Photogenerated spin-correlated radical pairs (SCRPs) provide new molecular approaches to spin qubit pairs (SQPs) for quantum information science (QIS) applications, such as computing, communications, and sensing. This project will address several goals essential for exploiting SCRPs as SQPs that target QIS applications. We will 1) photogenerate SCRPs to generate well-defined initial SQP quantum states that can will be addressed and manipulated to serve as two-qubit quantum gates; 2) entangle the electron spins of SQPs with one or two nuclear spins to extend spin coherence lifetimes; 3) move (teleport) spin coherences between two sites, focusing on SQP coherence lifetimes and increasing the teleportation distance affect teleportation fidelity; 4) explore how chirality-induced spin selectivity (CISS) influences SQP coherence and polarization using chiral electron donor-acceptor molecules. 5) In topics 1, 2 and 4, we will extend our molecular architectures to include DNA hairpins, which will provide a scalable platform for the rapid synthesis of a wide variety of molecular QIS systems. Time-resolved EPR experiments will be performed using a short laser pulse to generate the SCRP in the presence of a constant microwave field, which we will refer to as TREPR spectroscopy or followed by one or more short microwave pulses that rotate the magnetization of the spin system away from its equilibrium position along the static magnetic field (B0) direction, which we will refer to as pulse-EPR spectroscopy. We will also employ pulse-EPR with optical detection (pulse-ODEPR) to probe the spin states of these systems.
|Effective start/end date||7/1/22 → 6/30/25|
- National Science Foundation (CHE-2154627)
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