Related Experiment Video
Updated: Mar 20, 2026
12:19
Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
Published on: April 4, 2017
8.9K
Quantum Router for Single Photons Carrying Spin and Orbital Angular Momentum
Yuanyuan Chen1, Dong Jiang1, Ling Xie1
1State Key Laboratory for Novel Software Technology, Nanjing University, Nanjing, 210046, P.R. China.
Scientific Reports
|June 4, 2016
Summary
We developed a quantum router using quantum dots and interaction-free measurement. This device routes photonic qubits based on electronic control, supporting spin and orbital angular momentum, enabling quantum network construction.
Area of Science:
- Quantum Information Science
- Quantum Optics
- Nanotechnology
Background:
- Quantum networks require efficient routing of quantum information.
- Existing quantum routing methods face challenges in scalability and versatility.
Purpose of the Study:
- To present a novel, fully quantum router.
- To demonstrate routing capabilities for single photons with different angular momenta.
- To explore the construction of multi-level quantum routers.
Main Methods:
- Utilizing interaction-free measurement and quantum dots.
- Implementing an interferometric scheme for photon routing.
- Employing a tunable controlled-phase gate for analysis.
Main Results:
- Successfully routed single photonic qubits based on a control electronic qubit.
- Demonstrated routing for photons carrying spin angular momentum (SAM), orbital angular momentum (OAM), or both.
- Proposed a cascaded design for a one-to-many quantum router.
Conclusions:
- The proposed quantum router is feasible and versatile.
- The scheme supports various photonic qubit types.
- This work contributes to the development of advanced quantum networks.
Related Concept Videos
02:43Quantum Numbers
53.8K
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.
53.8K
02:45The Quantum-Mechanical Model of an Atom
61.3K
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.
61.3K
01:03Atomic Nuclei: Nuclear Spin State Overview
2.2K
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
2.2K
03:06The Pauli Exclusion Principle
60.7K
The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
60.7K
01:08Atomic Nuclei: Nuclear Spin
5.6K
All atomic particles possess an intrinsic angular momentum, or 'spin'. Electrons, protons, and neutrons each have a spin value of ½, although protons and neutrons in nuclei may have higher half-integer spins owing to energetic factors.
Atomic nuclei have a net nuclear spin, , which can have an integer or half-integer value. In atomic nuclei, the spins of protons are paired against each other but not with neutrons, and vice versa. Consequently, an even number of protons does not contribute to...
Atomic nuclei have a net nuclear spin, , which can have an integer or half-integer value. In atomic nuclei, the spins of protons are paired against each other but not with neutrons, and vice versa. Consequently, an even number of protons does not contribute to...
5.6K
01:10Angular Momentum: Single Particle
8.0K
Angular momentum is directed perpendicular to the plane of the rotation, and its magnitude depends on the choice of the origin. The perpendicular vector joining the linear momentum vector of an object to the origin is called the “lever arm.” If the lever arm and linear momentum are collinear, then the magnitude of the angular momentum is zero. Therefore, in this case, the object rotates about the origin such that it lies on the rim of the circumference defined by the lever arm...
8.0K