Quantum resources for hybrid communication via qubit-oscillator states

@article{Tufarelli2012QuantumRF,
  title={Quantum resources for hybrid communication via qubit-oscillator states},
  author={Tommaso Tufarelli and Davide Girolami and Ruggero Vasile and Sougato Bose and Gerardo Adesso},
  journal={Physical Review A},
  year={2012},
  volume={86},
  pages={052326}
}
We investigate a family of qubit-oscillator states as resources for hybrid quantum communication. They result from a mechanism of qubit-controlled displacement on the oscillator. For large displacements, we obtain analytical formulas for entanglement and other nonclassical correlations, such as entropic and geometric discord, in those states. We design two protocols for quantum communication using the considered resource states: a hybrid teleportation and a hybrid remote-state preparation. The… Expand

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References

SHOWING 1-10 OF 118 REFERENCES
Qubit-controlled displacements in Markovian environments
We study a particular form of interaction Hamiltonian between qubits and quantum harmonic oscillators, whose closed system dynamics results in qubit controlled displacement operations. We show howExpand
Quantum discord and the power of one qubit.
We use quantum discord to characterize the correlations present in the model called deterministic quantum computation with one quantum bit (DQC1), introduced by Knill and Laflamme [Phys. Rev. Lett.Expand
Qubit-mediated time-robust entangling of oscillators in thermal environments
We consider two separated oscillators initially in equilibrium and continuously interacting with thermal environments and propose a way to entangle them using a mediating qubit. An appropriateExpand
Reconstructing the quantum state of oscillator networks with a single qubit
We introduce a scheme to reconstruct arbitrary states of networks composed of quantum oscillators--e.g., the motional state of trapped ions or the radiation state of coupled cavities. The scheme usesExpand
Experimental quantum computing without entanglement.
TLDR
The results show that even fully separable, highly mixed, states can contain intrinsically quantum mechanical correlations and that these could offer a valuable resource for quantum information technologies. Expand
Oscillator state reconstruction via tunable qubit coupling in Markovian environments
We show that a parametrically coupled qubit can be used to fully reconstruct the quantum state of a harmonic oscillator even when both systems are subject to decoherence. By controlling the couplingExpand
Quantum discord for general two-qubit states: Analytical progress
We present a reliable algorithm to evaluate quantum discord for general two-qubit states, amending and extending an approach recently put forward for the subclass of X states. A closed expression forExpand
Interplay between computable measures of entanglement and other quantum correlations
Composite quantum systems can be in generic states characterized not only by entanglement but also by more general quantum correlations. The interplay between these two signatures of nonclassicalityExpand
Measuring geometric quantum discord using one bit of quantum information
We describe an efficient DQC1-algorithm to quantify the amount of Geometric Quantum Discord present in the output state of a DQC1 computation. DQC1 is a model of computation that utilizes separableExpand
Quantum discord for qubit–qudit systems
We present two formulae to calculate quantum discord, a kind of quantum correlation, between a qubit and a second party of arbitrary dimension d. The first formula is the original entropic definitionExpand
...
1
2
3
4
5
...