A quantum logic gate between a solid-state quantum bit and a photon

By Hyochul Kim, R. Bose, T. Shen, G. Solomon, Edo Waks. Nature Photonics, 2013

184 citations recorded by the source corpus.

Integrated nanophotonic devices create strong light–matter interactions that are important for the development of solid-state quantum networks1, distributed quantum computers2 and ultralow-power optoelectronics3,4. A key component for many of these applications is the photonic quantum logic gate, where the quantum state of a solid-state quantum bit (qubit) conditionally controls the state of a photonic qubit. These gates are crucial for the development of robust quantum networks5,6,7, non-destructive quantum measurements8,9 and strong photon–photon interactions10. Here, we experimentally realize a quantum logic gate between an optical photon and a solid-state qubit. The qubit is composed of a quantum dot strongly coupled to a nanocavity, which acts as a coherently controllable qubit system that conditionally flips the polarization of a photon on picosecond timescales, implementing a controlled-NOT gate. Our results represent an important step towards solid-state quantum networks and provide a versatile approach for probing quantum dot–photon interactions on ultrafast timescales. Researchers realize a quantum logic gate by performing all-optical coherent control of the exciton states of an InAs quantum dot in a photonic crystal cavity in the strong-coupling regime. Their demonstrations represent an important step towards realizing robust and scalable quantum networks and generating strong photon-photon interactions.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/5d902ce4d6bad3ef803a09ecb93ebe2601c0e234

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

2022 Roadmap on integrated quantum photonics (2021, background): “Single QDs strongly coupled to on-chip cavities furthermore offer a path towards single-photon nonlinearities, which could enable deterministic quantum gates on chip [42].”
Cavity-based quantum networks with single atoms and optical photons (2014, background): “A phase shift in reflection has also been observed with quantum dot-cavity systems (Fushman et al., 2008; Kim et al., 2013).”