NASA's Cold Atom Laboratory aboard the ISS produced Bose-Einstein condensates of rubidium atoms reaching effective temperatures around 100 nanokelvin (one ten-millionth of a degree above absolute zero) starting in 2018, with subsequent microgravity experiments extending free-expansion observation times far beyond what's possible in Earth-bound labs due to the absence of gravitational sag.
The question, scope, and sources behind this Registry record.
NASA's Cold Atom Laboratory aboard the ISS produced Bose-Einstein condensates of rubidium atoms reaching effective temperatures around 100 nanokelvin (one ten-millionth of a degree above absolute zero) starting in 2018, with subsequent microgravity experiments extending free-expansion observation times far beyond what's possible in Earth-bound labs due to the absence of gravitational sag.
The lowest effective temperature achieved for a Bose-Einstein condensate produced aboard NASA's Cold Atom Laboratory facility on the International Space Station, exploiting microgravity's removal of gravitational sag on the trapped atom cloud.
Change a parameter to stress-test whether a proposed result is still inside the published specification. This is an audit aid, not a proof checker.
This record has no editable parameters. Read the formal question and assumptions before challenging it.
Current frontiers derived from accepted Claims.
An observed or demonstrated result; no opposing bound is implied.
The frontier is not sacred
Most progress starts with a disagreement that survives contact with evidence. If you can push the known lower bound up or pull the upper bound down, show us the work.
≥ when you have shown that at least this value is achievable.≤ when you have shown that anything above this value is impossible.No vibes. State the value, define the scope, and link the paper, proof, code, or reproduction that lets another person check it. Editors review every challenge before the public record changes.
Challenge this recordAssertions tied to evidence, attribution, and review.
The frontier as it changed over time.
Only accepted Claims matching the current specification contribute to the displayed bounds. Strict inequalities remain open; contradictory Claims require editorial review.
No community challenges are recorded for this published version yet.
1 accepted Claim, with 1 linked evidence records.
Permanent ID limitsregistry.com/limits/LR-COLDEST-BOSE-EINSTEIN-CONDENSATE-MICROGRAVITY
No active verified bounties are linked to this Limit.
View verified bounty tracker ↗No accepted machine-checked reproductions are recorded for this Limit.
Limits Registry. LR-COLDEST-BOSE-EINSTEIN-CONDENSATE-MICROGRAVITY. Coldest Bose-Einstein condensate created in microgravity. 2026.