Quantum logical gates with four-level SQUIDs coupled to a superconducting resonator

We propose a way for realizing a two-qubit controlled phase gate with superconducting quantum interference devices (SQUIDs) coupled to a superconducting resonator. In this proposal, the two lowest levels of each SQUID serve as the logical states and two intermediate levels of each SQUID are used for the gate realization. We show that neither adjustment of SQUID level spacings during the gate operation nor uniformity in SQUID parameters is required by this proposal. In addition, this proposal does not require the adiabatic passage or a second-order detuning and thus the gate is much faster.Comment: 6 pages, 3 figure

4-Methyl-1,3-bis­(3,4-methyl­enedioxy­benz­yl)-2-(3,4-methyl­enedioxy­phen­yl)imidazolidine

In the title compound, C27H26N2O6, the imidazolidine ring adopts an envelope conformation. The methyl group on the imidazolidine ring is disordered over two positions with occupancies of 0.517 (11) and 0.483 (11), and the 3,4-methyl­enedioxy­phenyl at the 3-position of imidazolidine ring is also disordered over two positions with occupancies of 0.60 (2) and 0.40 (2)

[N,N′-Bis(4-chloro­benz­yl)ethane-1,2-diamine]dichloridozinc(II)

In the title complex, [ZnCl2(C16H18Cl2N2)], the asymmetric unit contains one mol­ecule and two half-mol­ecules, which have similar geometric parameters; in the latter two molecules each Zn atom lies on a twofold rotation axis. The environment about each ZnII atom is distorted tetra­hedral with coordination of two terminal Cl atoms and two N atoms of the N,N′-bis­(4-chloro­benz­yl)ethane-1,2-diamine ligand. Four N—H⋯Cl hydrogen bonds link the mol­ecules into a chain of R 2 2(8) rings in the [001] direction

4-Methyl-2-oxo-2,3-dihydro-1-benzopyran-7-yl benzene­sulfonate

The title compound, C16H12O5S, is a derivative of coumarin. The dihedral angle between the coumarin ring system and the phenyl ring is 65.9 (1)°. In the crystal structure, mol­ecules are linked by weak C—H⋯O hydrogen bonding to form molecular ribbons

8-Benzoyl-7-hy­droxy-4-methyl-2H-1-benzopyran-2-one monohydrate

In the title compound, C17H12O4·H2O, the coumarin ring system is approximately planar with a maximum atomic deviation of 0.011 (2) Å, and is nearly perpendicular to the phenyl ring at a dihedral angle of 86.63 (9)°. In the crystal, mol­ecules are linked by classical O—H⋯O and weak C—H⋯O hydrogen bonds. π–π stacking is also present [centroid–centroid distance = 3.6898 (12) Å]

8-Acetyl-4-methyl-2-oxo-2H-chromen-7-yl acetate

In the title compound, C14H12O5, the benzopyran-2-one ring system is approximately planar [maximum deviation = 0.018 (1) Å]; the mean plane is oriented at dihedral angles of 52.26 (11) and 72.92 (7)°, respectively, to the acetyl and acet­oxy groups. In the crystal, π–π stacking is observed between parallel benzene rings of adjacent mol­ecules, the centroid–centroid distance being 3.6774 (17) Å. Inter­molecular weak C—H⋯O hydrogen bonding, and C=O⋯C=O [O⋯C = 3.058 (3) Å] and C=O⋯π [O⋯centroid = 3.328 (2) Å] inter­actions occur in the crystal structure

PROPERTIES OF GAS AND CHAR FROM MICROWAVE PYROLYSIS OF PINE SAWDUST

Pine sawdust pyrolysis was carried out respectively using microwave and conventional electrical heating at different temperatures in order to understand the properties of pyrolytic products from microwave pyrolysis of biomass. Less char material was obtained by microwave pyrolysis compared to conventional heating at the same temperature. While comparing the components of the pyrolytic gases, it was revealed that the microwave pyrolysis gas usually had higher H2 and CO contents and lower CH4 and CO2 contents than those obtained by conventional pyrolysis at the same temperature. The texture analysis results of the microwave pyrolysis chars showed that the chars would melt and the pores would shrink at high temperatures, and hence, the specific surface areas of the chars decreased with increasing temperature. Similarly, the reactivity of the char was remarkably reduced when the microwave pyrolysis temperature exceeded 600°C

Bis{2-eth­oxy-6-[2-(methyl­ammonio)ethyl­imino­meth­yl]phenolato}thio­cyanato­zinc(II) nitrate

In the title compound, [Zn(NCS)(C12H18N2O2)2]NO3, the ZnII ion is chelated by the phenolate O and imine N atoms from two zwitterionic Schiff base ligands and is also coordinated by the N atom of a thio­cyanate ligand, giving a distorted trigonal-bipyramidal geometry. Intra­molecular N—H⋯O hydrogen bonds are observed in the complex cation. The nitrate anions are linked to the complex cations through N—H⋯O hydrogen bonds