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- Centre National de la Recherche ScientifiqueFR640 papers
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13 papers · 2 filters
Multi-bit gates for quantum computing
Xiaoguang Wang, Anders Sorensen, Klaus Molmer
We present a general technique to implement products of many qubit operators communicating via a joint harmonic oscillator degree of freedom in a quantum computer. By conditional d…
su(2) and su(1,1) displaced number states and their nonclassical properties
Hongchen Fu, Xiaoguang Wang, Chong Li +1
We study su(2) and su(1,1) displaced number states. Those states are eigenstates of density-dependent interaction systems of quantized radiation field with classical current. Those…
Entanglement and Extreme Spin Squeezing
Anders Sorensen, Klaus Molmer
For any mean value of a cartesian component of a spin vector we identify the smallest possible uncertainty in any of the orthogonal components. The corresponding states are optimal…
Squeezing and entanglement of atomic beams
L. -M. Duan, A. Sørensen, J. I. Cirac +1
We propose and analyze a scheme for generating entangled atomic beams out of a Bose-Einstein condensate using spin-exchanging collisions. In particular, we show how to create both…
On Arbitrary Phases in Quantum Amplitude Amplification
Peter Hoyer
We consider the use of arbitrary phases in quantum amplitude amplification which is a generalization of quantum searching. We prove that the phase condition in amplitude amplificat…
Many-particle entanglement with Bose--Einstein condensates
Anders Sorensen, Lu-Ming Duan, Ignacio Cirac +1
We propose a method to produce entangled states of several particles starting from a Bose-Einstein condensate. In the proposal, a single fast pulse is applied to the atoms an…