Controlled-phase gate by dynamic coupling of photons to a two-level emitter

We propose an architecture for achieving high-fidelity deterministic quantum logic gates on dual-rail encoded photonic qubits by letting photons interact with a two-level emitter (TLE) inside an optical cavity. The photon wave packets that define the qubit are preserved after the interaction due to...

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Bibliographic Details
Published in:npj quantum information Vol. 8; no. 1; pp. 1 - 9
Main Authors: Krastanov, Stefan, Jacobs, Kurt, Gilbert, Gerald, Englund, Dirk R., Heuck, Mikkel
Format: Journal Article
Language:English
Published: London Nature Publishing Group UK 07.09.2022
Nature Publishing Group
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Subjects:
639/766/483/2802
639/766/483/3925
639/766/483/481
Classical and Quantum Gravitation
Computer engineering
Electromagnetic fields
Information processing
Photons
Physics
Physics and Astronomy
Quantum Computing
Quantum dots
Quantum Field Theories
Quantum Information Technology
Quantum Physics
Relativity Theory
Spintronics
String Theory
ISSN:2056-6387, 2056-6387
Online Access:Get full text
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Summary:We propose an architecture for achieving high-fidelity deterministic quantum logic gates on dual-rail encoded photonic qubits by letting photons interact with a two-level emitter (TLE) inside an optical cavity. The photon wave packets that define the qubit are preserved after the interaction due to a quantum control process that actively loads and unloads the photons from the cavity and dynamically alters their effective coupling to the TLE. The controls rely on nonlinear wave mixing between cavity modes enhanced by strong externally modulated electromagnetic fields or on AC Stark shifts of the TLE transition energy. We numerically investigate the effect of imperfections in terms of loss and dephasing of the TLE as well as control field miscalibration. Our results suggest that III-V quantum dots in GaAs membranes is a promising platform for photonic quantum information processing.
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ISSN:2056-6387
2056-6387
DOI:10.1038/s41534-022-00604-5