Related Experiment Video
Updated: May 16, 2026
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Deterministic generation of an on-demand Fock state
Keyu Xia1, Gavin K Brennen, Demosthenes Ellinas
1Centre for Engineered Quantum Systems, Department of Physics and Astronomy, Macquarie University, NSW 2109, Australia. keyu.xia@mq.edu.au
Optics Express
|November 29, 2012
Summary
Researchers demonstrate on-demand generation of photon Fock states using a quantum random walk. This method utilizes a solid-state system with a Nitrogen-Vacancy center and optical cavity for precise control.
Area of Science:
- Quantum Optics
- Solid-State Quantum Systems
- Quantum Information
Background:
- Generating specific quantum states of light, such as photon Fock states, on-demand is crucial for quantum technologies.
- Existing methods often lack precise control or scalability.
Purpose of the Study:
- To theoretically investigate a protocol for deterministic, on-demand generation of photon Fock states.
- To propose a practical implementation of this protocol using a solid-state quantum system.
Main Methods:
- Theoretical study of a quantum random walk protocol incorporating damping.
- Implementation proposal using a Nitrogen-Vacancy (NV) center in a nanodiamond coupled to an optical cavity.
- Control of system parameters via time-dependent Stark shift and stimulated emission depletion (STED).
Main Results:
- The proposed protocol enables deterministic generation of photon Fock states.
- High photon number Fock states can be generated on-demand.
- The system allows for accurate control over the generation process.
Conclusions:
- A viable theoretical framework for on-demand Fock state generation is presented.
- A solid-state implementation using NV-centers offers a scalable and controllable platform.
- This work paves the way for integrated quantum optical devices.
Related Concept Videos
01:22Carrier Generation and Recombination
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...
01:14The Entropy as a State Function
Consider an arbitrary process that moves between two specific states (A and B) in a cyclic manner. This process is reversible and broken down into smaller parts that each follow a Carnot cycle. A Carnot cycle has two isothermal (constant temperature) processes. During these processes, the ratio of the amount of heat transferred to their respective temperature remains constant. The other two processes in the Carnot cycle are also reversible but adiabatic, which means they occur without any heat...
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...
01:24Fast Decoupled and DC Powerflow
The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
00:59Propagation of Uncertainty from Random Error
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...
01:34Woodward–Hoffmann Selection Rules and Microscopic Reversibility
Electrocyclic reactions, cycloadditions, and sigmatropic rearrangements are concerted pericyclic reactions that proceed via a cyclic transition state. These reactions are stereospecific and regioselective. The stereochemistry of the products depends on the symmetry characteristics of the interacting orbitals and the reaction conditions. Accordingly, pericyclic reactions are classified as either symmetry-allowed or symmetry-forbidden. Woodward and Hoffmann presented the selection criteria for...