Scheme for generating the singlet state of three atoms trapped in distant cavities coupled by optical fibers

Iron(III)‐BPsalan Complex Catalyzed Highly Enantioselective Dearomative Chlorination of 2‐Hydroxy‐1‐naphthoates

“…Based on the previous work in iron(III) BPsalan complex catalyzed asymmetric reactions, [1 2–13] we propose two possible reaction intermediates, as depicted in Figure 2. The iron(III) BPsalan complex activates 1 a upon its coordination to the metal ion to give 6‐coordinated intermediates I and II .…”

“…To our delight, the dearomative chlorination reaction proceeded smoothly with product 3 a obtained in 99% yield and 67% ee within 1 hour (Table 1, entry 1). Subsequently the effect of silver salts was investigated (Table 1, entries 2–4), as the addition of silver salts bearing non‐coordinative counteranion may substitute the Cl atom in the iron complex to enhance its activity in halogenation reaction [1 2–13] . Though AgOTf did not notably benefit the reaction (Table 1, entry 2), the addition of AgSbF 6 or AgClO 4 improved the ee of 3 a , albeit with a longer reaction period (Table 1, entries 3 and 4).…”

“…You and coworkers reported an elegant organo‐catalyzed asymmetric chlorinative dearomatization of 2‐hydroxy‐1‐naphthoates 1 with high efficiency and broad substrate scope [7] . Xu and coworkers reported a similar copper catalyzed asymmetric brominative dearomatization of 1 to afford corresponding brominated products in high yields and good to excellent enantioselectivities, and this catalysis could be extended to chlorination albeit with only 80% ee value [8] . Despite these advances, [9] it is still of interest to explore new catalytic systems based on readily available and environment‐benign catalysts for highly enantioselective dearomative chlorination/bromination reactions to meet the increasing demand of sustainable and green catalysis.…”

Feasible superadiabatic-based shortcuts for the fast generation of 3D entanglement between two atoms

“…Thus, the generation of high-dimensional entanglement is of great importance. Up to now, a large number of schemes have been proposed for the generation of high-dimensional entanglement via various techniques [6][7][8][9][10][11][12][13][14][15][16]. Among these techniques, stimulated Raman adiabatic passage (STIRAP) is widely used in the field of time-dependent interaction for many purposes [17,18] because of its robustness against atomic spontaneous emissions and variations in experimental parameters.…”

Singlet-State Preparation for Three Λ-type Atoms with Rydberg Blockade Mechanism *

“…a separated particle simultaneously interacts with two ones initially in the EPR pair. Since then, a series of schemes have successively been proposed [14][15][16][17][18].…”