Report on scipost_202106_00027v1
E. G. Carnio, A. Buchleitner, F. Schlawin · 2021
We investigate how entanglement can enhance two-photon absorption in a three-level system.First, we employ the Schmidt decomposition to determine the entanglement properties of the optimal two-photon state to drive such a transition, and the maximum enhancement which can be achieved in comparison to the optimal classical pulse.We then adapt the optimization problem to realistic experimental constraints, where photon pairs from a down-conversion source are manipulated by local operations such as spatial light modulators.We derive optimal pulse shaping functions to enhance the absorption efficiency, and compare the maximal enhancement achievable by entanglement to the yield of optimally shaped, separable pulses.3.5 Maximal quantum enhancement 11 4 Realistic pulses 14 4.1 Optimization procedure 14 4.2 Diagonal pulse shaping operators 15 4.3 Example I: shaping down-converted photons 17 4.4 Example II: shaping the pump 18 5 Conclusions 23 A Maximization of (46) 23 References 24