Scalable quantum computing using persistent current qubits with Josephson junctions

Kim, Mun Dae; Shin, Dongkwan; Jiao, Hong

doi:10.1016/s1386-9477(02)00951-7

Physica E: Low-dimensional Systems and Nanostructures

2003

DOI: 10.1016/s1386-9477(02)00951-7

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Scalable quantum computing using persistent current qubits with Josephson junctions

Mun Dae Kim

Dongkwan Shin

Hong Jiao

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2009

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Cited by 2 publications

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“…As one kind of the solid-state systems, the superconducting qubits placed in a superconducting cavity own the relatively long decoherence time and can be considered as a good candidate. Hitherto many works for actualizing quantum computation have been advanced [16][17][18][19][20][21][22] with SQUID qubits.…”

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confidence: 99%

Robust Conditional z Gate Operation in the Decoherence-Free Subspace of Superconducting Quantum-Interference Devices

et al. 2009

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A scheme for implementing a conditional z gate in the decoherence-free subspace of superconducting quantum-interference devices (SQUIDs) is presented based on the dispersive interaction. Each logic qubit is encoded in the ground states of two rf SQUIDs, which own lower energy and can be relatively stable in operation. By switching on/off the classical pulses and selecting the gating time appropriately, a high fidelity is obtained. Moreover, this scheme can be generalized to the multi-qubit case without changing the gating time.Keywords Conditional z gate · Decoherence-free subspaces · SQUID Quantum computer is a kind of information processor which uses the principles of superposition and entanglement of quantum mechanics to solve certain mathematical problems faster than classical computer, such as factorizing a number and searching for data in an array [1,2]. So far, a lot of substantial efforts have been dedicated to the field of quantum computation and a number of significant progresses have been made, for instance, iontrap system [3], cavity quantum electrodynamics (QED) [4,5], nuclear magnetic resonance (NMR) system [6] and linear optics [7].While the quantum computer is more powerful than the classical counterpart, the coherence between qubits would be destroyed since the system cannot be placed in a totally closed condition in practice. To avoid the decoherence effect, different methods are applied to implement quantum computation. A straight way is to find an effective path to suppress

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confidence: 99%

Robust Conditional z Gate Operation in the Decoherence-Free Subspace of Superconducting Quantum-Interference Devices

et al. 2009

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One-step implementing three-qubit phase gate via manipulating rf SQUID qubits in the decoherence-free subspace with respect to cavity decay

Shao

Zhang

et al. 2009

Chinese Phys. B

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Scalable quantum computing using persistent current qubits with Josephson junctions

Cited by 2 publications

References 7 publications

Robust Conditional z Gate Operation in the Decoherence-Free Subspace of Superconducting Quantum-Interference Devices

Robust Conditional z Gate Operation in the Decoherence-Free Subspace of Superconducting Quantum-Interference Devices

One-step implementing three-qubit phase gate via manipulating rf SQUID qubits in the decoherence-free subspace with respect to cavity decay

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