{"id":639772,"date":"2025-02-12T16:11:21","date_gmt":"2025-02-12T21:11:21","guid":{"rendered":"https:\/\/www.rochester.edu\/newscenter\/?p=639772"},"modified":"2025-02-12T16:11:46","modified_gmt":"2025-02-12T21:11:46","slug":"nuclear-spin-dark-state-quantum-technologies-639772","status":"publish","type":"post","link":"https:\/\/www.rochester.edu\/newscenter\/nuclear-spin-dark-state-quantum-technologies-639772\/","title":{"rendered":"Scientists directly prove the existence of a nuclear-spin dark state"},"content":{"rendered":"

Confirmation of this elusive state in quantum systems could lead to more efficient quantum devices.<\/strong><\/h2>\n

Quantum computers have the potential to revolutionize technology by solving complex calculations and computations that are difficult, if not impossible, for traditional computers. One major roadblock, however, is instability\u2014quantum states can be easily disrupted by \u201cnoise\u201d from their surrounding environments, causing errors in the systems. Overcoming instability is important in creating effective and reliable quantum computers and other quantum technologies.<\/p>\n

Researchers at the University of Rochester<\/a>\u2014including John Nichol<\/a>, an associate professor in the Department of Physics and Astronomy<\/a>\u2014have taken a key step toward reducing instability in quantum systems, by focusing on an elusive state called a nuclear-spin dark state. Although scientists have long suspected that the nuclear-spin dark state could exist, they haven\u2019t been able to provide direct evidence of it\u2014until now.<\/p>\n

\u201cBy directly confirming the existence of the dark state and its properties, the findings not only validate decades of theoretical predictions but also open the door to developing more advanced quantum systems,\u201d Nichol says.<\/p>\n

The research, published in Nature Physics<\/em><\/a>, focuses on using quantum dots\u2014tiny semiconductor particles that trap single electrons and use their \u201cspin\u201d to store information\u2014to create a nuclear-spin dark state.<\/p>\n

What is nuclear-spin dark state?<\/strong><\/h3>\n

A nuclear-spin dark state is a special quantum state where the nucleus of an atom becomes, in essence, \u201chidden\u201d from the outside world. In a nuclear-spin dark state, the tiny magnetic properties\u2014known as spins\u2014of atomic nuclei line up and synchronize in a way that stops them from disturbing an electron\u2019s spin. This helps to keep the electron spin stable.<\/p>\n

Imagine an electron\u2019s spin is a soloist trying to perform, while the surrounding atomic nuclei are like an orchestra. If the musicians in the orchestra are out of sync, playing at different speeds and volumes, it can throw off the soloist. But if the orchestra members align their timing and play perfectly in sync, their sound can blend into the background, and the soloist\u2019s music will be clear and undisturbed.<\/p>\n

Harnessing dark states for quantum technologies<\/strong><\/h3>\n

Nichol and his colleagues used a technique called dynamic nuclear polarization to align the nuclear spins, creating conditions for the nuclear-spin dark state to form. They directly measured its effects and found that the dark state significantly reduced interactions between the spins of electrons and nuclei.<\/p>\n

The research has many potential applications in quantum sensing and quantum memory technologies.<\/p>\n

\u201cBy reducing the noise, this breakthrough will allow quantum devices to store information longer and perform calculations with great accuracy,\u201d Nichol says.<\/p>\n

Because nuclear-spin dark states are very stable, they could be used in quantum computers and other technologies to store information long-term. They could also be used to make incredibly exact measurements by detecting tiny changes in magnetic fields, temperature, or pressure, improving medical imaging and navigation.<\/p>\n

The fact that the nuclear-spin dark state was discovered in silicon makes the discovery even more exciting for possible future applications, Nichol says: \u201cSilicon is already widely used in today\u2019s technology, which means it may someday be possible to integrate nuclear-spin dark states into future quantum devices.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"

Confirmation of this elusive state in quantum systems could lead to more efficient quantum devices.<\/p>\n","protected":false},"author":912,"featured_media":639842,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[116],"tags":[18662,37092,17762,18572,16072],"class_list":["post-639772","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sci-tech","tag-department-of-physics-and-astronomy","tag-john-nichol","tag-quantum-science","tag-research-finding","tag-school-of-arts-and-sciences"],"acf":[],"yoast_head":"\nScientists directly prove the existence of a nuclear-spin dark state<\/title>\n<meta name=\"description\" content=\"University of Rochester researchers have directly proven the existence of a quantum state known as the nuclear-spin dark state.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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