Stefan Krastanov

Universal Control of an Oscillator with Dispersive Coupling to a Qubit

2015 · arXiv (Cornell University)

We investigate quantum control of an oscillator mode off-resonantly coupled to an ancillary qubit. In the strong dispersive regime, we may drive the qubit conditioned on number states of the oscillator, which together with displacement …

Heterogeneous Multipartite Entanglement Purification for Size-Constrained Quantum Devices

2020 · arXiv (Cornell University)

The entanglement resource required for quantum information processing comes in a variety of forms, from Bell states to multipartite GHZ states or cluster states. Purifying these resources after their imperfect generation is an indispensable step …