Effect of the Time Delay between Spin State Preparation and Measurement on Electron Spin Teleportation in a Covalent Donor-Acceptor-Radical System

Laura Bancroft, Yunfan Qiu, Matthew D. Krzyaniak*, Michael R. Wasielewski*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We recently demonstrated photodriven quantum teleportation of an electron spin state in a covalent donor-acceptor-radical (D-A-R•) system. Following specific spin state preparation on R• with a microwave pulse, photoexcitation of A results in two-step electron transfer producing D•+-A-R-, where the spin state on R• is teleported to D•+. This study examines the effects of varying the time (τD) between spin state preparation and photoinitiated teleportation. Using pulse electron paramagnetic resonance spectroscopy, the spin echo of D•+ resulting from teleportation shows a damped oscillation as a function of τD that is simulated using a density matrix model, which provides a fundamental understanding of the echo behavior. Teleportation fidelity calculations also show oscillatory behavior as a function of τD due to the accumulation of a phase factor between ⟨Sx»and ⟨Sy⟩. Understanding experimental parameters intrinsic to quantum teleportation in molecular systems is crucial to leveraging this phenomenon for quantum information applications.

Original languageEnglish (US)
Pages (from-to)156-160
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume13
Issue number1
DOIs
StatePublished - Jan 13 2022

Funding

Experimental work was supported by the National Science Foundation under Award CHE-1900422. Theory and simulations were supported as part of the Center for Molecular Quantum Transduction (CMQT), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, under Award DE-SC0021314. The authors thank Jonathan D. Schultz for his help with MATLAB coding.

ASJC Scopus subject areas

  • General Materials Science
  • Physical and Theoretical Chemistry

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