Related Experiment Video
Updated: Aug 2, 2025
07:56
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
8.5K
Deterministic generation of indistinguishable photons in a cluster state
Dan Cogan1, Zu-En Su1, Oded Kenneth1
1The Physics Department and the Solid State Institute, Technion - Israel Institute of Technology, Haifa, Israel.
Nature Photonics
|April 17, 2023
Summary
Researchers developed a new method to create indistinguishable photons for quantum networks. This breakthrough enables faster, more reliable quantum communication and computing by generating multi-photon cluster states with high fidelity.
Area of Science:
- Quantum Science and Technology
- Quantum Information
- Photonics
Background:
- Controllable generation of entangled particles is vital for quantum technologies.
- Entangled photons are crucial for quantum communication due to their coherence and low interaction.
Purpose of the Study:
- To demonstrate a method for generating multi-indistinguishable photon cluster states.
- To achieve high-rate, deterministic generation of entangled photons for quantum applications.
Main Methods:
- Utilizing periodic excitation of a semiconductor quantum-dot-confined spin.
- Generating a continuous string of photons with optimized entanglement length.
Main Results:
- Demonstrated a multi-indistinguishable photon cluster with deterministic gigahertz generation rates.
- Achieved an optimized entanglement length of approximately ten photons.
- Showcased the potential for scaling cluster dimensionality through photon fusion.
Conclusions:
- The developed method enables the creation of scalable photonic graph states for quantum computing.
- This advancement is key for building advanced all-photonic quantum repeaters.
- Photon indistinguishability is critical for advancing quantum communication and computation.
Related Concept Videos
01:25Deactivation Processes: Jablonski Diagram
775
Luminescence, the emission of light by a substance that has absorbed energy, is a process that involves the interaction of molecules with light. The energy-level diagram, or Jablonski diagram, is a graphical representation of these interactions, illustrating the various states and transitions a molecule can undergo. In a typical Jablonski diagram, the lowest horizontal line represents the ground-state energy of the molecule, which is usually a singlet state. This state represents the energies...
775
01:22Carrier Generation and Recombination
651
Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
651
02:32The de Broglie Wavelength
26.0K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
26.0K
00:59Propagation of Uncertainty from Random Error
751
An experiment often consists of more than a single step. In this case, measurements at each step give rise to uncertainty. Because the measurements occur in successive steps, the uncertainty in one step necessarily contributes to that in the subsequent step. As we perform statistical analysis on these types of experiments, we must learn to account for the propagation of uncertainty from one step to the next. The propagation of uncertainty depends on the type of arithmetic operation performed on...
751
04:08The Uncertainty Principle
23.5K
Werner Heisenberg considered the limits of how accurately one can measure properties of an electron or other microscopic particles. He determined that there is a fundamental limit to how accurately one can measure both a particle’s position and its momentum simultaneously. The more accurate the measurement of the momentum of a particle is known, the less accurate the position at that time is known and vice versa. This is what is now called the Heisenberg uncertainty principle. He...
23.5K
03:06The Pauli Exclusion Principle
41.7K
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:
41.7K