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Physics - Disturbing the Fermi Sea with Rydberg States


Disturbing the Fermi Sea with Rydberg States
May 17, 2021•
Physics 14, 74
A method that enables long-range interactions between fermions on a lattice allows atomic quantum simulations of exotic quantum many-body phenomena.
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Li atoms (red) are prevented by Pauli exclusion from occupying the same ground state, they each occupy a different low-energy state, forming a Fermi sea (green). Exciting the atoms to Rydberg states (inset) allows them to interact, driving fluctuations in the Fermi sea and generating exotic quantum phenomena.When fermionic
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Li atoms (red) are prevented by Pauli exclusion from occupying the same ground state, they each occupy a different low-energy state, forming a Fermi sea (green). Exciting the atoms to Rydberg states (inset) allows them to interact, dr. Show more ....

Rydberg States , Fermi Sea , Xiaopeng Li , Quantum Institute , Elmer Guardado Sanchez At Princeton University , University Of Maryland , Physics Department Of Fudan University , Fudan University , University Of Pittsburgh , Department Of Physics , Shanghai Qi Zhi Institute , Alan Stonebraker , Princeton University , Physics Department , Shanghai Qi Zhi , Joint Quantum Institute , குவாண்டம் நிறுவனம் , பல்கலைக்கழகம் ஆஃப் மேரிலாந்து , பல்கலைக்கழகம் ஆஃப் பிட்ஸ்பர்க் , துறை ஆஃப் இயற்பியல் , ஷாங்காய் குய் ழி நிறுவனம் , ஆலன் ஸ்தோந்ெபிரகேற் , ப்ரிந்ஸ்டந் பல்கலைக்கழகம் , இயற்பியல் துறை , கூட்டு குவாண்டம் நிறுவனம் ,

Engineering single-molecule fluorescence with asymmetric nano-antennas


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IMAGE: (a) Schematic of double-bar nano-antenna coated with AIEE1000 molecules (black double ended arrows) in PMMA (light blue) on glass substrate (light grey). Inset shows the chemical structure of AIEE1000. (b-g).
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Credit: by Wenqi Zhao, Xiaochaoran Tian, Zhening Fang, Shiyi Xiao, Meng Qiu, Qiong He, Wei Feng, Fuyou Li, Yuanbo Zhang, Lei Zhou, and Yan-Wen Tan
Single-molecule fluorescence detection (SMFD) is able to probe, one molecule at a time, dynamical processes that are crucial for understanding functional mechanisms in biosystems. Fluorescence in the Near-infrared (NIR) offers improved Signal to Noise Ratio (SNR) by reducing the scattering, absorption and autofluorescence from biological cellular or tissue samples, therefore, provides high imaging resolution with increased tissue penetration depth that are important for biomedical applications. However, most NIR-emitters suffer from low quantum yield, the weak NIR fluorescence sig ....

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Efficient generations of complex vectorial optical fields with metasurfaces

Efficient generations of complex vectorial optical fields with metasurfaces
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