Controlled Collisions for Multiparticle Entanglement of Optically Trapped Atoms
arXiv:quant-ph/0308080 · doi:10.1038/nature02008
Abstract
Entanglement lies at the heart of quantum mechanics and in recent years has been identified as an essential resource for quantum information processing and computation. Creating highly entangled multi-particle states is therefore one of the most challenging goals of modern experimental quantum mechanics, touching fundamental questions as well as practical applications. Here we report on the experimental realization of controlled collisions between individual neighbouring neutral atoms trapped in the periodic potential of an optical lattice. These controlled interactions act as an array of quantum gates between neighbouring atoms in the lattice and their massively parallel operation allows the creation of highly entangled states in a single operational step, independent of the size of the system. In the experiment, we observe a coherent entangling-disentangling evolution in the many-body system depending on the phase shift acquired during the collision between neighbouring atoms. This dynamics is indicative of highly entangled many-body states that present novel opportunities for theory and experiment.
17 pages, including 5 figures, accepted for publication in Nature
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- Sampling and the complexity of nature
- Two-dimensional imaging of gauge fields in optical lattices
- Directional current-current correlation functions in a two-species hard-core bosons in one dimensional finite lattice: An exact diagonalization study
- Generating scalable entanglement of ultracold bosons in superlattices through resonant shaking
- A total measure of multi-particle quantum correlations in atomic Schrödinger cat states
- Logarithmic growth of peripheral entanglement concentrated via noisy measurements in a star network of spins
- Theoretical Studies on Quantum Walks with a Time-varying Coin
- Protected quantum gates using qubit doublons in dynamical optical lattices
- Single Qudit Control in Sr via Optical Nuclear Electric Resonance
- Fast collisional gate for fermionic atoms in an optical superlattice
- Quantum Computing Using Crossed Atomic Beams
- Multichannel Quantum Defect Theory with Numerical Reference Functions: Applications to Cold Atomic Collisions
- Random-matrix approach to time-dependent forcing in many-body quantum systems
- Measure of tripartite quantum correlation in multiqubit symmetric pure state
- Emergent supercounterfluid and quantum phase diagram of two-component interacting bosons in one-dimensional optical lattice
- Revealing effects of local dimension on variable-range interacting model by connecting Lieb-Robinson bounds and multipartite entanglement
- Dynamics of mode entanglement induced by particle-tunneling in the extended Bose-Hubbard dimer model
- Entanglement creation in cold molecular gases using strong laser pulses