Contributions of gluon recombination to saturation phenomena

Zhu, Wei; Ruan, Jun; Yang, Jingwei; Shen, Zhenqi

doi:10.1103/physrevd.68.094015

Cited by 28 publications

(47 citation statements)

References 32 publications

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“…15,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32 In particular, the promising design being developed at Yale, 15,28,29 using charge qubits coupled to superconducting transmission line resonators, is very similar to the architecture discussed here. Each junction is connected to a metallic plate on the surface of the resonator that covers about one quarter of the surface.…”

Section: Discussionmentioning

confidence: 86%

“…Several investigators have proposed the use of LC resonators, 17,18,19,20,21,22,23,24,25,26 superconducting cavities, 15,27,28,29 or other types of oscillators, 30,31,32 to couple JJs together. We note that although harmonic oscillators are ineffective as computational qubits, because the lowest pair of levels cannot be frequency selected by an external driving force, they are quite desirable as bus qubits or coupling elements.…”

Section: Introductionmentioning

confidence: 99%

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Superconducting qubits coupled to nanoelectromechanical resonators: An architecture for solid-state quantum-information processing

Geller

Cleland

2005

Phys. Rev. A

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We describe the design for a scalable, solid-state quantum-information-processing architecture based on the integration of GHz-frequency nanomechanical resonators with Josephson tunnel junctions, which has the potential for demonstrating a variety of single-and multi-qubit operations critical to quantum computation. The computational qubits are eigenstates of large-area, currentbiased Josephson junctions, manipulated and measured using strobed external circuitry. Two or more of these phase qubits are capacitively coupled to a high-quality-factor piezoelectric nanoelectromechanical disk resonator, which forms the backbone of our architecture, and which enables coherent coupling of the qubits. The integrated system is analogous to one or more few-level atoms (the Josephson junction qubits) in an electromagnetic cavity (the nanomechanical resonator). However, unlike existing approaches using atoms in electromagnetic cavities, here we can individually tune the level spacing of the "atoms" and control their "electromagnetic" interaction strength. We show theoretically that quantum states prepared in a Josephson junction can be passed to the nanomechanical resonator and stored there, and then can be passed back to the original junction or transferred to another with high fidelity. The resonator can also be used to produce maximally entangled Bell states between a pair of Josephson junctions. Many such junction-resonator complexes can assembled in a hub-and-spoke layout, resulting in a large-scale quantum circuit. Our proposed architecture combines desirable features of both solid-state and cavity quantum electrodynamics approaches, and could make quantum information processing possible in a scalable, solid-state environment.

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Section: Discussionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Superconducting qubits coupled to nanoelectromechanical resonators: An architecture for solid-state quantum-information processing

Geller

Cleland

2005

Phys. Rev. A

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“…As an additional benefit, information storage in resonators increases coherence time compared to storage in the qubits. We note that the idea of using resonators to couple qubits has been suggested by many authors [23][24][25][26][27][28][29][30][31][32]. The use of resonators as quantum memories has also been previously proposed [31,[33][34][35].…”

Section: Introductionmentioning

confidence: 79%

Resonator–zero-qubit architecture for superconducting qubits

2012

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We analyze the performance of the Resonator/zero-Qubit (RezQu) architecture in which the qubits are complemented with memory resonators and coupled via a resonator bus. Separating the stored information from the rest of the processing circuit by at least two coupling steps and the zero qubit state results in a significant increase of the ON/OFF ratio and the reduction of the idling error. Assuming no decoherence, we calculate such idling error, as well as the errors for the MOVE operation and tunneling measurement, and show that the RezQu architecture can provide high fidelity performance required for medium-scale quantum information processing.

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“…i.e., the saturation is predicted [5]. The behavior of polarized parton distributions at small x is an important issue because the experimental determination of the first moment of polarized gluon distribution depending on it is rather strongly [1,6].…”

Section: Introductionmentioning

confidence: 99%