A strange new quantum droplet can hold itself together

Science News from research organizations A strange new quantum droplet can hold itself together Date: August 21, 2026 Source: Monash University Summary: Two very different types of quantum particles may be able to form stable droplets that hold themselves together, challenging decades of conventional thinking. The prediction could soon be tested experimentally and may reveal an unexpectedly rich world of new quantum phases. Share: Facebook Twitter Pinterest LinkedIN Email FULL STORY A schematic of the Bose-Fermi droplet, which demonstrates the unique phase researchers observe in their theory. Credit: Monash University Researchers at Monash University have predicted an unusual new form of quantum matter that could overturn long-held assumptions about how ultracold particles behave. Their calculations suggest that, under the right conditions, two fundamentally different classes of quantum particles -- bosons and fermions -- can combine to create stable, self-bound "quantum droplets." Scientists had previously considered such droplets unlikely to form in strongly interacting Bose-Fermi systems. The findings offer researchers a new theoretical framework for future experiments and could improve scientists' understanding of quantum materials relevant to emerging technologies, including ultra-precise sensors and quantum computing. A Quantum Droplet That Holds Itself Together Lead author and Monash PhD candidate Sam Foster from the School of Physics and Astronomy said the results create opportunities to investigate entirely new quantum states. "Quantum systems can behave in ways that seem impossible in our everyday world. We've shown that these two very different types of particles can balance each other perfectly to create a stable droplet that effectively holds itself together." These quantum droplets are fundamentally different from ordinary drops of liquid. Their stability comes from the unusual laws of quantum mechanics. An attractive force pulling the particles together is precisely counteracted by pressure produced by the fermions, keeping the droplet from collapsing. Foster said the new work also addresses a theoretical problem that researchers have struggled with for years. "Previous theories could only describe these systems when the particles interacted relatively weakly. Our new approach lets us explore what happens when those interactions become much stronger, which is where the most interesting physics emerges." Quantum Droplets Could Be Tested in the Lab Importantly, the calculations indicate that these predicted droplets could be produced using ultracold atom experiments that already exist. That means researchers may have a realistic path toward testing the prediction experimentally.

The team also found signs of additional unusual quantum behavior. Their results point to phenomena resembling the transition between a liquid and a gas, suggesting that these systems may contain a much broader and more complex range of quantum phases than previously recognized. Foster said the implications could eventually reach beyond the field of atomic physics. "Understanding how matter organizes itself under extreme quantum conditions gives us new tools for designing and controlling quantum systems. While this is fundamental research, discoveries like this often become the foundation for tomorrow's quantum technologies." The study was conducted by Sam Foster, Associate Professor Jesper Levinsen and Professor Meera Parish from the Monash School of Physics and Astronomy, together with collaborators at Heidelberg University. The paper, 'Quantum droplets in a resonant Bose-Fermi mixture', is published in Physical Review Letters. RELATED TOPICS Matter & Energy Physics Quantum Physics Graphene Engineering and Construction Materials Science Nanotechnology Nature of Water Chemistry RELATED TERMS Quantum computer Introduction to quantum mechanics Quantum entanglement Particle physics Electron configuration Quantum dot Quantum number Physics Story Source: Materials provided by Monash University. Note: Content may be edited for style and length. Journal Reference: Sam Foster, Olivier Bleu, Jesper Levinsen, Meera M. Parish. Quantum Droplets in a Resonant Bose-Fermi Mixture.

Physical Review Letters, 2026; 137 (7) DOI: 10.1103/5pr6-5fmd Cite This Page: MLA APA Chicago Monash University. "A strange new quantum droplet can hold itself together." ScienceDaily. ScienceDaily, 21 August 2026. . Monash University. (2026, August 21). A strange new quantum droplet can hold itself together. ScienceDaily. Retrieved August 21, 2026 from www.sciencedaily.com/releases/2026/08/260820202846.htm Monash University. "A strange new quantum droplet can hold itself together." ScienceDaily. www.sciencedaily.com/releases/2026/08/260820202846.htm (accessed August 21, 2026). Explore More from ScienceDaily RELATED STORIES Physicists Finally See Strange Magnetic Vortices Predicted 50 Years Ago Mar. 7, 2026 — A team of physicists has experimentally confirmed a long-predicted sequence of exotic magnetic phases in an atomically thin material. When cooled, the material forms tiny magnetic vortices before ... Self-Stimulated Ejection of Freezing Droplets, Unlocking Cost-Effective Applications in De-Icing Jan. 14, 2025 — Water droplets under freezing conditions do not spontaneously detach from surfaces as they do at room temperature due to stronger droplet-surface interaction and lack of an energy transformation ...

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