Quantum signaling in cavity QED

Jonsson, Robert H., Martin-Martinez, Eduardo and Kempf, Achim (2014) Quantum signaling in cavity QED. Physical Review A - Atomic, Molecular, and Optical Physics, 89 2: . doi:10.1103/PhysRevA.89.022330

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Author Jonsson, Robert H.
Martin-Martinez, Eduardo
Kempf, Achim
Title Quantum signaling in cavity QED
Journal name Physical Review A - Atomic, Molecular, and Optical Physics   Check publisher's open access policy
ISSN 1050-2947
Publication date 2014-02-19
Sub-type Article (original research)
DOI 10.1103/PhysRevA.89.022330
Open Access Status File (Publisher version)
Volume 89
Issue 2
Total pages 14
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Formatted abstract
We consider quantum signaling between two-level quantum systems in a cavity in the perturbative regime of the earliest possible arrival times of the signal. We present two main results: First, we find that, perhaps surprisingly, the analog of amplitude modulated signaling (Alice using her energy eigenstates |g>,|e>, as in the Fermi problem) is generally suboptimal for communication, namely, e.g., phase-modulated signaling (Alice using, e.g., {|+>,|->} states) overcomes the quantum noise already at a lower order in perturbation theory. Second, we study the effect of mode truncations that are commonly used in cavity QED on the modeling of the communication between two-level atoms. We show that, on general grounds, namely for causality to be preserved, the UV cutoff must scale at least polynomially with the desired accuracy of the predictions.
Keyword Quantum signaling
Perturbative regime
Cavity QED
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Centre for Quantum Computer Technology Publications
Official 2015 Collection
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Citation counts: TR Web of Science Citation Count  Cited 22 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 19 times in Scopus Article | Citations
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