3,299 research outputs found
Bis(benzyltrimethylammonium) tetrabromidocuprate(II)
In the title molecular salt, (C10H16N)2[CuBr4], the CuII ion adopts a squashed tetrahedral geometry with Br—Cu—Br angles varying between 99.29 (3) and 132.53 (3)°. In the crystal, the components are linked by C—H⋯Br interactions, thereby generating a three-dimensional network
Storage of multiple single-photon pulses emitted from a quantum dot in a solid-state quantum memory
Quantum repeaters are critical components for distributing entanglement over
long distances in presence of unavoidable optical losses during transmission.
Stimulated by Duan-Lukin-Cirac-Zoller protocol, many improved quantum-repeater
protocols based on quantum memories have been proposed, which commonly focus on
the entanglement-distribution rate. Among these protocols, the elimination of
multi-photons (multi-photon-pairs) and the use of multimode quantum memory are
demonstrated to have the ability to greatly improve the
entanglement-distribution rate. Here, we demonstrate the storage of
deterministic single photons emitted from a quantum dot in a
polarization-maintaining solid-state quantum memory; in addition,
multi-temporal-mode memory with , and narrow single-photon pulses
is also demonstrated. Multi-photons are eliminated, and only one photon at most
is contained in each pulse. Moreover, the solid-state properties of both
sub-systems make this configuration more stable and easier to be scalable. Our
work will be helpful in the construction of efficient quantum repeaters based
on all-solid-state devicesComment: Published version, including supplementary materia
Implementation of many-qubit Grover search with trapped ultracold ions
We propose a potentially practical scheme for realization of an n-qubit (n>2)
conditional phase flip (CPF) gate and implementation of Grover search algorithm
in the ion-trap system. We demonstrate both analytically and numerically that,
our scheme could be achieved efficiently to find a marked state with high
fidelity and high success probability. We also show the merits of the proposal
that the increase of the ion number can improve the fidelity and the success
probability of the CPF gate. The required operations for Grover search are very
close to the capabilities of current ion-trap techniques.Comment: 13 pages, 5 figures, accepted by J. Opt. Soc. Am.
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