Coherent control of a superconducting qubit using light

Quantum science and technology promise the realization of a powerful computational resource that relies on a network of quantum processors connected with low loss and low noise communication channels capable of distributing entangled states [1,2]. While superconducting microwave qubits (3-8 GHz) ope...

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Bibliographic Details
Published in:arXiv.org 2023-10
Main Authors: Warner, Hana K, Holzgrafe, Jeffrey, Yankelevich, Beatriz, Barton, David, Poletto, Stefano, Xin, C J, Sinclair, Neil, Zhu, Di, Sete, Eyob, Langley, Brandon, Batson, Emma, Colangelo, Marco, Shams-Ansari, Amirhassan, Graham, Joe, Berggren, Karl K, Jiang, Liang, Reagor, Matthew, Loncar, Marko
Format: Article
Language:English
Subjects:
Coherence
Entangled states
Low noise
Microprocessors
Nodes
Optical control
Optical fibers
Quantum computing
Quantum entanglement
Quantum phenomena
Qubits (quantum computing)
Room temperature
Superconductivity
Transducers
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Summary:Quantum science and technology promise the realization of a powerful computational resource that relies on a network of quantum processors connected with low loss and low noise communication channels capable of distributing entangled states [1,2]. While superconducting microwave qubits (3-8 GHz) operating in cryogenic environments have emerged as promising candidates for quantum processor nodes due to their strong Josephson nonlinearity and low loss [3], the information between spatially separated processor nodes will likely be carried at room temperature via telecommunication photons (200 THz) propagating in low loss optical fibers. Transduction of quantum information [4-10] between these disparate frequencies is therefore critical to leverage the advantages of each platform by interfacing quantum resources. Here, we demonstrate coherent optical control of a superconducting qubit. We achieve this by developing a microwave-optical quantum transducer that operates with up to 1.18% conversion efficiency (1.16% cooperativity) and demonstrate optically-driven Rabi oscillations (2.27 MHz) in a superconducting qubit without impacting qubit coherence times (800 ns). Finally, we discuss outlooks towards using the transducer to network quantum processor nodes.
ISSN:2331-8422