Field-sensitive addressing and control of field-insensitive neutral-atom qubits

Abstract

The establishment of a scalable scheme for quantum computing with addressable and long-lived qubits would be a scientific watershed, harnessing the laws of quantum physics to solve classically intractable problems. The design of many proposed quantum computational platforms is driven by competing needs: isolating the quantum system from the environment to prevent decoherence, and easily and accurately controlling the system with external fields. For example, neutral-atom optical-lattice architectures provide environmental isolation through the use of states that are robust against fluctuating external fields, yet external fields are essential for qubit addressing. Here we demonstrate the selection of individual qubits with external fields, despite the fact that the qubits are in field-insensitive superpositions. We use a spatially inhomogeneous external field to map selected qubits to a different field-insensitive superposition ("optical MRI"), minimally perturbing unselected qubits, despite the fact that the addressing field is not spatially localized. We show robust single-qubit rotations on neutral-atom qubits located at selected lattice sites. This precise coherent control is an important step forward for lattice-based neutral-atom quantum computation, and is quite generally applicable to state transfer and qubit isolation in other architectures using field-insensitive qubits.

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Cited by in corpus (27)

• Quantum information with Rydberg atoms
• Single-Spin Addressing in an Atomic Mott Insulator
• Randomized benchmarking of single qubit gates in a 2D array of neutral atom qubits
• Coherent addressing of individual neutral atoms in a 3D optical lattice
• Generation and Detection of Atomic Spin Entanglement in Optical Lattices
• Composite pulses for interferometry in a thermal cold atom cloud
• Randomized benchmarking of atomic qubits in an optical lattice
• Quantum computing implementations with neutral particles
• Experimental observation of magic-wavelength behavior in optical lattice-trapped ${}^{87}$Rb
• Scalable Architecture for Quantum Information Processing with Atoms in Optical Micro-Structures
• Imprinting Patterns of Neutral Atoms in an Optical Lattice using Magnetic Resonance Techniques
• Quantum dark soliton (qubits) in Bose Einstein condensates
• Robust site-resolved quantum gates in an optical lattice via inhomogeneous control
• Fictitious magnetic field gradients in optical microtraps as an experimental tool for interrogating and manipulating cold atoms
• Exploiting the local polarization of strongly confined light for sub-micron-resolution internal state preparation and manipulation of cold atoms
• Three-Axis Measurement and Cancellation of Background Magnetic Fields to less than 50 uG in a Cold Atom Experiment
• Cluster state generation using van der Waals and dipole-dipole interactions in optical lattices
• Addressing Two-Level Systems Variably Coupled to an Oscillating Field
• Speeding up the spatial adiabatic passage of matter waves in optical microtraps by optimal control
• Entanglement of Two Atoms using Rydberg Blockade
• Optical Lattices for Atom Based Quantum Microscopy
• Two-qubit entangling gates between distant atomic qubits in a lattice
• Measurement and extinction of vector light shifts using interferometry of spinor condensates
• Observations of $\lambda /4$ structure in a low-loss radiofrequency-dressed optical lattice
• Suppression of Phase Decoherence in a Single Atomic Qubit
• Quench dynamics and statistics of measurements for a line of quantum spins in two dimensions
• Cyclicity of interaction frame transformations