ELFT HÍRADÓ

[Andras Palyi <palyi AT mail.bme.hu>]

Dear Colleagues,
 
Next Monday, Daniel Varjas (TU Delft) will give an online talk as part of the 
BME Exotic Quantum Phases seminar series:
 
Speaker: Daniel Varjas (TU Delft)
Title: "Hybrid kernel polynomial method"
Time: July 6, Monday, 14:00 (sharp)
 
Abstract: "The kernel polynomial method allows to sample overall spectral 
properties of a quantum system, while sparse diagonalization provides 
accurate information about a few important states. We present a method 
combining these two approaches without loss of performance or accuracy. We 
apply this hybrid kernel polynomial method to improve the computation of 
thermodynamic quantities and the construction of perturbative effective 
models, in a regime where neither of the methods is sufficient on its own. To 
achieve this we develop a perturbative kernel polynomial method to compute 
arbitrary order series expansions of expectation values. We demonstrate the 
efficiency of our approach on three examples: the calculation of supercurrent 
and inductance in a Josephson junction, the interaction of spin qubits 
defined in a two dimensional electron gas, and the calculation of the 
effective band structure in a realistic model of a semiconductor nanowire. 
Reference: https://arxiv.org/abs/1909.09649 
<https://arxiv.org/abs/1909.09649>"
 
Link to join the talk in Teams:
https://teams.microsoft.com/l/meetup-join/19%3a5608e2f299c34915b1834c5cdd233bfe%40thread.tacv2/1593682381723?context=%7b%22Tid%22%3a%226a3548ab-7570-4271-91a8-58da00697029%22%2c%22Oid%22%3a%22f8b27e90-dbca-4bb5-813c-d6415577ec35%22%7d
 
<https://teams.microsoft.com/l/meetup-join/19%3a5608e2f299c34915b1834c5cdd233bfe%40thread.tacv2/1593682381723?context=%7b%22Tid%22%3a%226a3548ab-7570-4271-91a8-58da00697029%22%2c%22Oid%22%3a%22f8b27e90-dbca-4bb5-813c-d6415577ec35%22%7d>

Best regards,
Andras Palyi