CMSP Seminar @ICTP Stasi Seminar Room Tuesday 19 July at 11.30 - S. SINGHA ROY

[Condensed Matter Section]

Condensed Matter and Statistical Physics Seminar
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Tuesday 19 July at 11.30 a.m.
Luigi Stasi Seminar Room, first floor, Leonardo building

Sudipto SINGHA ROY
Harish Chandra Research Institute, Allahabad, India

'Analytical Recursive Method to Ascertain Multisite Entanglement
in Doped Quantum Spin Ladders'

Abstract:
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We formulate an analytical recursive method to generate the wave function
of doped short-range resonating valence bond (RVB) states as a tool to 
efficiently estimate
multisite entanglement as well as other physical quantities in 
high-temperature superconducting
ladder states, usually described by doping the Mott insulator. We prove 
that doped RVB ladder
states are always genuine multipartite entangled. Importantly, our 
results show that within
specific doping concentration and model parameter regimes, the doped RVB 
state essentially
characterizes the trends of genuine multiparty entanglement in the exact 
ground states of a
Hubbard model with large onsite interactions. More over, the maximum 
genuine multipartite
entanglement in these doped RVB states is observed at relatively large 
doping concentrations
which correspond to the superconducting phase boundary of the Hubbard model.