Dynamical Decoupling in Optical Fibers: Preserving Polarization Qubits from Birefringent Dephasing

Abstract

One of the major challenges in quantum computation has been to preserve the coherence of a quantum system against dephasing effects of the environment. The information stored in photon polarization, for example, is quickly lost due to such dephasing, and it is crucial to preserve the input states when one tries to transmit quantum information encoded in the photons through a communication channel. We propose a dynamical decoupling sequence to protect photonic qubits from dephasing by integrating wave plates into optical fiber at prescribed locations. We simulate random birefringent noise along realistic lengths of optical fiber and study preservation of polarization qubits through such fibers enhanced with Carr-Purcell-Meiboom-Gill (CPMG) dynamical decoupling. This technique can maintain photonic qubit coherence at high fidelity, making a step towards achieving scalable and useful quantum communication with photonic qubits.

8 pages, 5 figures

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Cited by in corpus (7)

• Robustness of dynamical decoupling sequences
• Error-compensation measurements on polarization qubits
• Preserving photon qubits in an unknown quantum state with Knill Dynamical Decoupling - Towards an all optical quantum memory
• Platonic dynamical decoupling sequences for interacting spin systems
• Single-photon orbital angular momentum qudit states in fiber - Limits to Dephasing correction via dynamical decoupling
• Recovery of Quantum Correlations using Machine Learning
• Dynamical decoupling with tailored waveplates for long distance communication using polarization qubits