Bose-Einstein condensates exist almost exclusively in specialized physics laboratories, where scientists cool atoms to within billionths of a degree above absolute zero. Outside of these controlled settings, the only other confirmed location is aboard the International Space Station. Theoretically, BEC-like states may also form naturally inside neutron stars, though that remains unproven.
University and Government Labs
The vast majority of Bose-Einstein condensates are created in university research labs and government facilities equipped with highly specialized cooling systems. The first BEC was produced in 1995 at JILA, a joint institute of the National Institute of Standards and Technology (NIST) and the University of Colorado Boulder. Physicists Eric Cornell and Carl Wieman used a vapor of rubidium-87 atoms, confined by magnetic fields and cooled to roughly 170 nanokelvin, about 170 billionths of a degree above absolute zero.
Today, dozens of labs around the world routinely produce BECs. Rice University’s physics department has been working with lithium-7 condensates for decades and was still building new ultracold atom experiments as recently as mid-2024. The University of Virginia, MIT, Stanford, and numerous European institutions also maintain active BEC programs. These labs typically use isotopes of rubidium, sodium, or lithium as their starting material, with rubidium-87 remaining the most common choice because of its favorable collision properties at ultracold temperatures.
How Labs Actually Make One
Creating a BEC requires a two-stage cooling process that brings atoms to temperatures no natural environment on Earth can match. The first stage uses laser cooling: carefully tuned laser beams slow atoms down by hitting them with photons from every direction, draining their kinetic energy. This gets the atoms cold, but not cold enough.
The second stage is evaporative cooling, which works on the same principle as a hot cup of coffee cooling down as steam escapes. The laser-cooled atoms are loaded into a magnetic trap that isolates them from the room-temperature environment. Then, using radio-frequency energy, the most energetic atoms are kicked out of the trap. The remaining atoms redistribute their energy and settle to a lower average temperature. After enough rounds of evaporation, the gas drops below about 200 nanokelvin, and the atoms collectively fall into the same quantum state, forming the condensate. The JILA team famously imaged this transition as their rubidium gas cooled from 200 nanokelvin down to 20 nanokelvin.
The entire apparatus for this process fills a large optical table and requires ultra-high vacuum chambers, precisely aligned laser systems, and powerful magnetic coils. It is not something you would encounter outside a well-funded research facility.
Aboard the International Space Station
The one place outside a ground-based lab where BECs have been confirmed is low Earth orbit. NASA’s Cold Atom Laboratory, built by the Jet Propulsion Laboratory, launched to the International Space Station in March 2018 and was installed that May. It produced the first Bose-Einstein condensates ever created in Earth orbit.
The reason for going to space is gravity. On Earth, once you turn off the magnetic trap holding a BEC, the atoms fall and the condensate disperses in a fraction of a second, limiting how long you can observe it. In the microgravity of the ISS, a released condensate floats in place, giving researchers much longer observation windows. This opens up experiments in fundamental quantum physics that simply aren’t possible on the ground, including more precise measurements of how atoms behave at the boundary between quantum mechanics and gravity.
Inside Solid-State Materials
Not all BECs require gases cooled to nanokelvin temperatures. Physicists have created BEC-like states inside solid materials at room temperature using particles called exciton-polaritons. These are hybrid particles that form when light trapped inside a tiny optical cavity couples strongly with the electrons in a material. In 2014, researchers demonstrated this type of condensation inside a polymer-filled microcavity, observing the hallmark signatures: a sudden nonlinear jump in emission, a shift in the light’s energy, and long-range coherence across the condensate.
These solid-state condensates behave differently from the textbook atomic version. They are “non-equilibrium,” meaning they constantly need to be pumped with energy to persist, unlike an atomic BEC that can sit in a trap for seconds. Still, they exhibit genuine condensation physics and are far easier to set up since they don’t require extreme cooling. This approach is actively being explored for a new class of light-based electronic devices that could take advantage of the flexibility and processability of polymer materials.
Possibly Inside Neutron Stars
The most exotic proposed location for a Bose-Einstein condensate is deep inside a neutron star, the ultra-dense remnant left behind when a massive star collapses. The core of a neutron star packs roughly twice the mass of our sun into a sphere about 20 kilometers across, creating pressures and densities far beyond anything reproducible in a lab.
Under these conditions, theorists have proposed several BEC-like phases. Pairs of neutrons or protons could form condensed states similar to how electrons pair up in superconductors. Exotic particles called mesons might also condense in the inner layers, and if matter is crushed further into its constituent quarks, those quarks could pair and condense as well. In the inner crust of a neutron star, a particularly strange arrangement has been predicted: a fluid of condensed neutrons flowing through a rigid lattice of atomic nuclei, somewhat like a superfluid soaking through a sponge.
None of these astrophysical condensates have been directly observed. The evidence is indirect, drawn from how neutron stars cool over time and how they spin. But the physics strongly suggests that BEC states are a natural consequence of the extreme conditions inside these objects, making neutron stars potentially the largest naturally occurring Bose-Einstein condensates in the universe.
Prototype Quantum Sensors
BECs are beginning to leave pure research settings and appear inside prototype sensing devices. Because all the atoms in a condensate share a single quantum state, they can act as extraordinarily sensitive detectors of tiny forces and fields. Researchers have proposed and built early-stage sensors that use BEC oscillations to detect subtle changes in matter waves traveling through ring-shaped optical circuits. Small fluctuations in the circuit alter the oscillation period of the condensate, which can be measured with high precision using a technique called wavelet analysis.
Practical applications under development include rotation sensors for navigation (keeping aircraft or spacecraft on course without GPS) and gravity sensors that could map underground structures or monitor volcanic activity. These devices are still in the laboratory prototype stage, but they represent the path BECs are taking from exotic physics experiments toward real-world instruments.