A Cold Atoms Apparatus for a New Hybrid Quantum System

Abstract

As quantum computing research progresses, the need for a quantum network to allow communication between individual processors is becoming apparent. Such a network will require the ability to process, transmit, and store quantum information. Many quantum devices have been investigated, however individ- ual devices are specialists in one task, and in order to realize a full-scale quan- tum network multiple devices will need to be combined into a hybrid quantum system (HQS). This thesis describes efforts to construct a HQS which will combine laser- cooled atoms with other cryogenically-cooled quantum devices. The envisioned system requires the construction of a new apparatus where 87Rb atoms will be laser cooled, then moved 60 cm into a dilution fridge where they will be coupled to other quantum devices. Once the apparatus is complete, we plan to conduct quantum memory, wavelength transduction, and state transfer ex- periments. This work details the design of the ultra high vacuum chamber where the atoms will be laser cooled, as well as the optical set up required for the cooling. As well, simulations of the transport process are reported, and suggestions for possible transport schemes are given.