[Phys-seminars] 2017-01-09 Particles and Fields Seminar

guendel guendel at bgu.ac.il
Wed Jan 4 13:45:59 IST 2017


Particles and Fields Seminar

 DATE: 09-01-17

 TIME: 14:00

 PLACE: Physics building (#54) room 207

TITLE: 
Complexity of Formation in Holography

SPEAKER: 
Dr. Shira Chapman, Perimeter Institute, Canada

ABSTRACT/COMMENTS: 
It was recently conjectured that the quantum complexity of a holographic boundary state can be computed by evaluating the gravitational action on a bulk region known as the Wheeler-DeWitt patch. We apply this complexity=action duality to evaluate the `complexity of formation\' (arXiv:1509.07876, arXiv:1512.04993), i.e., the additional complexity arising in preparing the entangled thermofield double state with two copies of the boundary CFT compared to preparing the individual vacuum states of the two copies. We find that for boundary dimensions d>2, the difference in the complexities grows linearly with the thermal entropy at high temperatures. For the special case d=2, the complexity of formation is a fixed constant, independent of the temperature. We compare these results to those found using the complexity=volume duality.


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