Suppressing classical noise in the accelerated geometric phase gate by optimized dynamical decoupling

  title={Suppressing classical noise in the accelerated geometric phase gate by optimized dynamical decoupling},
  author={Dawn Chen and Jun Jing},
  journal={Physical Review A},
In the quantum computation scenario, geometric phase-gates are becoming increasingly attractive due to their supposed intrinsic fault tolerance. In an adiabatic cyclic evolution, Berry phase appears to realize a geometric transformation. Performing the quantum gates as many as possible within the timescale of coherence, however, remains an inconvenient bottleneck due to the systematic errors. Here we propose an accelerated adiabatic quantum gate based on the Berry phase, the transitionless… 

Figures from this paper


Transitionless quantum driving
For a general quantum system driven by a slowly time-dependent Hamiltonian, transitions between instantaneous eigenstates are exponentially weak. But a nearby Hamiltonian exists for which the
Multiple-pulse coherence enhancement of solid state spin qubits.
We describe how the spin coherence time of a localized electron spin in solids, i.e., a solid state spin qubit, can be prolonged by applying designed electron spin resonance pulse sequences. In
Effects of Diffusion on Free Precession in Nuclear Magnetic Resonance Experiments
Nuclear resonance techniques involving free precession are examined, and, in particular, a convenient variation of Hahn's spin-echo method is described. This variation employs a combination of pulses
Modified Spin‐Echo Method for Measuring Nuclear Relaxation Times
A spin echo method adapted to the measurement of long nuclear relaxation times (T2) in liquids is described. The pulse sequence is identical to the one proposed by Carr and Purcell, but the rf of the
Environmental noise spectroscopy with qubits subjected to dynamical decoupling
A qubit subjected to pure dephasing due to classical Gaussian noise can be turned into a spectrometer of this noise by utilizing its readout under properly chosen dynamical decoupling (DD) sequences
How to Enhance Dephasing Time in Superconducting Qubits
We theoretically investigate the influence of designed pulse sequences in restoring quantum coherence lost due to background noise in superconducting qubits. We consider both $1/f$ noise and random
Robust nonadiabatic geometric quantum computation by dynamical correction
Besides the intrinsic noise resilience property, nonadiabatic geometric phases are of the fast evolution nature, and thus can naturally be used in constructing quantum gates with excellent
  • P. Alam
  • Medicine
    Composites Engineering: An A–Z Guide
  • 2021
A fluorescence-imaging-based endoscopic capsule that automates the detection process of colorectal cancer was designed and developed in the lab and offered great possibilities for future applicability in selective and specific detection of other fluorescently labelled cancers.
  • P. Alam
  • Composites Engineering: An A–Z Guide
  • 2021
Transitionless Quantum Driving in Spin Echo
Spin echo can be used to refocus random dynamical phases caused by inhomogeneities in control fields and thereby retain the purity of a spatial distribution of quantum spins. This technique for