Quantum teleportation of an elemental silicon nanophotonic CNOT gate
arXiv:2507.16783 · doi:10.1364/OPTICAQ.554577
Abstract
Large-scale quantum computers possess the capacity to effectively tackle practical problems that can be insurmountable for classical computers. The main challenge in building these quantum computers is to realize scalable modules for remote qubits and entanglement. By assembling small, specialized parts into a larger architecture, the modular approach mitigates complexity and uncertainty. Such a distributed architecture requires non-local quantum gate operations between remote qubits. An essential method for implementing such operations, known as quantum gate teleportation, requires only local operations, classical communication, and shared entanglement. Till today, the quantum gate teleportation using a photonic chip has remained elusive. Here we experimentally demonstrate the quantum teleportation of an on-chip controlled-NOT (CNOT) gate, assisted with the scalable silicon chip platform, high-fidelity local quantum logic gates, linear optical components, post-selected entanglement, and coincidence measurements from photonic qubits. First, we measure and characterize our teleported chip-scale CNOT gate with an average truth table fidelity of 93.1 +- 0.3%. Second, for different input polarization states, we obtain an average quantum state fidelity of 87.0 +- 2.2% with our teleported on-chip CNOT gate. Third, we use our non-local CNOT gate for remote entanglement creation of four Bell states, with an average quantum state fidelity of 86.2 +- 0.8%. Fourthly, we fully characterize our teleported on-chip CNOT gate with a quantum process fidelity 83.1 +- 2.0%, and an average non-local CNOT gate fidelity of 86.5 +- 2.2%. Our teleported photonic on-chip quantum logic gate could be extended both to multiple qubits and chip-scale modules towards fault-tolerant and large-scale distributed quantum computation.
20 pages, 4 figures
References in corpus (24)
- Supplementary information for "Quantum supremacy using a programmable superconducting processor"
- Quantum computational advantage using photons
- Integrated Photonic Quantum Technologies
- Logical quantum processor based on reconfigurable atom arrays
- Silica-on-Silicon Waveguide Quantum Circuits
- Quantum circuits with many photons on a programmable nanophotonic chip
- Quantum advantage in learning from experiments
- A Quantum Gate between a Flying Optical Photon and a Single Trapped Atom
- High-speed linear optics quantum computing using active feed-forward
- Qubit teleportation between non-neighboring nodes in a quantum network
- Chip-to-chip quantum teleportation and multi-photon entanglement in silicon
- Demonstration of fault-tolerant universal quantum gate operations
- Long-distance entanglement purification for quantum communication
- A Quantum-Logic Gate between Distant Quantum-Network Modules
- Quantum teleportation on a photonic chip
- Optomechanical quantum teleportation
- Active one-way quantum computation with 2-photon 4-qubit cluster states
- Optical Nondestructive Controlled-NOT Gate without Using Entangled Photons
- Crosstalk Suppression in Individually Addressed Two-Qubit Gates in a Trapped-Ion Quantum Computer
- Nonlocal photonic quantum gates over 7.0 km
- Transverse mode-encoded quantum gate on a silicon photonic chip
- Deterministic and universal quantum squeezing gate in virtue of teleportation-like protocol
- A chip-scale polarization-spatial-momentum quantum SWAP gate in silicon nanophotonics
- Building a controlled-NOT gate between polarization and frequency