Coherence of a dynamically decoupled single neutral atom

Abstract

Long qubit coherence and efficient atom-photon coupling are essential for advanced applications in quantum communication. One technique to maintain coherence is dynamical decoupling, where a periodic sequence of refocusing pulses is employed to reduce the interaction of the system with the environment. We experimentally study the implementation of dynamical decoupling on an optically-trapped, spin-polarized ${}^{87}$Rb atom. We use the two magnetic-sensitive $5S_{1/2}$ Zeeman levels, $|F=2,m_F=-2⟩$ and $|F=1,m_F=-1⟩$ as qubit states, motivated by the possibility to couple $|F=2,m_F=-2⟩$ to $5P_{3/2}$ the excited state $|F^{\prime }=3,m_F^{\prime }=-3⟩$ via a closed optical transition. With more refocusing pulses in the dynamical decoupling technique, we manage to extend the coherence time from 38(3)$\mu$s to more than two milliseconds. We also observe a strong correlation between the motional states of the atom and the qubit coherence after the refocusing, which can be used as a measurement basis to resolve trapping parameters.

arXiv comment7 pages, 9 figures

References in corpus (49)

• The Quantum Internet
• NMR Techniques for Quantum Control and Computation
• Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
• Universal dynamical decoupling of a single solid-state spin from a spin bath
• Optical interface created by laser-cooled atoms trapped in the evanescent field surrounding an optical nanofiber
• Keeping a Quantum Bit Alive by Optimized $\pi$-Pulse Sequences
• Optimized Dynamical Decoupling in a Model Quantum Memory
• Fault-Tolerant Quantum Dynamical Decoupling
• Silicon-Vacancy Spin Qubit in Diamond: A Quantum Memory Exceeding 10 ms with Single-Shot State Readout
• A Quantum Gate between a Flying Optical Photon and a Single Trapped Atom
• Deterministic Generation of a Cluster State of Entangled Photons
• Extending Quantum Coherence in Diamond
• Fault-tolerant Quantum Communication with Minimal Physical Requirements
• A photonic cluster state machine gun
• Quantum Nonlinear Optics with a Germanium-Vacancy Color Center in a Nanoscale Diamond Waveguide
• Robust dynamical decoupling for quantum computing and quantum memory
• Quantum Gates and Memory using Microwave Dressed States
• Coherence and Raman sideband cooling of a single atom in an optical tweezer
• Dynamical decoupling sequence construction as a filter-design problem
• Analysis of dephasing mechanisms in a standing wave dipole trap
• Fast Ground State Manipulation of Neutral Atoms in Microscopic Optical Traps
• High fidelity quantum gates via dynamical decoupling
• Coherence properties and quantum state transportation in an optical conveyor belt
• Quantum repeaters with imperfect memories: cost and scalability
• 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
• Optimizing a Dynamical Decoupling Protocol for Solid-State Electronic Spin Ensembles in Diamond
• Ultrasensitive Magnetometer Using a Single Atom
• Fast Quantum State Control of a Single Trapped Neutral Atom
• Echo spectroscopy and quantum stability of trapped atoms
• Decoherence-protected memory for a single-photon qubit
• Free-space lossless state-detection of a single trapped atom
• Optimized Dynamical Decoupling for Power Law Noise Spectra
• Interfacing light and single atoms with a lens
• Robustness of dynamical decoupling sequences
• Continuous dynamical decoupling magnetometry
• Nondestructive Fluorescent State Detection of Single Neutral Atom Qubits
• Coherence preservation of a single neutral atom qubit transferred between magic-intensity optical traps
• Keeping a Single Qubit Alive by Experimental Dynamic Decoupling
• Faithful Solid State Optical Memory with Dynamically Decoupled Spin Wave Storage
• Dynamical decoupling sequences for multi-qubit dephasing suppression and long-time quantum memory
• Noise spectroscopy of a quantum-classical environment with a diamond qubit
• Nonlinear photon-atom coupling with 4Pi microscopy
• Polarization gradient cooling of single atoms in optical dipole traps
• Coherence of a qubit stored in Zeeman levels of a single optically trapped atom
• Suppression of Dephasing of Optically Trapped Atoms
• Measurement and simulation of atomic motion in nanoscale optical trapping potentials
• Revival of Raman Coherence of Trapped Atoms
• Transmission spectroscopy of a single atom in the presence of tensor light shifts

Cited by in corpus (3)

• Observation of the Mollow Triplet from an optically confined single atom
• Measuring the environment of a Cs qubit with dynamical decoupling sequences
• Fano Resonance in Excitation Spectroscopy and Cooling of an Optically Trapped Single Atom