EXPLORING A NEW POST-SELECTION CONDITION FOR EFFICIENT LINEAR OPTICS COMPUTATION

Recently, it has been shown that fundamental gates for theoretically efficient quantum information processing can be realized by using single photon sources, linear optics and photon counters. One of these fundamental gates is the NS-gate, that is, the one-mode non-linear sign shift. In this work, firstly, we prove by an elementary and rigorous proof that the upper bound of success probability of NS-gates with only one helper photon and an undefined number of ancillary modes is bounded by 0.25. Secondly, we explore the upper bound of the success probability of the NS-gate with a new post-selection measurement. The idea behind this new post-selection measurement is to condition the success of NS-gate transformation to the observation of only one helper photon in whichever of the output modes.

Embodying Music: Matching Music and Dance in Memory

We examined the ability to detect a match between a piece of music and a dance intended to express it. We used three pieces of music and three dances, and we presented these under the four following conditions. (1) Sequential selection: participants were presented with a piece of music and then selected, from among three sequentially presented dances, the one that best matched the music; or they were presented with a dance and then selected, from among three sequentially presented musical pieces, the one that best matched the dance. (2) Sequential judgment: participants were presented with a piece of music followed by a dance, or with a dance followed by a piece of music, and decided how well these matched. (3) Simultaneous judgment: participants were presented simultaneously with a piece of music and a dance and decided how well these matched. (4) Isolated presentation: participants were presented with either a dance or a musical piece and answered questions about its characteristics and their responses to it. Participants in the first three conditions answered similar questions about how they made their decision about the match between music and dance. A total of 942 university students participated. In the sequential selection condition, participants successfully matched the music with the dance intended to express it. In the sequential judgment and simultaneous judgment conditions, participants acknowledged matches between congruent music and dance, but also noted matches between music and dance not intended to be congruent. The various means by which participants detected a match between music and dance are examined.

Interfacial wave theory of two-dimensional dendritic growth with anisotropy of surface tension

In this paper, we consider two-dimensional dendritic growth from pure melt with inclusion of the anisotropy of surface tension. The interfacial wave theory previously established for axisymmetric dendritic growth is extended to this case. The results show that the effect of the anisotropy of surface tension on the selection condition of the tip velocity is not significant.