The Robustness of a Collectively Encoded Rydberg Qubit

Abstract

We demonstrate a collectively-encoded qubit based on a single Rydberg excitation stored in an ensemble of $N$ entangled atoms. Qubit rotations are performed by applying microwave fields that drive excitations between Rydberg states. Coherent read-out is performed by mapping the excitation into a single photon. Ramsey interferometry is used to probe the coherence of the qubit, and to test the robustness to external perturbations. We show that qubit coherence is preserved even as we lose atoms from the polariton mode, preserving Ramsey fringe visibility. We show that dephasing due to electric field noise scales as the fourth power of field amplitude. These results show that robust quantum information processing can be achieved via collective encoding using Rydberg polaritons, and hence this system could provide an attractive alternative coding strategy for quantum computation and networking.

arXiv commentMain Paper: 6 pages, 4 figures Supplementary Material: 8 pages, 3 figures

References in corpus (41)

• The Quantum Internet
• Quantum information with Rydberg atoms
• Probing many-body dynamics on a 51-atom quantum simulator
• Dipole Blockade and Quantum Information Processing in Mesoscopic Atomic Ensembles
• Dark-State Polaritons in Electromagnetically Induced Transparency
• Many-Body Physics with Individually-Controlled Rydberg Atoms
• Observation of a Many-Body Dynamical Phase Transition with a 53-Qubit Quantum Simulator
• An Optical Lattice Clock with Accuracy and Stability at the $10^{-18}$ Level
• Quantum computing with atomic qubits and Rydberg interactions: Progress and challenges
• Parallel implementation of high-fidelity multi-qubit gates with neutral atoms
• Synthetic three-dimensional atomic structures assembled atom by atom
• Experimental realization of a symmetry protected topological phase of interacting bosons with Rydberg atoms
• Cooperative optical non-linearity due to dipolar interactions in an ultra-cold Rydberg ensemble
• Cooperative atom-light interaction in a blockaded Rydberg ensemble
• ARC: An open-source library for calculating properties of alkali Rydberg atoms
• The Kerr-Cat Qubit: Stabilization, Readout, and Gates
• Quantum error correction of a qubit encoded in grid states of an oscillator
• High-fidelity control and entanglement of Rydberg atom qubits
• Encoding a qubit in a trapped-ion mechanical oscillator
• High-Fidelity Entanglement and Detection of Alkaline-Earth Rydberg Atoms
• Rydberg atom quantum technologies
• Entangling Atomic Spins with a Strong Rydberg-Dressed Interaction
• Storage and control of optical photons using Rydberg polaritons
• Rydberg mediated entanglement in a two-dimensional neutral atom qubit array
• Coherent Excitation Transfer in a Spin Chain of Three Rydberg Atoms
• Nonlinear quantum optics mediated by Rydberg interactions
• Quantum computing with collective ensembles of multi-level systems
• Quantum Simulation of Generic Many-Body Open System Dynamics Using Classical Noise
• A Photon-Photon Quantum Gate Based on Rydberg Interactions
• Long-distance distribution of atom-photon entanglement at telecom wavelength
• All-optical quantum information processing using Rydberg gates
• Fast multi-qubit gates by adiabatic evolution in interacting excited state manifolds
• Scaling the neutral atom Rydberg gate quantum computer by collective encoding in Holmium atoms
• Holographic quantum computing
• Preparation of hundreds of microscopic atomic ensembles in optical tweezer arrays
• Error correction in ensemble registers for quantum repeaters and quantum computers
• Sub-kHz excitation lasers for Quantum Information Processing with Rydberg atoms
• Semi-Deterministic Entanglement between a Single Photon and an Atomic Ensemble
• Multimode storage of quantum microwave fields in electron spins over 100 ms
• Polariton Exchange Interactions in Multichannel Optical Networks
• Photon correlation transients in a weakly blockaded Rydberg ensemble

Cited by in corpus (14)

• Rydberg superatoms: An artificial quantum system for quantum information processing and quantum optics
• Quantum Optics with Rydberg Superatoms
• Suppression of motional dephasing using state mapping
• Proposal of ensemble qubits with two-atom decay
• Rydberg ions in coherent motional states: A new method for determining the polarizability of Rydberg ions
• Long-lived collective Rydberg excitations in atomic gas achieved via ac-Stark lattice modulation
• Preparation of ultra-cold atomic-ensemble arrays using time-multiplexed optical tweezers
• A quantum register using collective excitations in a Bose-Einstein condensate
• Rabi oscillations and entanglement between two atoms interacting by the Rydberg blockade studied by the Jaynes-Cummings Model
• Barium-based Rydberg atom quantum technologies with long Rydberg coherence
• Facilitation Induced Transparency and Single Photon Switch with Dual-Channel Rydberg Interactions
• Coherence enhancement of Rydberg polaritons
• Single photonic qutrit in a collective Rydberg polariton
• Density and pseudo-spin rotons in a bilayer of soft-core bosons