Related Experiment Video
Updated: May 6, 2026
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
14.0K
Nondestructive detection of an optical photon
Andreas Reiserer1, Stephan Ritter, Gerhard Rempe
1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, 85748 Garching, Germany.
Science (New York, N.Y.)
|November 16, 2013
Summary
Researchers developed a new photon detection method that avoids photon destruction, enabling repeated measurements. This breakthrough in quantum optics achieves high detection efficiency and opens doors for quantum computing advancements.
Area of Science:
- Quantum Optics
- Photonics
- Quantum Information Science
Background:
- Conventional optical detectors destroy photons upon detection, preventing repeated measurements.
- Non-destructive photon detection is crucial for advancing quantum technologies like quantum computing.
Purpose of the Study:
- To demonstrate a novel, non-destructive photon detection scheme.
- To enable repeated measurements of single photons and explore their quantum properties.
Main Methods:
- Utilized an optical resonator with a single atom in a superposition state.
- Incoming photons are reflected, toggling the atom's superposition phase.
- Measured the phase shift to detect and trace the photon without absorption.
Main Results:
- Achieved a single-photon detection efficiency of 74%.
- Demonstrated a photon survival probability of 66% after detection.
- Showed potential for increased efficiency through repeated photon observation.
Conclusions:
- The developed scheme offers a robust, non-destructive method for photon detection.
- This advancement is key for developing photonic quantum gates and exotic quantum states of light.
- Paves the way for future quantum communication and computation applications.
Related Concept Videos
01:14Photoluminescence: Applications
1.3K
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
1.3K
01:29Determination of Crystal Structures
138
In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
138
01:02Flame Photometry: Overview
2.1K
Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
2.1K
01:16Spectrophotometry: Introduction
8.5K
Spectrophotometry is the quantitative measurement of the absorption, reflection, diffraction, or transmission of electromagnetic radiation through a material as a function of the intensity and wavelength of the radiation. A spectrophotometer is a device used to measure the change in the radiation intensity caused by its interaction with the material.
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
8.5K
02:26Photoelectric Effect
30.7K
When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
30.7K
01:25Fluorescence and Phosphorescence: Instrumentation
1.9K
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
1.9K