{"id":2000117443,"date":"2026-06-29T12:30:03","date_gmt":"2026-06-29T10:30:03","guid":{"rendered":"https:\/\/new.igihe.com\/english\/?p=2000117443"},"modified":"2026-06-29T12:30:05","modified_gmt":"2026-06-29T10:30:05","slug":"physicists-generate-a-new-quantum-state-known-as-a-fractional-fermi-sea","status":"publish","type":"post","link":"https:\/\/new.igihe.com\/english\/physicists-generate-a-new-quantum-state-known-as-a-fractional-fermi-sea\/","title":{"rendered":"Physicists generate a new quantum state known as a fractional Fermi sea"},"content":{"rendered":"\n

The findings, published in Physical Review Letters, reveal how matter can organize itself in unexpected ways that extend beyond established theoretical models.<\/p>\n\n\n\n

The research was conducted by the N\u00e4gerl group in collaboration with theoretical physicist Alvise Bastianello from CNRS and Universit\u00e9 Paris-Dauphine.<\/p>\n\n\n\n

The team focused on understanding how ultracold atomic systems behave when driven far from equilibrium, a condition that often leads to the emergence of novel physical phenomena. <\/p>\n\n\n\n

In the experiment, ultracold cesium atoms were confined within a one-dimensional setup, allowing scientists to precisely control their environment. <\/p>\n\n\n\n

By repeatedly tuning the strength of interactions between the atoms, the researchers were able to push the system into a highly dynamic state, revealing new forms of quantum behavior.<\/p>\n\n\n\n

This controlled manipulation resulted in the formation of what is known as a fractional Fermi sea. <\/p>\n\n\n\n

Unlike conventional quantum states that follow well-established theoretical predictions, this newly observed state displays a more complex and fragmented structure, suggesting that particles can organize in ways not previously anticipated.<\/p>\n\n\n\n

The discovery challenges aspects of the widely used Tomonaga-Luttinger liquid theory, which has long been a cornerstone for understanding one-dimensional quantum systems. <\/p>\n\n\n\n

While the theory successfully explains many known behaviors, the emergence of the fractional Fermi sea indicates that additional phases of matter may exist beyond its scope.<\/p>\n\n\n\n

Researchers believe this breakthrough could have important implications for quantum simulation, a field that uses controlled quantum systems to model complex physical processes. <\/p>\n\n\n\n

Access to new quantum phases may allow scientists to explore phenomena that are otherwise difficult to study in conventional materials.<\/p>\n\n\n\n

Although still in the realm of fundamental research, the findings open new possibilities for advancing quantum physics. <\/p>\n\n\n\n

The ability to engineer and observe such exotic states of matter highlights how much remains to be discovered when quantum systems are pushed beyond their usual limits.<\/p>\n\n\n\n

As research continues, the fractional Fermi sea may become an important reference point in the search for new quantum phases and a deeper understanding of matter at its most fundamental level.<\/p>\n\n\n\n

\"\"
Physicists discover a new quantum phase of matter called a fractional Fermi sea.<\/figcaption><\/figure>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Physicists have successfully created a previously unknown quantum state of matter called a fractional Fermi sea, marking a significant step forward in the study of quantum systems under extreme conditions.<\/p>\n","protected":false},"author":139,"featured_media":2000117447,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"byline":[201],"hashtag":[],"class_list":["post-2000117443","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science-technology","byline-rania-umutoni"],"bylines":[{"id":201,"name":"Rania Umutoni","slug":"rania-umutoni","description":"","image":{"id":0,"url":"https:\/\/secure.gravatar.com\/avatar\/?s=96&d=mm&f=y&r=g","alt":"Default avatar","title":"Default avatar","caption":"","mime_type":"image\/jpeg","sizes":[]},"user_id":139}],"contributors":[{"id":201,"name":"Rania Umutoni","slug":"rania-umutoni","description":"","image":{"id":0,"url":"https:\/\/secure.gravatar.com\/avatar\/?s=96&d=mm&f=y&r=g","alt":"Default avatar","title":"Default avatar","caption":"","mime_type":"image\/jpeg","sizes":[]},"user_id":139}],"featured_image":{"id":2000117447,"url":"https:\/\/cdn.igihe.com\/en\/2026\/06\/ultracold-cesium-atoms-locked-into-hidden-ordered-state.webp","alt":"","caption":"","mime_type":"image\/webp","width":1920,"height":1080,"sizes":{"thumbnail":{"url":"https:\/\/cdn.igihe.com\/en\/2026\/06\/ultracold-cesium-atoms-locked-into-hidden-ordered-state.webp","width":1920,"height":1080},"medium":{"url":"https:\/\/cdn.igihe.com\/en\/2026\/06\/ultracold-cesium-atoms-locked-into-hidden-ordered-state.webp","width":1920,"height":1080},"medium_large":{"url":"https:\/\/cdn.igihe.com\/en\/2026\/06\/ultracold-cesium-atoms-locked-into-hidden-ordered-state.webp","width":1920,"height":1080},"large":{"url":"https:\/\/cdn.igihe.com\/en\/2026\/06\/ultracold-cesium-atoms-locked-into-hidden-ordered-state.webp","width":1920,"height":1080},"full":{"url":"https:\/\/cdn.igihe.com\/en\/2026\/06\/ultracold-cesium-atoms-locked-into-hidden-ordered-state.webp","width":1920,"height":1080}}},"_links":{"self":[{"href":"https:\/\/new.igihe.com\/english\/wp-json\/wp\/v2\/posts\/2000117443","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/new.igihe.com\/english\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/new.igihe.com\/english\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/new.igihe.com\/english\/wp-json\/wp\/v2\/users\/139"}],"replies":[{"embeddable":true,"href":"https:\/\/new.igihe.com\/english\/wp-json\/wp\/v2\/comments?post=2000117443"}],"version-history":[{"count":3,"href":"https:\/\/new.igihe.com\/english\/wp-json\/wp\/v2\/posts\/2000117443\/revisions"}],"predecessor-version":[{"id":2000117477,"href":"https:\/\/new.igihe.com\/english\/wp-json\/wp\/v2\/posts\/2000117443\/revisions\/2000117477"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/new.igihe.com\/english\/wp-json\/wp\/v2\/media\/2000117447"}],"wp:attachment":[{"href":"https:\/\/new.igihe.com\/english\/wp-json\/wp\/v2\/media?parent=2000117443"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/new.igihe.com\/english\/wp-json\/wp\/v2\/categories?post=2000117443"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/new.igihe.com\/english\/wp-json\/wp\/v2\/tags?post=2000117443"},{"taxonomy":"byline","embeddable":true,"href":"https:\/\/new.igihe.com\/english\/wp-json\/wp\/v2\/byline?post=2000117443"},{"taxonomy":"hashtag","embeddable":true,"href":"https:\/\/new.igihe.com\/english\/wp-json\/wp\/v2\/hashtag?post=2000117443"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}