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- Institute for Quantum Optics and Quantum Information InnsbruckAT973 papers
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8 papers · 2 filters
De Broglie Wavelength of a Nonlocal Four-Photon
Philip Walther, Jian-Wei Pan, Markus Aspelmeyer +3
Superposition is one of the most distinct features of quantum theory and has been demonstrated in numerous realizations of Young's classical double-slit interference experiment and…
Entanglement swapping of noisy states: A kind of superadditivity in nonclassicality
Aditi Sen De, Ujjwal Sen, Caslav Brukner +2
We address the question as to whether an entangled state that satisfies local realism will give a violation of the same, after entanglement swapping in a suitable scenario. We cons…
Cavity Assisted Nondestructive Laser Cooling of Atomic Qubits
A. Griessner, D. Jaksch, P. Zoller
We analyze two configurations for laser cooling of neutral atoms whose internal states store qubits. The atoms are trapped in an optical lattice which is placed inside a cavity. We…
Interfacing quantum optical and solid state qubits
L. Tian, P. Rabl, R. Blatt +1
We present a generic model of coupling quantum optical and solid state qubits, and the corresponding transfer protocols. The example discussed is a trapped ion coupled to a charge…
Experimental nonlinear sign shift for linear optics quantum computation
Kaoru Sanaka, Thomas Jennewein, Jian-Wei Pan +2
We have realized the nonlinear sign shift (NS) operation for photonic qubits.This operation shifts the phase of two photons reflected by a beam splitter using an extra single photo…
Stability of macroscopic entanglement under decoherence
W. Dür, H. -J. Briegel
We investigate the lifetime of macroscopic entanglement under the influence of decoherence. For GHZ-type superposition states we find that the lifetime decreases with the size of t…