6533b829fe1ef96bd128a35e
RESEARCH PRODUCT
Gain tuning for continuous-variable quantum teleportation of discrete-variable states
Akira FurusawaPeter Van LoockTakahiro MizutaMaria FuwaHidehiro YonezawaShuntaro Takedasubject
PhysicsDensity matrixQuantum PhysicsFOS: Physical sciencesQuantum entanglementQuantum PhysicsQuantum energy teleportationTeleportationAtomic and Molecular Physics and OpticsComputer Science::Emerging TechnologiesSuperdense codingQubitQuantum mechanicsQuantum information scienceQuantum Physics (quant-ph)Quantum teleportationdescription
We present a general formalism to describe continuous-variable (CV) quantum teleportation of discrete-variable (DV) states with gain tuning, taking into account experimental imperfections. Here the teleportation output is given by independently transforming each density matrix element of the initial state. This formalism allows us to accurately model various teleportation experiments and to analyze the gain dependence of their respective figures of merit. We apply our formalism to the recent experiment of CV teleportation of qubits [S. Takeda et al., Nature 500, 315 (2013)] and investigate the optimal gain for the transfer fidelity. We also propose and model an experiment for CV teleportation of DV entanglement. It is shown that, provided the experimental losses are within a certain range, DV entanglement can be teleported for any non-zero squeezing by optimally tuning the gain.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-08-17 |