1. 超流和广义超流的量子多体物理 余 永 乐余 永 乐

2. Motivation: 1 ）清楚明了的超流量子机理和图像 2 ）找出一些新的东西 3 ）定量描述

5. Hamiltonian of the system itself

6. coupling of the system with its environment

7. Hamiltonian of the system itself coupling of the system with its environment The set of eigenstates of forms a complete set to describe all states of the system. causes jumps among these eigenstates, which corresponds the physical processes of the system.

10. With the order of 10^23 atoms Giant Molecules

36. Frictionless

37. Critical temperature

38. Critical velocity

41. Temperature dependence of critical velocity

42. Iordanskii-Langer-Fisher Theory

43. P long time decay of supercurrents

45. Supersolidity

46. Supersolidity in:

47. i) Helium 4;

48. Supersolidity in: i) Helium 4; ii) Neon 4;

49. Supersolidity in: i) Helium 4; ii) Neon 20; iii) Ions in a ring trap.

50. Supersolid in Torsional Oscillator supersolid friction << 100%

51. Supersolid in Torsional Oscillator

52. energy landscape of a glassy system Supersolid in Torsional Oscillator energy dissipation around onset regime

53. Supersolid of ions in a ring trap large supersolid friction close to 100%

54. Thank you ！