Alexandra S. Sheremet, Oxana S. Mishina, Elisabeth Giacobino, Dmitriy V. Kupriyanov
231 - 238
We consider the coherent stimulated Raman process developing in an optically dense and disordered atomic medium in application to the quantum memory scheme. Our theoretical model predicts that the hyperfine interaction in the excited state of alkali atoms can positively affect the quantum memory efficiency. Based on the concept of the coherent information transfer we analyze and compare the memory requirements for storage of single photon and macroscopic multi-photon light pulses.
The complexity of quantum channel state determination problem for mono and paired quantum channels is considered. Result is in proportionality of complexity to dimension of space of quantum channel for Eva’s task, and independence for Bob’s task. New physical quantity, inseparability, is proposed as measure of entanglement of states. Application of inseparability to states of paired modes of quantum electromagnetic field shows dependence of entanglement on intensity of biphoton light.
The SOLID concept is to develop small solid-state hybrid systems with 3-8 qubits capable of performing elementary processing and communication of quantum information. This involves design, fabrication and investigation of combinations of qubits, oscillators, cavities, and transmission lines, creating hybrid devices interfacing different types of qubits for quantum data storage, qubit interconversion, and communication. The agenda is to provide proofs of concept, to identify roadblocks, and to stake out roads that seem particularly promising, including practical applications of quantum technologies.