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Monday, July 9, 2018 2:30 pm - 2:30 pm EDT (GMT -04:00)

Quantum metrology gets real

Konrad Banaszek - Centre of New Technologies, University of Warsaw

Quantum physics holds the promise of enhanced performance in metrology and sensing by exploiting non-classical phenomena such as multiparticle interference. Specific designs for quantum-enhanced schemes need to take into account noise and imperfections present in real-life implementations.

Tuesday, July 17, 2018 2:00 pm - 2:00 pm EDT (GMT -04:00)

Ground states of linear rotor chains via the density matrix renormalization group

Dmitri Iouchtchenko

It has been suggested that placing dipolar linear rotors in one-dimensional lattices at zero temperature results in a model that has a transition between ordered and disordered phases. We use the density matrix renormalization group (DMRG) to compute ground states of this model near the critical point to provide further evidence of the phase transition. In particular, we numerically demonstrate divergences in both the entanglement entropy and the correlation length.

Thursday, July 26, 2018 1:00 pm - 1:00 pm EDT (GMT -04:00)

Scott Aaronson, University of Texas at Austin

A Connection Between Gentle Measurement of Quantum States and Differential Privacy

I'll explain a surprising new connection between, on the one hand, gentle measurement (where one wants to measure n unentangled quantum states, in a way that damages the states only by a little), and on the other hand, differential privacy (a field of classical CS where one wants to query a database about n users, in a way that reveals only a little about any individual user).