Menu

Student Seminar: Molecular qubits for quantum information science

by | Feb 10, 2025 | research | 0 comments

Student Seminar
 
Name: Mr. Sanjoy Patra
 
Title: Molecular qubits for quantum information science
      Date & Time: Thursday, 13th February 2025 at 4.00 p.m. 
     Venue: Rajarshi Bhattacharya Memorial  Lecture Hall, Chemical Sciences Building
Abstract:  
 
Fast processing in quantum computation requires well-initialized qubits with long coherence times and controllable readout. In this regard, molecular qubits [1] offer some interesting features related to tunability and control over the state space, making them an emerging new frontier in the broad field of quantum information science. In this talk, I will discuss some limitations of nuclear and electronic spins as qubits using DiVincenzo’s criteria. I will then contrast diamond-based nitrogen vacancy (NV) centers [2] against molecular analogues. I will conclude with a recent study [3] of molecular qubits based on organic radicals that efficiently generate optically excited spin polarization with spin manipulation and optical readout similar to NV centers.
References:
  1. Wasielewski, M.R., Forbes, M.D.E., Frank, N.L. et al. Exploiting chemistry and molecular systems for quantum information science. Nat. Rev. Chem. 4, 490–504 (2020).
  2. Wood, B.D., Stimpson, G.A., March, J.E., Lekhai, Y.N.D., Stephen, C.J., Green, B.L., Frangeskou, A.C., Ginés, L., Mandal, S., Williams, O.A. and Morley, G.W., Long Spin Coherence Times of Nitrogen Vacancy Centers in Milled Nanodiamonds, Phy. Rev. B 2022, 105, 205401.
  3. Gorgon, S., Lv, K., Grüne, J. et al. Reversible spin-optical interface in luminescent organic radicals. Nature 620, 538–544 (2023).