Polarized Particles in a Spin-Transparent Storage Ring as a Quantum Computer

Electrons in spin-transparent storage rings can exhibit a spin-coherencetime of several hours, presenting a compelling platform for quantumcomputing. Spin-polarized electrons are generated by shining circularly-polarized light onto a photocathode, and then injected into the storagering. Then, single-qubit rotations can be implemented by a pulsedsolenoid, and readout of the spin is done using a Mott polarimeter.However, a signifi cant question of the viability of storage rings as aquantum computing platform remains: to date, there is no demonstrationof a two-qubit gate. In this talk, I will explore the possibility of using anentangled train of light pulses impinging on a photocathode to produceelectrons with entangled spins. These spin-entangled electrons couldthen be used as a resource in a measurement-based scheme to performmulti-qubit gates in the storage ring.