Entanglement generation in harmonic chains: tagging by squeezing
arXiv:quant-ph/0506148 · doi:10.1103/PhysRevA.72.052307
Abstract
We address the problem of spring-like coupling between bosons in an open chain configuration where the counter-rotating terms are explicitly included. We show that fruitful insight can be gained by decomposing the time-evolution operator of this problem into a pattern of linear-optics elements. This allows us to provide a clear picture of the effects of the counter-rotating terms in the important problem of long-haul entanglement distribution. The analytic control over the variance matrix of the state of the bosonic register allows us to track the dynamics of the entanglement. This helps in designing a global addressing scheme, complemented by a proper initialization of the register, which quantitatively improves the entanglement between the extremal oscillators in the chain, thus providing a strategy for feasible long distance entanglement distribution.
8 pages, 8 figures, RevTeX4
References in corpus (31)
- Separability Criterion for Density Matrices
- A computable measure of entanglement
- Separability of Mixed States: Necessary and Sufficient Conditions
- Long-distance quantum communication with atomic ensembles and linear optics
- Peres-Horodecki separability criterion for continuous variable systems
- Inseparability criterion for continuous variable systems
- Quantum Teleportation is a Universal Computational Primitive
- Quantum Communication Through an Unmodulated Spin Chain
- Perfect state transfer in quantum spin networks
- Entanglement by a beam splitter: nonclassicality as a prerequisite for entanglement
- Perfect Transfer of Arbitrary States in Quantum Spin Networks
- Optimal local implementation of non-local quantum gates
- The entanglement cost under operations preserving the positivity of partial transpose
- Dynamics and manipulation of entanglement in coupled harmonic systems with many degrees of freedom
- Conclusive and arbitrarily perfect quantum state transfer using parallel spin chain channels
- Partial Teleportation of Entanglement in the Noisy Environment
- Towards mechanical entanglement in nano-electromechanical devices
- Quantum Computing with an 'Always On' Heisenberg Interaction
- High efficiency transfer of quantum information and multi-particle entanglement generation in translation invariant quantum chains
- Unitarily localizable entanglement of Gaussian states
- Complete conditions for entanglement transfer
- Transfer of nonclassical features in quantum teleportation via a mixed quantum channel
- Dynamical entanglement-transfer for quantum information networks
- Quantum cloning in spin networks
- Quantum state transfer in imperfect artificial spin networks
- Nanoelectromechanical Systems
- Quantum Computing in Arrays Coupled by 'Always On' Interactions
- Experimentally realizable characterizations of continuous variable Gaussian states
- Quantum computation in optical lattices via global laser addressing
- Non-Local Quantum Gates: a Cavity-Quantum-Electro-Dynamics implementation
- Qubit state guidance without feedback
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- Entanglement of Solitons in the Frenkel-Kontorova Model
- Dynamic generation of entangling wave packets in XY spin system with decaying long range couplings
- Entanglement creation and distribution on a graph of exchange-coupled qutrits
- Current without bias and diode effect in shuttling transport of nanoshafts
- Creation and localization of entanglement in a simple configuration of coupled harmonic oscillators