Prospects for fast Rydberg gates on an atom chip

Abstract

Atom chips are a promising candidate for a scalable architecture for quantum information processing provided a universal set of gates can be implemented with high fidelity. The difficult part in achieving universality is the entangling two-qubit gate. We consider a Rydberg phase gate for two atoms trapped on a chip and employ optimal control theory to find the shortest gate that still yields a reasonable gate error. Our parameters correspond to a situation where the Rydberg blockade regime is not yet reached. We discuss the role of spontaneous emission and the effect of noise from the chip surface on the atoms in the Rydberg state.

20 pages, 10 figures, submitted to special issue "Quantum Information with Neutral Particles" of "Quantum Information Processing"

References in corpus (12)

• Scaling and Suppression of Anomalous Quantum Decoherence in Ion Traps
• Temperature Dependence of Electric Field Noise Above Gold Surfaces
• Spatially Resolved Excitation of Rydberg Atoms and Surface Effects on an Atom Chip
• Microwave potentials and optimal control for robust quantum gates on an atom chip
• Simplified motional heating rate measurements of trapped ions
• Fabrication and heating rate study of microscopic surface electrode ion traps
• Protecting coherence in Optimal Control Theory: State dependent constraint approach
• The Quantum Speed Limit of Optimal Controlled Phasegates for Trapped Neutral Atoms
• Rydberg state mediated quantum gates and entanglement of pairs of neutral atoms
• Temperature-invariant Casimir-Polder forces despite large thermal photon numbers
• Energy shifts of Rydberg atoms due to patch fields near metal surfaces
• A Chebychev propagator for inhomogeneous Schrödinger equations

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• High-fidelity Rydberg-blockade entangling gate using shaped, analytic pulses
• Efficient Arbitrary Simultaneously Entangling Gates on a trapped-ion quantum computer
• Fidelity of a Rydberg blockade quantum gate from simulated quantum process tomography
• Towards an experimentally feasible controlled-phase gate on two blockaded Rydberg atoms
• Quantum logic and entanglement by neutral Rydberg atoms: methods and fidelity
• Asymmetric blockade and multi-qubit gates via dipole-dipole interactions
• Electric field sensing near the surface microstructure of an atom chip using cold Rydberg atoms
• Coherent manipulation of cold Rydberg atoms near the surface of an atom chip
• Rydberg atoms with a reduced sensitivity to dc and low-frequency electric fields
• Optimal control of Rydberg lattice gases
• Single temporal-pulse-modulated parameterized controlled-phase gate for Rydberg atoms
• Annulled van der Waals interaction and fast Rydberg quantum gates
• Dynamical Casimir-Polder interaction between an atom and surface plasmons
• Rydberg quantum computation with nuclear spins in two-electron neutral atoms
• Trapping of Rydberg Atoms in Tight Magnetic Microtraps
• Magnetic near fields as a probe of charge transport in spatially dispersive conductors
• Efficient generation of multiqubit entanglement states using rapid adiabatic passage
• Chirped pulse excitation of two-atom Rydberg states