Researchers at Nanyang Technological University, Singapore, have presented a complete theoretical scheme of quantum computing with exciton-polariton condensates formed in semiconductor micropillars.
Exciton-polariton condensates have attractive features for quantum computation, e.g., room temperature operation, high dynamical speed, ease of probe, and existing fabrication techniques.
Quantum fluctuations on top of the condensates are shown to realize qubits, which are externally controllable by applied laser pulses.
Quantum tunneling and nonlinear interactions between the condensates allow SWAP, square-root-SWAP and controlled-NOT gate operations between the qubits. (npj Quantum Information)