Notes on teleportation in an expanding space

Notes on teleportation in an expanding space

We investigate the quantum teleportation between a conformal detector Alice and an inertial detector Bob in de Sitter space in two schemes, (i) one uses free scalar modes and (ii) one utilizes cavity to store qubit. We show that the fidelity of the teleportation is degraded for Bob in both cases. Wh...

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Veröffentlicht in:Physics letters. B 2013-02, Vol.719 (4-5), p.430-434
Hauptverfasser: Feng, Jun, Yang, Wen-Li, Zhang, Yao-Zhong, Fan, Heng
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Sprache:eng
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Curvature
Detectors
Elementary particles
Holes
Qubits (quantum computing)
Scalars
Stores
Teleportation
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creator Feng, Jun
Yang, Wen-Li
Zhang, Yao-Zhong
Fan, Heng
description We investigate the quantum teleportation between a conformal detector Alice and an inertial detector Bob in de Sitter space in two schemes, (i) one uses free scalar modes and (ii) one utilizes cavity to store qubit. We show that the fidelity of the teleportation is degraded for Bob in both cases. While the fidelity-loss is due to the Gibbons–Hawking effect associated with his cosmological horizon in the scheme (i), the entanglement decreases in the scheme (ii) because the ability to entangle the cavities is reduced by the spacetime curvature. With a cutoff at Planck-scale, comparing with the standard Bunch–Davies choice, we also show that the possible Planckian physics cause extra modifications to the fidelity of the teleportation protocol in both schemes.
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subjects Curvature
Detectors
Elementary particles
Holes
Qubits (quantum computing)
Scalars
Stores
Teleportation
title Notes on teleportation in an expanding space
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