טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentBliumkin Alexander
SubjectAcoustic Black Holes in the Bose-Einstein Condensate (BEC)
DepartmentDepartment of Physics
Supervisor Professor Jeff Steinhauer
Full Thesis textFull thesis text - English Version


Abstract


A black hole is a region on the space from which light waves or particles (waves of matter) can not escape. The Surface separates this region from the rest of the space is called “event horizon”. Like to this, astrophysical black hole, a sonic black hole analog should trap sound waves. The set of all points of not return from it have the name “sonic horizon”. The present work discusses the sonic black hole analog in Bose Einstein Condensate (BEC) - quantum gas which has the macroscopic quantum dynamics. The experimental system creates atomic cloud in the BEC state and loads it to the slowly moving magnetic trap. After that the experimental system accelerates the atoms from this magnetic trap to velocities much larger than the local sound velocity. The acceleration is done by an Optical Dipole Trap (ODT) to get very high velocity gradients. This super-sonic flow should trap waves of sound and should create the sonic horizon (the surface of no return for these waves) with a number of specific properties. This work discusses properties of the sonic black holes that have been generated with different parameters and numerical simulation of the experiment. These methods enable to analyze the atomic flow in the experiment and some of properties of the black holes which have been created.