single qubits set an upper bound for the phase damping rate of entangled states of many qubits. The derivation is based o…
Classifying, quantifying, and witnessing qudit-qumode hybrid entanglement
Karsten Kreis, Peter van Loock
Recently, several hybrid approaches to quantum information emerged which utilize both continuous- and discrete-variable methods and resources at the same time. In this work, we inv…