Dynamical decoupling with tailored waveplates for long distance communication using polarization qubits
arXiv:1302.3823 · doi:10.1103/PhysRevA.88.052311
Abstract
We address the issue of dephasing effects in flying polarization qubits propagating through optical fiber by using the method of dynamical decoupling. The control pulses are implemented with half waveplates suitably placed along the realistic lengths of the single mode optical fiber. The effects of the finite widths of the waveplates on the polarization rotation are modeled using tailored refractive index profiles inside the waveplates. We show that dynamical decoupling is effective in preserving the input qubit state with the fidelity close to one when the polarization qubit is subject to the random birefringent noise in the fiber, as well the rotational imperfections (flip-angle errors) due to the finite width of the waveplates.
8 pages, 5 figures
References in corpus (25)
- The Quantum Internet
- The Magnus expansion and some of its applications
- Optimized Dynamical Decoupling in a Model Quantum Memory
- Fault-Tolerant Quantum Dynamical Decoupling
- How to Enhance Dephasing Time in Superconducting Qubits
- Tackling Systematic Errors in Quantum Logic Gates with Composite Rotations
- Robust dynamical decoupling
- Arbitrarily accurate composite pulses
- Performance of Deterministic Dynamical Decoupling Schemes: Concatenated and Periodic Pulse Sequences
- Long-distance quantum key distribution in optical fiber
- Dynamical decoupling sequence construction as a filter-design problem
- Restoring Coherence Lost to a Slow Interacting Mesoscopic Bath
- Preserving qubit coherence by dynamical decoupling
- Optimal pulse spacing for dynamical decoupling in the presence of a purely-dephasing spin-bath
- Performance comparison of dynamical decoupling sequences for a qubit in a rapidly fluctuating spin-bath
- Concatenated Control Sequences based on Optimized Dynamic Decoupling
- Experimental inhibition of decoherence on flying qubits via bang-bang control
- Optimization of Short Coherent Control Pulses
- Quadratic Dynamical Decoupling: Universality Proof and Error Analysis
- Scalable design of tailored soft pulses for coherent control
- Overcoming Quantum Noise in Optical Fibers
- Concatenated dynamical decoupling with virtual pulses
- Soft-pulse dynamical decoupling in a cavity
- Dynamical Decoupling in Optical Fibers: Preserving Polarization Qubits from Birefringent Dephasing
- Reducing Polarization Mode Dispersion With Controlled Polarization Rotations