Unambiguous atomic Bell measurement assisted by multiphoton states

摘要: We propose and theoretically investigate an unambiguous Bell measurement of atomic qubits assisted by multiphoton states. The atoms interact resonantly with the electromagnetic field inside two spatially separated optical cavities in a Ramsey-type interaction sequence. qubit states are postselected measuring photonic resonators. show that if one is able to project onto coherent on opposite sites phase space, can be implemented. Thus, our proposal may provide core element for future components quantum information technology such as repeater based states, matter–field interaction.