Distributed quantum computing with photons and atomic memories

Abstract

The promise of universal quantum computing requires scalable single- and inter-qubit control interactions. Currently, three of the leading candidate platforms for quantum computing are based on superconducting circuits, trapped ions, and neutral atom arrays. However, these systems have strong interaction with environmental and control noises that introduce decoherence of qubit states and gate operations. Alternatively, photons are well decoupled from the environment, and have advantages of speed and timing for distributed quantum computing. Photonic systems have already demonstrated capability for solving specific intractable problems like Boson sampling, but face challenges for practically scalable universal quantum computing solutions because it is extremely difficult for a single photon to "talk" to another deterministically. Here, we propose a universal distributed quantum computing scheme based on photons and atomic-ensemble-based quantum memories. Taking the established photonic advantages, we mediate two-qubit nonlinear interaction by converting photonic qubits into quantum memory states and employing Rydberg blockade for controlled gate operation. We further demonstrate spatial and temporal scalability of this scheme. Our results show photon-atom network hybrid approach can be an alternative solution to universal quantum computing.

arXiv comment6 pages, 5 figures

References in corpus (33)

• Decoherence, einselection, and the quantum origins of the classical
• Review article: Linear optical quantum computing
• Quantum information with Rydberg atoms
• Quantum computational advantage using photons
• Dipole Blockade and Quantum Information Processing in Mesoscopic Atomic Ensembles
• Decoherence, the measurement problem, and interpretations of quantum mechanics
• Trapped-Ion Quantum Computing: Progress and Challenges
• Observation of three-photon Greenberger-Horne-Zeilinger entanglement
• Observation of Rydberg blockade between two atoms
• Demonstration of a neutral atom controlled-NOT quantum gate
• Observation of collective excitation of two individual atoms in the Rydberg blockade regime
• Quantum computing with atomic qubits and Rydberg interactions: Progress and challenges
• Realization of a multi-node quantum network of remote solid-state qubits
• Building logical qubits in a superconducting quantum computing system
• Towards high-speed optical quantum memories
• Storage and control of optical photons using Rydberg polaritons
• High-rate, high-fidelity entanglement of qubits across an elementary quantum network
• Blueprint for a Scalable Photonic Fault-Tolerant Quantum Computer
• Efficient quantum memory for single photon polarization qubits
• Single-photon-level quantum memory at room temperature
• Observation of coherent many-body Rabi oscillations
• Highly efficient optical quantum memory with long coherence time in cold atoms
• A solid state spin-wave quantum memory for time-bin qubits
• A Photon-Photon Quantum Gate Based on Rydberg Interactions
• All-optical quantum information processing using Rydberg gates
• Coherence and Rydberg blockade of atomic ensemble qubits
• Hybrid entanglement of three quantum memories with three photons
• Optimal Storage and Retrieval of Single-Photon Waveforms
• Preparation of hundreds of microscopic atomic ensembles in optical tweezer arrays
• Fast Preparation and Detection of a Rydberg Qubit using Atomic Ensembles
• Photon-photon gate via the interaction between two collective Rydberg excitations
• Towards efficient quantum memory of orbital angular momentum qubits in cold atoms
• An on-chip optical lattice for cold atom experiments

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• RELiQ: Scalable Entanglement Routing via Reinforcement Learning in Quantum Networks