Protocol designs for NOON states

The ability to reliably prepare non-classical states will play a major role in the realization of quantum technology. NOON states, belonging to the class of Schrodinger cat states, have emerged as a leading candidate for several applications. Here we show how to generate NOON states in a model of dipolar bosons confined to a closed circuit of four sites. This is achieved by designing protocols to transform initial Fock states to NOON states through use of time evolution, application of an external field, and local projective measurements. The evolution time is independent of total particle number, offering an encouraging prospect for scalability. By variation of the external field strength, we demonstrate how the system can be controlled to encode a phase into a NOON state. We also discuss the physical feasibility, via ultracold dipolar atoms in an optical superlattice setup. Our proposal showcases the benefits of quantum integrable systems in the design of protocols. The ability to realize quantum systems for quantum technology relies on protocols capable of generating robust quantum states. The authors propose two protocols to generate arbitrary NOON states, one is deterministic, the other is probabilistic, and discuss their implementation in ultra-cold atom systems.

Automated summary

The ability to prepare non-classical states reliably is crucial for the realization of quantum technology, and NOON states have emerged as a leading candidate for various applications. This paper demonstrates how to generate NOON states in a model of dipolar bosons and discusses the physical feasibility using ultracold dipolar atoms. The authors propose two protocols, one deterministic and the other probabilistic, for generating arbitrary NOON states in ultra-cold atom systems.