Doppler cooling
E811517
Doppler cooling is a laser-based technique used to reduce the thermal motion of atoms or ions by exploiting the Doppler effect to selectively slow particles moving toward the light source.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Doppler cooling canonical | 1 |
| optical molasses | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9634863 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Doppler cooling Context triple: [Zeeman slower, basedOn, Doppler cooling]
-
A.
Ioffe–Pritchard trap
The Ioffe–Pritchard trap is a magnetic confinement device that creates a three-dimensional minimum in magnetic field strength to stably trap neutral atoms or antimatter such as antihydrogen.
-
B.
Kapitza–Dirac effect
The Kapitza–Dirac effect is a quantum phenomenon in which a beam of particles, such as electrons or atoms, is diffracted by a standing wave of light, demonstrating the wave-particle duality of matter.
-
C.
Unruh effect
The Unruh effect is a predicted phenomenon in quantum field theory where an accelerating observer perceives what inertial observers consider vacuum as a warm bath of particles with a characteristic temperature.
-
D.
Bose–Einstein condensate
A Bose–Einstein condensate is an exotic state of matter formed when a dilute gas of bosons is cooled to temperatures near absolute zero, causing a large fraction of the particles to occupy the same quantum state and behave as a single quantum entity.
-
E.
Purcell effect
The Purcell effect is a quantum electrodynamics phenomenon in which the spontaneous emission rate of an emitter is enhanced or suppressed by its surrounding electromagnetic environment, such as a resonant cavity.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Doppler cooling Target entity description: Doppler cooling is a laser-based technique used to reduce the thermal motion of atoms or ions by exploiting the Doppler effect to selectively slow particles moving toward the light source.
-
A.
Ioffe–Pritchard trap
The Ioffe–Pritchard trap is a magnetic confinement device that creates a three-dimensional minimum in magnetic field strength to stably trap neutral atoms or antimatter such as antihydrogen.
-
B.
Kapitza–Dirac effect
The Kapitza–Dirac effect is a quantum phenomenon in which a beam of particles, such as electrons or atoms, is diffracted by a standing wave of light, demonstrating the wave-particle duality of matter.
-
C.
Unruh effect
The Unruh effect is a predicted phenomenon in quantum field theory where an accelerating observer perceives what inertial observers consider vacuum as a warm bath of particles with a characteristic temperature.
-
D.
Bose–Einstein condensate
A Bose–Einstein condensate is an exotic state of matter formed when a dilute gas of bosons is cooled to temperatures near absolute zero, causing a large fraction of the particles to occupy the same quantum state and behave as a single quantum entity.
-
E.
Purcell effect
The Purcell effect is a quantum electrodynamics phenomenon in which the spontaneous emission rate of an emitter is enhanced or suppressed by its surrounding electromagnetic environment, such as a resonant cavity.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
atomic physics technique
ⓘ
laser cooling technique ⓘ |
| actsOn |
ions
ⓘ
neutral atoms ⓘ |
| aimsTo |
lower kinetic energy of atoms
ⓘ
lower temperature of atomic ensemble ⓘ reduce thermal motion of particles ⓘ |
| appliesTo |
alkali atoms
ⓘ
alkaline-earth atoms ⓘ trapped ions ⓘ |
| basedOn | Doppler effect ⓘ |
| category |
non-contact cooling method
ⓘ
optical manipulation technique ⓘ |
| DopplerTemperatureDependsOn |
atomic transition frequency
ⓘ
natural linewidth of atomic transition ⓘ |
| DopplerTemperatureProportionalTo | natural linewidth divided by Boltzmann constant ⓘ |
| effect | net momentum transfer opposite to atomic motion ⓘ |
| enables |
Bose–Einstein condensation (as a precooling step)
ⓘ
linked to:
Bose–Einstein condensate
atomic clocks ⓘ laser cooling and trapping of atoms ⓘ magneto-optical traps ⓘ precision spectroscopy ⓘ quantum information experiments with trapped ions ⓘ |
| field | atomic, molecular, and optical physics ⓘ |
| forceType | velocity-dependent radiation pressure force ⓘ |
| hasLimit | Doppler temperature ⓘ |
| historicallyDevelopedIn | 1970s ⓘ |
| limitSetBy | balance of cooling and heating rates ⓘ |
| mechanism |
absorption of red-detuned photons by atoms moving toward laser
ⓘ
spontaneous emission of photons in random directions ⓘ velocity-selective scattering of photons ⓘ |
| opposes | heating from spontaneous emission recoil ⓘ |
| relatedTo |
Sisyphus cooling
ⓘ
sideband cooling ⓘ sub-Doppler cooling ⓘ |
| requires |
closed or nearly closed cycling transition
ⓘ
near-resonant optical transition ⓘ red-detuned laser frequency ⓘ repeated photon scattering ⓘ |
| typicalLaserDetuning | a few natural linewidths below resonance ⓘ |
| typicalLaserIntensity | on the order of saturation intensity ⓘ |
| typicalTemperatureScale | microkelvin range ⓘ |
| usedIn |
laboratory ultra-cold atom experiments
ⓘ
precision metrology ⓘ tests of fundamental physics ⓘ |
| uses | laser light ⓘ |
| usesConfiguration |
counter-propagating laser beams
ⓘ
optical molasses ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Doppler cooling Description of subject: Doppler cooling is a laser-based technique used to reduce the thermal motion of atoms or ions by exploiting the Doppler effect to selectively slow particles moving toward the light source.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Doppler cooling