Landau-Zener Transitions in an Adiabatic Quantum Computer

Abstract

We report an experimental measurement of Landau-Zener transitions on an individual flux qubit within a multi-qubit superconducting chip designed for adiabatic quantum computation. The method used isolates a single qubit, tunes its tunneling amplitude Delta into the limit where Delta is much less than both the temperature T and the decoherence-induced energy level broadening, and forces it to undergo a Landau-Zener transition. We find that the behavior of the qubit agrees to a high degree of accuracy with theoretical predictions for Landau-Zener transition probabilities for a double-well quantum system coupled to 1/f magnetic flux noise.

4 pages, 4 figures

References in corpus (11)

• Mach-Zehnder Interferometry in a Strongly Driven Superconducting Qubit
• Error correcting codes for adiabatic quantum computation
• Dissipative Landau-Zener transitions of a qubit: bath-specific and universal behavior
• Towards Fault Tolerant Adiabatic Quantum Computation
• Thermally assisted adiabatic quantum computation
• Noise resistance of adiabatic quantum computation using random matrix theory
• Decoherence in adiabatic quantum computation
• Probing Noise in Flux Qubits via Macroscopic Resonant Tunneling
• Observation of macroscopic Landau-Zener transitions in a superconducting device
• Macroscopic Resonant Tunneling in the Presence of Low Frequency Noise
• Non-Markovian decoherence in the adiabatic quantum search algorithm

Cited by in corpus (21)

• Landau-Zener-Stuckelberg interferometry
• Experimental Investigation of an Eight Qubit Unit Cell in a Superconducting Optimization Processor
• Trade-off between speed and cost in shortcuts to adiabaticity
• Nonadiabatic Landau-Zener-Stückelberg-Majorana transitions, dynamics, and interference
• Entanglement in a quantum annealing processor
• Adiabatic Quantum Simulation of Quantum Chemistry
• Experimental Demonstration of a Robust and Scalable Flux Qubit
• Landau-Zener transitions in a two-level system coupled to a finite-temperature harmonic oscillator
• Measurement-assisted Landau-Zener transitions
• Dynamics of dissipative Landau-Zener transitions
• Finite-rate quenches of site bias in the Bose-Hubbard dimer
• Observation of Co-tunneling in Pairs of Coupled Flux Qubits
• Dissipative dynamics in a tunable Rabi dimer with periodic harmonic driving
• Non-Markovian incoherent quantum dynamics of a two-state system
• Single-Atom Verification of the Optimal Trade-Off between Speed and Cost in Shortcuts to Adiabaticity
• Real-time simulation of flux qubits used for quantum annealing
• Landau-Zener-Stückelberg Spectroscopy of a Superconducting Flux Qubit
• Population transfer driven by far-off-resonant fields
• Quantum nonequilibrium dynamics from Knizhnik-Zamolodchikov equations
• Two rate periodic protocol with dynamics driven through many cycles
• Dissipative Landau-Zener tunneling in the crossover regime from weak to strong environment coupling