Abstract:

Low-energy excitations of one dimensional (1D) interacting fermions typically split into two independent Tomonaga-Luttinger liquid (TLLs), each of which carries either spin  or charge. This phenomenon is called spin-charge separation--a hallmark of 1D many-body physics. Although there have been more than 40 years of research in this field and evidence for spin-charge separation has been reported in 1D solid state materials, definite experimental observation of this phenomenon is challenging.

In this talk I will report on our recent precise observation of  the TLL theory of spin-charge separation in the trapped 1D ultracold Fermi gas.  This work, for the first time, experimentally verifies the TLL theory of the spin-charge separation and provides strong evidence for nonlinear TLL effects, beyond the TLL model. It is a paradigmatic example of quantum many-body physics, offers new insight into quantum physics. (Science, 376, 1305–1308 (2022)). Moreover, we will  further discuss the spin incoherent TLL, which solely displays  a propagating charge mode but not a spin mode, and its application in quantum metrology.

Bio:

管習(xí)文，中科院精密測(cè)量科學(xué)與技術(shù)創(chuàng)新研究院研究員。 2003-2012年期間在澳大利亞國立大學(xué)物理與工程研究院任研究員、高級(jí)研究員， 現(xiàn)為澳大利亞國立大學(xué)物理與工程研究院榮譽(yù)教授。他擔(dān)任國家科技部重大科學(xué)研究計(jì)劃項(xiàng)目的首席科學(xué)家和國家自然科學(xué)基金重點(diǎn)項(xiàng)目主持人，同時(shí)是美國哈佛大學(xué)、洛斯阿拉莫斯國家實(shí)驗(yàn)室等世界一流研究機(jī)構(gòu)的高級(jí)訪問學(xué)者, 清華大學(xué)高等研究院客座教授，香港中文大學(xué)楊振寧訪問學(xué)人。擔(dān)任《Journal of Physics A》的編委及IUPAP C18數(shù)學(xué)物理委員。

管習(xí)文研究員長期從事冷原子多體系統(tǒng)、自旋系統(tǒng)和凝聚態(tài)物理體系的嚴(yán)格解模型研究，取得了一系列在國際上頗具影響力的研究成果。至今發(fā)表130余篇SCI論文，包括世界物理頂尖期刊Science、Review of Modern Physics、Report on Progress in Physics、Advance in Physics、Nature子刊、National Science Review、Physical Review Letters等。