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SUMMARY:Nuclear shape evolution and quantum phase transitions in the shell
 -model framework: Toward a unified description
DTSTART;VALUE=DATE-TIME:20260409T040000Z
DTEND;VALUE=DATE-TIME:20260409T053000Z
DTSTAMP;VALUE=DATE-TIME:20260426T000700Z
UID:indico-event-4893@indico-tdli.sjtu.edu.cn
DESCRIPTION:Speakers: Guanjian Fu（傅冠健） (Tongji University)\n\nAb
 stract:Elliott’s SU(3) model is at the basis of the nuclear shell-model 
 description of rotational motion in atomic nuclei. While the shell model d
 oes provide a general framework for reproducing rotational bands and shape
  coexistence in light- and medium-mass nuclei\, it faces significant compu
 tational challenges when describing deformed nuclei in heavier mass region
 s. As a result\, the hunt for efficient truncation schemes is a key challe
 nge in nuclear structure theory. To address this\, nucleon-pair correlatio
 n has been introduced as an effective strategy for truncating the configur
 ation space within the shell model. In this talk\, I will introduce a rec
 ently developed method: the angular-momentum-projected particle-number-con
 served BCS theory. This approach involves the intrinsic nucleon-pair conde
 nsate\, where "intrinsic" condensates are constructed within the shell mod
 el space and subsequently projected onto states with good angular momentum
 . It bridges the shell model and deformed mean-field models. I will also p
 resent our recent work on shell-model effective interactions in the heavy-
 mass region\, particularly near neutron number N = 82\, along with finding
 s from state-of-the-art large-scale shell-model calculations. These develo
 pments offer a comprehensive understanding of pairing\, shape coexistence\
 , shape evolution\, and quantum phase transitions in atomic nuclei.Biograp
 hy:GuanJian Fu is an Associate Professor and PhD advisor at Tongji Univers
 ity. He received his PhD in 2015 from Shanghai Jiao Tong University\, afte
 r which he joined Tongji University as an Assistant Professor. He became a
 n Associate Professor in 2019 and was promoted to a tenured Associate Prof
 essor in 2023. His research primarily focuses on theoretical nuclear physi
 cs\, particularly in shell model\, pairing theory\, and nuclear mass predi
 ctions. His academic contributions include the development of the nucleon-
 pair approximation with isospin symmetry and the angular-momentum-projecte
 d particle-number-conserved BCS theory. He proposed the coexistence of iso
 vector and isoscalar pairing in atomic nuclei\, and his work has addressed
  long-standing controversies in the microscopic foundation of pairing theo
 ries\, particularly in the Elliott’s SU(3) limit in deformed nuclei and 
 has quantitatively highlighted the importance of high-angular-momentum nuc
 leon pairs. Furthermore\, he has proposed high-precision nuclear mass form
 ulas. Dr. Fu’s research has been recognized with several awards\, includ
 ing the National Outstanding Young Scientist Fund and the "Hu Jimin Award"
  from the Chinese Nuclear Physics Society.Host: Prof. Yu-Min ZhaoAlternati
 ve online link：https://meeting.tencent.com/dm/Tuyg2o97n1znID:924550277 
   Password: 123456\n\nhttps://indico-tdli.sjtu.edu.cn/event/4893/
LOCATION:5#/6th-603 - Meeting Room 603 (Science Building)
URL:https://indico-tdli.sjtu.edu.cn/event/4893/
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