Naslov
Nanomechanical cat-states generated by dc-voltage driven Cooper pair box qubit

Autori
Radić, Danko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, pp prezentacija, znanstveni

Skup
PCS IBS Seminar

Mjesto i datum
Daejeon, Republika Koreja, 15.12.2020

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Podatak o recenziji nije dostupan

Ključne riječi
NEMS, cat-states, quantum entanglement

Sažetak
Encoding the quantum information into coherent mechanical states is an important goal for quantum communication due to robustness of such macroscopic multi-phonon states with respect to external perturbation. Motivated by this challenge we study the nanoelectromechanical system consisting of Cooper pair box qubit performing nanomechanical vibrations between two bulk superconductors. We demonstrate that a bias voltage applied to superconductors may generate states which are represented by the entanglement of the qubit states with a cat-states (superposition of coherent states) of the nanomechanical oscillator. Tracking the formation and development of such states by calculating the corresponding (negative) Wigner function and entropy of entanglement we propose the experimentally feasible detection of the effect by measuring the average current which attains specific features due to the entanglement.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA