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Environment-assisted quantum transport
Transport phenomena at the nanoscale are of interest due to the presence of both quantum and classical behavior. In this work, we demonstrate that quantum transport efficiency can be enhanced by a…
Towards quantum chemistry on a quantum computer.
The application of the latest photonic quantum computer technology to calculate properties of the smallest molecular system: the hydrogen molecule in a minimal basis is reported and the complete energy spectrum is calculated to 20 bits of precision.
Discrete single-photon quantum walks with tunable decoherence.
- M. Broome, A. Fedrizzi, B. Lanyon, I. Kassal, Alán Aspuru-Guzik, A. G. White
- PhysicsPhysical review letters
- 26 February 2010
This work presents an intrinsically stable, deterministic implementation of discrete quantum walks with single photons in space, measures walks with up to 6 steps and explores the quantum-to-classical transition by introducing tunable decoherence.
Observation of topologically protected bound states in photonic quantum walks
- T. Kitagawa, M. Broome, Andrew G. White
- PhysicsConference on Lasers and Electro-Optics Europe…
- 22 May 2011
The study of topological phases does not have to remain limited to static or quasi-static/adiabatic situations, and can be extended to periodically driven systems, which have recently been proposed to also exhibit topological behaviors.
Polynomial-time quantum algorithm for the simulation of chemical dynamics
- I. Kassal, S. Jordan, P. Love, M. Mohseni, A. Aspuru‐Guzik
- PhysicsProceedings of the National Academy of Sciences
- 18 January 2008
This paper uses the split-operator approach and explicitly simulates all electron-nuclear and interelectronic interactions in quadratic time, and shows how to efficiently obtain chemically relevant observables, such as state-to-state transition probabilities and thermal reaction rates.
Simulating chemistry using quantum computers.
- I. Kassal, J. Whitfield, A. Perdomo-Ortiz, M. Yung, Alán Aspuru-Guzik
- PhysicsAnnual review of physical chemistry
- 15 July 2010
This review discusses to what extent the ideas in quantum computation, now a well-established field, have been applied to chemical problems and describes algorithms that achieve significant advantages for the electronic-structure problem, the simulation of chemical dynamics, protein folding, and other tasks.
Importance of excitation and trapping conditions in photosynthetic environment-assisted energy transport.
The results call into question the suggested role of ENAQT in the photosynthetic process of green sulfur bacteria and highlight the subtleties associated with drawing lessons for designing biomimetic light-harvesting complexes.
Environment-assisted quantum transport in ordered systems
Noise-assisted transport in quantum systems occurs when quantum time evolution and decoherence conspire to produce a transport efficiency that is higher than what would be seen in either the purely…
Entropy and Disorder Enable Charge Separation in Organic Solar Cells.
It is found that even modest amounts of disorder have a decisive effect, reducing the charge-separation barrier to about kBT or eliminating it altogether, and the charges are usually not thermodynamically bound at all and could separate spontaneously if the kinetics otherwise allowed it.
Observation of topologically protected bound states in a one dimensional photonic system
Takuya Kitagawa1†,1, 2 Matthew A. Broome3†,1, 2 Alessandro Fedrizzi3,1, 2 Mark S. Rudner1,1, 2 Erez Berg1,1, 2 Ivan Kassal2,1, 2 Alán Aspuru-Guzik2,1, 2 Eugene Demler1,1, 2 and Andrew G. White31, 2…