Related Experiment Video
Updated: May 28, 2026
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
Unconditionally teleported quantum gates between remote solid-state qubit registers
Mariagrazia Iuliano1, Nicolas Demetriou1, H Benjamin van Ommen1
1QuTech & Kavli Institute of Nanoscience, Delft University of Technology, Delft, the Netherlands.
Nature Communications
|May 26, 2026
Summary
Researchers demonstrate a quantum Controlled-NOT gate between remote diamond qubits. This breakthrough in quantum networks uses nuclear spins for qubits and electron spins for entanglement, paving the way for distributed quantum computing.
Area of Science:
- Quantum Information Science
- Solid-State Quantum Computing
- Quantum Networking
Background:
- Quantum networks are crucial for distributed and modular quantum computation.
- Remote quantum gates are typically achieved through quantum teleportation protocols.
- Key requirements include remote entanglement, local quantum logic, and classical communication.
Purpose of the Study:
- To demonstrate an unconditional Controlled-NOT quantum gate between remote diamond-based qubit devices.
- To showcase the potential of solid-state systems for quantum networking.
Main Methods:
- Utilized Carbon-13 nuclear spins as control and target qubits.
- Employed Nitrogen-Vacancy (NV) electron spins for local logic, readout, and entanglement generation.
- Implemented deterministic logic, single-shot readout, and real-time feed-forward for non-local gates.
Main Results:
- Successfully implemented an unconditional Controlled-NOT quantum gate between remote diamond qubits.
- Created a Greenberger-Horne-Zeilinger state, demonstrating genuine 4-partite entanglement across nodes.
- Achieved non-local gates without the need for post-selection.
Conclusions:
- This work represents a significant advancement for solid-state quantum networks.
- The demonstrated capabilities are essential for exploring distributed quantum computing.
- Enables testing of complex quantum network protocols on full-stack systems.
Related Concept Videos
02:45The Quantum-Mechanical Model of an Atom
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra. Schrödinger...
03:35Hybridization of Atomic Orbitals II
sp3d and sp3d 2 Hybridization
03:24Hybridization of Atomic Orbitals I
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
01:12Fermi Level Dynamics
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
02:43Quantum Numbers
It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
02:18Network Covalent Solids
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...