Abstract: Present disclosure relates to method and apparatus for preparing GKP state using artificial atom in cavity. Method comprises utilizing artificial atom in equal superposition state of two low-energy states and reflecting displaced squeezed vacuum state of light off artificial atom in atom-cavity setup. Method comprises performing unitary operation on two low-energy states of artificial atom to convert them in an equal superposition of two low-energy states and displacing a photonic state by interfering the photonic state with a coherent state of light from a beam splitter. Unitary operation and displacement operation are repeated one or more times. Method comprises measuring the artificial atom to produce the photonic state with a plurality of peaks, interfering two identical photonic states, and performing a homodyne measurement to obtain a proto/intermediate-GKP state.

Abstract: A hemostasis aiding device for use at wound sites associated with venous access procedures.