Alán Aspuru-Guzik

TL;DR: In this paper, the authors apply linear absorption, circular dichroism, and two-dimensional fluorescence spectroscopy to study the polarized collective excitations of excitonically coupled cyanine dimers (Cy3)2 that are rigidly positioned within the opposing sugar-phosphate backbones of the double-stranded region of a doublestranded (ds)-single-standed (ss) DNA fork construct.

TL;DR: In this paper, a correspondence between Walsh functions and a basis for diagonal operators is proposed to construct efficient circuits for diagonal unitaries without ancillas, which reduces the problem of constructing the minimal-depth circuit within a given error tolerance, for an arbitrary diagonal unitary $e^{if(\hat{x})}$ in the $|x>$ basis, to that of finding the minimal length Walsh-series approximation to the function $f(x)$.

TL;DR: This work finds that, compared to the standard discrete Fourier transform approach, for the calculation of vibrational and optical spectra the total propagation time, and hence the computational cost, can be reduced by approximately a factor of five.

TL;DR: In this paper, the authors demonstrate the implementation of a quantum algorithm with high practical significance as well as an important technological advance which brings us closer to a comprehensive control of photonic quantum information.