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Sequential Generation of Matrix-Product States in Cavity QED
C. Schoen, K. Hammerer, M. M. Wolf +2
We study the sequential generation of entangled photonic and atomic multi-qubit states in the realm of cavity QED. We extend the work of C. Schoen et al. [Phys. Rev. Lett. 95, 1105…
Delocalized Entanglement of Atoms in optical Lattices
K. G. H. Vollbrecht, J. I. Cirac
We show how to detect and quantify entanglement of atoms in optical lattices in terms of correlations functions of the momentum distribution. These distributions can be measured di…
A measurement-based measure of the size of macroscopic quantum superpositions
Jan Ivar Korsbakken, K. Birgitta Whaley, Jonathan DuBois +1
Recent experiments claiming formation of quantum superposition states in near macroscopic sys- tems raise the question of how the sizes of general quantum superposition states in a…
Quantum Description of Nuclear Spin Cooling in a Quantum Dot
H. Christ, J. I. Cirac, G. Giedke
We study theoretically the cooling of an ensemble of nuclear spins coupled to the spin of a localized electron in a quantum dot. We obtain a master equation for the state of the nu…
Matrix Product State Representations
D. Perez-Garcia, F. Verstraete, M. M. Wolf +1
This work gives a detailed investigation of matrix product state (MPS) representations for pure multipartite quantum states. We determine the freedom in representations with and wi…
How much entanglement can be generated between two atoms by detecting photons?
L. Lamata, J. J. Garcia-Ripoll, J. I. Cirac
It is possible to achieve an arbitrary amount of entanglement between two atoms using only spontaneously emitted photons, linear optics, single photon sources and projective measur…