Quantum network with single-atoms and cavities: a tool for distributed quantum computing

CIC nanoGUNE Seminars

Speaker

Emanuele Distante, Max Planck Institute of Quantum Optics, Garching, Germany

When

2022/07/28
11:00

Place

nanoGUNE seminar room, Tolosa Hiribidea 76, Donostia - San Sebastian

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**Quantum network with single-atoms and cavities: a tool for distributed quantum computing** Emanuele Distante Max Planck Institute of Quantum Optics, Garching, Germany The development of quantum computers relies on the ability to individually control and mutually couple a large number of qubits. Despite recent progress, scaling up the number of controllable qubits is a major experimental challenge due to residual cross-talks between the qubits, coupling constraints and restricted space. A possible solution could be to connect different quantum computing modules, each containing a limited but controllable number of qubits, on a quantum network which could then be operated as if it was a single quantum machine. In this talk I will discuss a prominent platform to realize such a distributed quantum machine: single neutral atoms trapped at the center of high-finesse optical cavities. The atoms function as stationary qubits which allows for local quantum information processing, while the cavity allows to interface the stationary qubits with single-photons. Photons can then fly into optical fiber connecting multiple cavities and effectively connecting stationary qubits located at different network nodes. Within this context, I will discuss our recent results which demonstrate the use of this platform to transfer quantum information as well as to implement a first rudimental example of distributed quantum computing: a logic gate between distant qubits. **Host:** J. M. Pitarke