Mircowave induced optical nuclear polarization (MI ONP)

Karl H. Hausser

Jos B.W. Morsink, Wim H. Hesselink, Douwe A. Wiersma

Anonymous, Ayla Rodriguez, Ian Swanson +2 more

Jonathan P. King, Patrick J. Coles, Jeffrey A. Reimer

Armen D. Sargsyan, A. Tonoyan, Rodolphe Momier +2 more

The probabilities of atomic transitions F e − F g = ± 2 between a ground F g and an excited F e level of the D 2 line of any alkali metal atom are zero when no external magnetic field is applied. In an external magnetic field in the range of 0.1–3 kG, the probabilities of these transitions called magnetically induced (MI) are highly modified. For MI transitions, we previously exhibited the following rule: the probabilities of MI transitions with Δ F = + 2 are maximal when using σ + -polarized laser radiation, while the probabilities of MI transitions with Δ F = − 2 are maximal when using σ − -polarized laser radiation. This difference has been termed type 1 MI circular dichroism. It is demonstrated for the first time, to our knowledge, that for alkali atoms with a nuclear spin I = 3 / 2 ( 87 R b , 39 K , 23 N a , 7 L i ) in magnetic fields > 100 G , the probability of the strongest σ + MI transition of the group F g = 1 → F e = 3 ′ (transition | 1 , − 1 ⟩ → | 3 ′ , 0 ′ ⟩ ) is about four times higher than the probabilities of the strongest MI σ − -transitions | 1 , − 1 ⟩ → | 3 ′ , − 2 ′ ⟩ and | 2 , + 1 ⟩ → | 0 ′ , 0 ′ ⟩ . These properties make the σ + MI transition | 1 , − 1 ⟩ → <m

Pei‐Yao Song, F.-Q. Guo, Jin‐Lei Wu +1 more

Abstract Hybrid quantum systems provide versatile physical properties that could be qualified for high‐fidelity quantum information storage, distribution, and processing in a quantum network. This work proposes to synthesize a hybrid generalized Jaynes‐Cummings (JC) model among two mircowave (MW) cavities and a Rydberg atom, where the Rydberg transition occurs by simultaneously absorbing or emitting two MW photons distributed in different cavities. Based on this synthesized Rydberg two‐mode two‐photon JC (TMTP‐JC) model, a hybrid MW‐MW‐atom Toffoli gate is constructed with the atomic qubit encoded on two stable ground states. Furthermore, the Rydberg atom is considered as an interface in an MW‐optical quantum network and a scheme is demonstrated for generating a three‐body photonic entangled state among the two MW cavities and an optical cavity, assisted by the synthesized Rydberg TMTP‐JC interaction. The proposed setup provides a Rydberg‐state–mediated interface for constructing MW‐MW‐atom three‐qubit gates and entangling three‐body MW‐MW‐optical photons, which may bridge the gap for modular, scalable, and cross‐platform quantum networks.