# Coherent effects contribution to a fast gate fidelity in ion quantum computer

@inproceedings{Sidorov2021CoherentEC, title={Coherent effects contribution to a fast gate fidelity in ion quantum computer}, author={Pavel Sidorov and Mikhail Aksenov and Ilia Zalivako and Alexander Borisenko and Ilya Semerikov and Ksenia Yu Khabarova and Nikolai Kolachevsky P.N. Lebedev Physical Institute and Russian Quantum Center}, year={2021} }

Trapped ions are one of the most promising platforms for quantum computing due to the longest qubit coherence times and the highest gate fidelities. However, scaling the number of ions (qubits) in a linear Coulomb crystal is the key difficulty on the way to multi-qubit systems. One of the promising pathways to scale the number of qubits is to implement the pulsed non-adiabatic gates based on the sequence of State Dependent Kicks (SDKs). We have analytically and numerically studied the influence…

## References

SHOWING 1-10 OF 41 REFERENCES

### Fast quantum logic gates with trapped-ion qubits

- PhysicsNature
- 2018

This work demonstrates entanglement generation for gate times as short as 480 nanoseconds—less than a single oscillation period of an ion in the trap and eight orders of magnitude shorter than the memory coherence time measured in similar calcium-43 hyperfine qubits.

### Experimental demonstration of a robust, high-fidelity geometric two ion-qubit phase gate

- PhysicsNature
- 2003

A universal geometric π-phase gate between two beryllium ion-qubits is demonstrated, based on coherent displacements induced by an optical dipole force, which makes it attractive for a multiplexed trap architecture that would enable scaling to large numbers of ions.

### Optimized fast gates for quantum computing with trapped ions

- Computer Science
- 2020

An efficient approach to optimising pulse sequences for implementing fast entangling two-qubit gates on trapped ion quantum information processors and proposes two novel gate schemes that outperform existing schemes in terms of achievable gate speed and fidelity for feasible laser repetition rates.

### A scalable quantum computer with ions in an array of microtraps

- PhysicsNature
- 2000

A model for an ion trap quantum computer that combines scalability (a feature usually associated with solid state proposals) with the advantages of quantum optical systems (in particular, quantum control and long decoherence times) is proposed.

### Observation of a many-body dynamical phase transition with a 53-qubit quantum simulator

- PhysicsNature
- 2017

Here, a quantum simulator composed of up to 53 qubits is used to study non-equilibrium dynamics in the transverse-field Ising model with long-range interactions, enabling the dynamical phase transition to be probed directly and revealing computationally intractable features that rely on the long- range interactions and high connectivity between qubits.

### Single-qubit quantum memory exceeding ten-minute coherence time

- Physics
- 2017

A long-time quantum memory capable of storing and measuring quantum information at the single-qubit level is an essential ingredient for practical quantum computation and communication1,2. Currently,…

### Realization of the Cirac–Zoller controlled-NOT quantum gate

- PhysicsNature
- 2003

This work implements a CNOT quantum gate according to the Cirac–Zoller proposal, which relies on recently developed precise control of atomic phases and the application of composite pulse sequences adapted from nuclear magnetic resonance techniques.

### A Study on Fast Gates for Large-Scale Quantum Simulation with Trapped Ions

- Physics, Computer ScienceScientific reports
- 2017

The performance of a large-scale digital simulator is analyzed, and it is found that fidelity of around 70% is realizable for π-pulse infidelities below 10−5 in traps subject to realistic rates of heating and dephasing.

### Trapped-ion quantum computing: Progress and challenges

- PhysicsApplied Physics Reviews
- 2019

The state of the field is reviewed, covering the basics of how trapped ions are used for QC and their strengths and limitations as qubits and the outlook for trapped-ion QC is explored.

### Entanglement in a 20-Qubit Superconducting Quantum Computer

- PhysicsScientific Reports
- 2019

The extent to which entanglement is found within a prepared graph state on the 20-qubit superconducting quantum computer IBM Q Poughkeepsie is investigated and positive direction of progress towards the goal of implementing complex quantum algorithms relying on such effects is indicated.