Transfer of nonclassical features in quantum teleportation via a mixed quantum channel
arXiv:quant-ph/0003078 · doi:10.1103/PhysRevA.62.032305
Abstract
Quantum teleportation of a continuous-variable state is studied for the quantum channel of a two-mode squeezed vacuum influenced by a thermal environment. Each mode of the squeezed vacuum is assumed to undergo the same thermal influence. It is found that when the mixed two-mode squeezed vacuum for the quantum channel is separable, any nonclassical features, which may be imposed in an original unknown state, cannot be transferred to a receiving station. A two-mode Gaussian state, one of which is a mixed two-mode squeezed vacuum, is separable if and only if a positive well-defined function can be assigned to it. The fidelity of teleportation is considered in terms of the noise factor given by the imperfect channel. It is found that quantum teleportation may give more noise than direct transmission of a field under the thermal environment, which is due to the fragile nature of quantum entanglement of the quantum channel.
8 pages
References in corpus (2)
Cited by in corpus (40)
- Quantum information with continuous variables
- Entanglement by a beam splitter: nonclassicality as a prerequisite for entanglement
- Quantum information processing for a coherent superposition state via a mixed entangled coherent channel
- Markovian Master Equations: A Critical Study
- Inseparability inequalities for higher-order moments for bipartite systems
- Quantum versus Classical Domains for Teleportation with Continuous Variables
- Entanglement generation and degradation by passive optical devices
- Continuous-variable teleportation in the characteristic-function description
- Dynamical entanglement-transfer for quantum information networks
- Continuous-variable quantum teleportation through lossy channels
- Optimized teleportation in Gaussian noisy channels
- On the equivalence of the Langevin and auxiliary field quantization methods for absorbing dielectrics
- Experimentally realizable characterizations of continuous variable Gaussian states
- Improving the entanglement transfer from continuous variable systems to localized qubits using non Gaussian states
- Continuous variable teleportation as a generalized thermalizing quantum channel
- Multimode entanglement and telecloning in a noisy environment
- Characterization of bipartite states using a single homodyne detector
- Wigner function and Schroedinger equation in phase space representation
- Continuous-variable teleportation of a negative Wigner function
- Higher order two-mode and multi-mode entanglement in Raman processes
- Tripartite entanglement transfer from flying modes to localized qubits
- Quantum channel of continuous variable teleportation and nonclassicality of quantum states
- Asymmetric quantum channel for quantum teleportation
- Vacuum as a less hostile environment to entanglement
- Entanglement of a two-mode squeezed state in a Gaussian environment
- Role of many-body entanglement in decoherence processes
- Quantum and classical fidelities for Gaussian states
- Entanglement generation in harmonic chains: tagging by squeezing
- Correlated Multiphoton Holes
- Entanglement thresholds for displaying the quantum nature of teleportation
- Teleportation: from probability distributions to quantum states
- Characterization of the entanglement of two squeezed states
- Causality in quantum teleportation: information extraction and noise effects in entanglement distribution
- Noiseless amplification of weak coherent fields exploiting energy fluctuations of the field
- Revisiting maximal average fidelity of teleportation
- Entanglement control of two-level atoms in dissipative cavities
- Local vs Nonlocal cloning in a noisy environment
- Coherent control of levitated nanoparticles via dipole-dipole interaction
- Improving entanglement of even entangled coherent states by a coherent superposition of photon subtraction and addition
- Statistical properties and decoherence of two-mode photon-subtracted squeezed vacuum