Statistics of states generated by quantum-scissors device

Abstract

Generating desired states is a prerequisite in quantum information. Some desired states can be generated by a quantum-scissors device (QSD). We present a detailed analysis of the properties of the generated states, including average photon numbers and intensity gains. The theoretical analysis shows that there is a nondeterministic amplification in terms of the average photon number under the condition that the average photon number of the input state is less than 1. In contrast to the input states, the generated states show the nonclassical property described by the negativity of the Wigner function. Furthermore, we generalize the QSD to truncate arbitrary photon number terms of the input states, which may be useful in high-dimensional quantum information processing.

Quantum properties of nonclassical states generated by an optomechanical system with catalytic quantum scissors

“…The ba-sic idea of QSD had been extended to generate not only qubits but also qutrits and qudits of any dimension. [21][22][23][24][25][26] Later, the QSD scheme was generalized to a non-deterministic noiseless amplifier [27] and also applied as a teleportation device for superposition states. [28,29] To extend the above-mentioned works, thermal state truncation was proposed via QSD to generate a mixture of vacuum and single-photon states.…”