scholarly journals Phase-Adaptive Dynamical Decoupling Methods for Robust Spin-Spin Dynamics in Trapped Ions

2021 ◽  
Vol 15 (3) ◽  
Author(s):  
Lijuan Dong ◽  
Iñigo Arrazola ◽  
Xi Chen ◽  
Jorge Casanova
Keyword(s):  
Spin Dynamics ◽  
Trapped Ions ◽  
Dynamical Decoupling

scholarly journals Experimental Uhrig dynamical decoupling using trapped ions

2009 ◽  
Vol 79 (6) ◽  
Author(s):  
Michael J. Biercuk ◽  
Hermann Uys ◽  
Aaron P. VanDevender ◽  
Nobuyasu Shiga ◽  
Wayne M. Itano ◽  
...  
Keyword(s):  
Trapped Ions ◽  
Dynamical Decoupling

scholarly journals Robust optical clock transitions in trapped ions using dynamical decoupling

2019 ◽  
Vol 21 (8) ◽  
pp. 083040 ◽  
Author(s):  
Nati Aharon ◽  
Nicolas Spethmann ◽  
Ian D Leroux ◽  
Piet O Schmidt ◽  
Alex Retzker
Keyword(s):  
Trapped Ions ◽  
Optical Clock ◽  
Dynamical Decoupling

scholarly journals Towards Generation of Cat States in Trapped Ions Set-Ups via FAQUAD Protocols and Dynamical Decoupling

Entropy ◽  
2019 ◽  
Vol 21 (12) ◽  
pp. 1207
Author(s):  
Mikel Palmero ◽  
Miguel Ángel Simón ◽  
Dario Poletti
Keyword(s):  
State Of The Art ◽  
Trapped Ions ◽  
Entangled States ◽  
High Fidelity ◽  
Superposition State ◽  
Final Time ◽  
Dynamical Decoupling ◽  
Dissipative Effects ◽  
Cat States ◽  
Many Particles

The high fidelity generation of strongly entangled states of many particles, such as cat states, is a particularly demanding challenge. One approach is to drive the system, within a certain final time, as adiabatically as possible, in order to avoid the generation of unwanted excitations. However, excitations can also be generated by the presence of dissipative effects such as dephasing. Here we compare the effectiveness of Local Adiabatic and the FAst QUasi ADiabatic protocols in achieving a high fidelity for a target superposition state both with and without dephasing. In particular, we consider trapped ions set-ups in which each spin interacts with all the others with the uniform coupling strength or with a power-law coupling. In order to mitigate the effects of dephasing, we complement the adiabatic protocols with dynamical decoupling and we test its effectiveness. The protocols we study could be readily implemented with state-of-the-art techniques.

scholarly journals Quantum spin dynamics and entanglement generation with hundreds of trapped ions

Science ◽  
2016 ◽  
Vol 352 (6291) ◽  
pp. 1297-1301 ◽  
Author(s):  
J. G. Bohnet ◽  
B. C. Sawyer ◽  
J. W. Britton ◽  
M. L. Wall ◽  
A. M. Rey ◽  
...  
Keyword(s):  
Spin Dynamics ◽  
Quantum Spin ◽  
Trapped Ions ◽  
Entanglement Generation

scholarly journals Pulsed dynamical decoupling for fast and robust two-qubit gates on trapped ions

2018 ◽  
Vol 97 (5) ◽  
Author(s):  
I. Arrazola ◽  
J. Casanova ◽  
J. S. Pedernales ◽  
Z.-Y. Wang ◽  
E. Solano ◽  
...  
Keyword(s):  
Trapped Ions ◽  
Dynamical Decoupling

The Damping Term, from First Principles

2017 ◽  
Author(s):  
Olle Eriksson ◽  
Anders Bergman ◽  
Lars Bergqvist ◽  
Johan Hellsvik
Keyword(s):  
Density Functional Theory ◽  
First Principles ◽  
Density Functional ◽  
Spin Dynamics ◽  
Damping Term ◽  
Functional Theory ◽  
Basic Principles ◽  
Sham Equation ◽  
Damping Parameter ◽  
Simulation Cell

In the previous chapters we described the basic principles of density functional theory, gave examples of how accurate it is to describe static magnetic properties in general, and derived from this basis the master equation for atomistic spin-dynamics; the SLL (or SLLG) equation. However, one term was not described in these chapters, namely the damping parameter. This parameter is a crucial one in the SLL (or SLLG) equation, since it allows for energy and angular momentum to dissipate from the simulation cell. The damping parameter can be evaluated from density functional theory, and the Kohn-Sham equation, and it is possible to determine its value experimentally. This chapter covers in detail the theoretical aspects of how to calculate theoretically the damping parameter. Chapter 8 is focused, among other things, on the experimental detection of the damping, using ferromagnetic resonance.

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