Superconducting qubit network with controllable nearest neighbor coupling

Abstract

We investigate the design and functionality of a network of loop-shaped charge qubits with switchable nearest-neighbor coupling. The qubit coupling is achieved by placing large Josephson junctions at the intersections of the qubit loops and selectively applying bias currents. The network is scalable and makes it possible to perform a universal set of quantum gates. The coupling scheme allows gate operation at the charge degeneracy point of each qubit, and also applies to charge-phase qubits. Additional Josephson junctions included in the qubit loops for qubit readout can also be employed for qubit coupling.

23 pages, 4 figures

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Cited by in corpus (17)

• Quantum information processing with superconducting circuits: a review
• Quantum information processing with circuit quantum electrodynamics
• Selective coupling of superconducting qubits via tunable stripline cavity
• RFSQUID-Mediated Coherent Tunable Coupling Between a Superconducting Phase Qubit and a Lumped Element Resonator
• Two-dimensional cavity grid for scalable quantum computation with superconducting circuits
• Using Superconducting Qubit Circuits to Engineer Exotic Lattice Systems
• Entanglement dynamics in chains of qubits with noise and disorder
• Interqubit coupling mediated by a high-excitation-energy quantum object
• Ground state cooling of a nanomechanical resonator via a Cooper pair box qubit
• Measurement-based Synthesis of multi-qubit Entangled States in Superconducting Cavity QED
• Observing pure effects of counter-rotating terms without ultrastrong coupling: A single photon can simultaneously excite two qubits
• Analysis of a tuneable coupler for superconducting phase qubits
• Spectroscopy of superconducting charge qubits coupled by a Josephson inductance
• Selective darkening of degenerate transitions for implementing quantum controlled-NOT gates
• Double resonance response of a superconducting quantum metamaterial: manifestation of non-classical states of photons
• Stability of longitudinal coupling for Josephson charge qubits
• Relaxation of Rabi Dynamics in a Superconducting Multiple-Qubit Circuit