2013/03/29 by Hyochul Kim, Ranojoy Bose, Thomas C. Shen +2 · 3 citations
Computer Science · Physics and Astronomy · #Algorithm #Bit (key) #Computer science #Engineering physics #Logic gate #Open quantum system #Optoelectronics #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum computer #Quantum gate #Quantum logic #Quantum mechanics #Quantum network #Quantum optics #Quantum optics and atomic interactions #Quantum sensor #Quantum technology #Solid-state #physics.optics #quant-ph
paper · pdf · doi:10.1038/nphoton.2013.48
published as Nature Photonics (2013)
openalex publication_date 2013/03/29 · arxiv created 2013/04/02 · arxiv updated 2013/04/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Integrated quantum photonics provides a promising route towards scalable solid-state implementations of quantum networks, quantum computers, and ultra-low power opto-electronic devices. 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 development of robust quantum networks, non-destructive quantum measurements, and strong photon-photon interactions. 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 (QD) strongly coupled to a nano-cavity, which acts as a coherently controllable qubit system that conditionally flips the polarization of a photon on picosecond timescales, implementing a controlled-NOT (cNOT) gate. Our results represent an important step towards solid-state quantum networks and provide a versatile approach for probing QD-photon interactions on ultra-fast timescales.