Internal State Cooling of an Atom with Thermal Light.

Amanda Younes, Randall Putnam, Paul Hamilton, Wesley C Campbell

Abstract read

In one paragraph

Article in Entropy (Basel, Switzerland), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it

0cells of the map it votes in

0citing papers in PubMed

–field-weighted citation impact

1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Amanda YounesDepartment of Physics and Astronomy, University of California Los Angeles, Los Angeles, CA 90095, USA.ORCID 0009-0004-1985-6113

Randall PutnamDepartment of Physics and Astronomy, University of California Los Angeles, Los Angeles, CA 90095, USA.

Paul HamiltonDepartment of Physics and Astronomy, University of California Los Angeles, Los Angeles, CA 90095, USA.

Wesley C CampbellDepartment of Physics and Astronomy, University of California Los Angeles, Los Angeles, CA 90095, USA.

Funding

National Science Foundation OMA-2016245National Science Foundation PHY-2207985

6 · The paper itself

Abstract

A near-minimal instance of optical cooling is experimentally presented, wherein the internal-state entropy of a single atom is reduced more than twofold by illuminating it with broadband, incoherent light. Since the rate of optical pumping by a thermal state increases monotonically with its temperature, the cooling power in this scenario increases with higher thermal occupation, an example of a phenomenon known as cooling by heating. In contrast to optical pumping using coherent, narrow-band laser light, here, we perform the same task with fiber-coupled, broadband sunlight, the brightest laboratory-accessible source of continuous blackbody radiation.

Indexed as

laser coolingquantum thermodynamicsthermal lighttrapped ions

Identifiers

PMID40149146

DOI10.3390/e27030222

PMCPMC11941640

What OpenQuestion holds

Textmetadata

LicenceCC BY

Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.