Date:
Thu, 13/09/201812:00-14:00
Location:
Bergmann building, Seminar room
Lecturer: Dima Farfurnik
Abstract:
The unique spin and optical properties of the nitrogen-vacancy (NV) color centers in diamond position them as leading candidates for robust qubits and magnetic nano-sensors. In this talk, I will describe our work on ensembles of NV centers for sensing and the studies of many-body Physics. We enhance the NV concentrations and coherence times by combining electron irradiation with TEM [1], and dynamical decoupling techniques adapted from NMR [2,3], which leads to enhanced magnetic sensing [4]. Furthermore, we show that the application of additional (WAHUHA-based) pulse sequences could determine and decouple dominant interaction sources in the ensemble [5]. Finally, I will present our idea and current experimental status of NV-NV many-body Hamiltonian engineering, which could result in the creation of non-classical states, e.g. spin-squeezed states, which could eventually lead to magnetic sensing beyond the standard quantum limit (SQL)
[1] D. Farfurnik et al., Appl. Phys. Lett. 111, 123101
[2] D. Farfurnik et al., Phys. Rev. B 92, 060301(R)
[3] D. Farfurnik et al., Phys. Rev. A 96, 013850
[4] D. Farfurnik, A. Jarmola, D. Budker and N. Bar-Gill, J. Opt. 20 024008
[5] D. Farfurnik, Y. Horowicz and N. Bar-Gill, arXiv:1709.03370 (submitted)
Abstract:
The unique spin and optical properties of the nitrogen-vacancy (NV) color centers in diamond position them as leading candidates for robust qubits and magnetic nano-sensors. In this talk, I will describe our work on ensembles of NV centers for sensing and the studies of many-body Physics. We enhance the NV concentrations and coherence times by combining electron irradiation with TEM [1], and dynamical decoupling techniques adapted from NMR [2,3], which leads to enhanced magnetic sensing [4]. Furthermore, we show that the application of additional (WAHUHA-based) pulse sequences could determine and decouple dominant interaction sources in the ensemble [5]. Finally, I will present our idea and current experimental status of NV-NV many-body Hamiltonian engineering, which could result in the creation of non-classical states, e.g. spin-squeezed states, which could eventually lead to magnetic sensing beyond the standard quantum limit (SQL)
[1] D. Farfurnik et al., Appl. Phys. Lett. 111, 123101
[2] D. Farfurnik et al., Phys. Rev. B 92, 060301(R)
[3] D. Farfurnik et al., Phys. Rev. A 96, 013850
[4] D. Farfurnik, A. Jarmola, D. Budker and N. Bar-Gill, J. Opt. 20 024008
[5] D. Farfurnik, Y. Horowicz and N. Bar-Gill, arXiv:1709.03370 (submitted)