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Condensed Matter Seminars
Condensed Matter
Tuesday, January 17, 2017
11:00 AM
Physics Building, Room 313
Note special date.

Mohammed Ali Rajabpour
[Host: Israel Klich ]
Fluminense Federal University
"Formation probabilities, Postmeasurement entanglement entropy and Casimir effect "

ABSTRACT:
I will first introduce formation probability as a quantity which can determine the universality class of a quantum critical system. In other words, by calculating this quantity one can find the central charge and critical exponents of the quantum system. We will show that calculating this quantity boils down to finding Casimir energy of two needles. Then we will briefly talk about Shannon mutual information as another quantity which can play similar role. Finally, we will introduce postmeasurement entanglement entropy as a tripartite measure of entanglement. We will show that this quantity is related to the Casimir energy of needles on Riemann surfaces and can be calculated exactly for conformal field theories.
Ref:
1: MAR, Europhysics Letters, 112, 66001 (2015), J. Stat. Mech. (2016) 123101 and K. Najafi, MAR, Phys. Rev. B 93, 125139 (2016).
2: F. C. Alcaraz, MAR, Phys. Rev. Lett. 111, 017201(2013), Phys. Rev. B, 90, 075132 (2014).
3: MAR, Phys. Rev. B 92, 075108 (2015) , J. Stat. Mech. (2016) 063109 and MAR,
K. Najafi, MAR, JHEP12(2016)124.




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