A06 – Tailor-made beyond-one-excitation quantum states for quantum information and communication
This theory project is concerned with quantum states of light fields and spin systems and their application in quantum information and communication. Light is coupled to or emitted from a system of many spins, while measurements on either the spins or the optical field conditionally prepare non-Gaussian light or spin states, respectively, beyond a single excitation. The focus is on bosonic spin modes where all light-matter interactions, channel evolutions, and measurements occur collectively. As a crucial element we explore active or passive methods for suppressing loss with structured and unstructured atomic systems.
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