Two-qubit gate in neutral atoms using transitionless quantum driving
- URL: http://arxiv.org/abs/2206.08915v1
- Date: Fri, 17 Jun 2022 17:51:49 GMT
- Title: Two-qubit gate in neutral atoms using transitionless quantum driving
- Authors: Archismita Dalal and Barry C. Sanders
- Abstract summary: A neutral-atom system serves as a promising platform for realizing gate-based quantum computing.
The two-qubit entangling gate fidelity lags behind competing platforms such as superconducting systems and trapped ions.
We propose a fast, robust, high-fidelity controlled-Z gate, based on the Rydberg-blockade mechanism, for neutral atoms.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: A neutral-atom system serves as a promising platform for realizing gate-based
quantum computing because of its capability to trap and control several atomic
qubits in different geometries and the ability to perform strong, long-range
interactions between qubits; however, the two-qubit entangling gate fidelity
lags behind competing platforms such as superconducting systems and trapped
ions. The aim of our work is to design a fast, robust, high-fidelity
controlled-Z (CZ) gate, based on the Rydberg-blockade mechanism, for neutral
atoms. We propose a gate procedure that relies on simultaneous and
transitionless quantum driving of a pair of atoms using broadband lasers. By
simulating a system of two interacting Caesium atoms, including spontaneous
emission from excited levels and parameter fluctuations, we yield a
Rydberg-blockade CZ gate with fidelity 0.9985 over an operation time of
$0.12~\mu$s. Our gate procedure delivers CZ gates that are superior than the
state-of-the-art experimental CZ gate and the simulated CZ gates based on
adiabatic driving of atoms. Our results show that our gate procedure carries
significant potential for achieving scalable quantum computing using neutral
atoms.
Related papers
- Universal high-fidelity quantum gates for spin-qubits in diamond [0.0]
Recent experiments have demonstrated multi-qubit quantum processors, optical interconnects, and basic quantum error correction protocols.
One of the key open challenges towards larger-scale systems is to realize high-fidelity universal quantum gates.
We design and demonstrate a complete high-fidelity gate set for the two-qubit system formed by the electron and nuclear spin of a nitrogen-vacancy center in diamond.
arXiv Detail & Related papers (2024-03-15T19:00:02Z) - Fast ZZ-Free Entangling Gates for Superconducting Qubits Assisted by a
Driven Resonator [42.152052307404]
We propose a simple scheme to cancel stray interactions between qubits.
We numerically show that such a scheme can enable short and high-fidelity entangling gates.
Our architecture is not only ZZ free but also contains no extra noisy components.
arXiv Detail & Related papers (2023-11-02T15:42:02Z) - A SWAP Gate for Spin Qubits in Silicon [5.6151418663848744]
We show a fast SWAP gate with a duration of 25 ns based on quantum dots in isotopically enriched silicon.
We calibrate the single-qubit local phases during the SWAP gate by incorporating single-qubit gates in our circuit.
These results pave the way for high fidelity SWAP gates, and processes based on them, such as quantum communication on chip and quantum simulation.
arXiv Detail & Related papers (2023-10-10T15:24:15Z) - Quantum Gate Optimization for Rydberg Architectures in the Weak-Coupling
Limit [55.05109484230879]
We demonstrate machine learning assisted design of a two-qubit gate in a Rydberg tweezer system.
We generate optimal pulse sequences that implement a CNOT gate with high fidelity.
We show that local control of single qubit operations is sufficient for performing quantum computation on a large array of atoms.
arXiv Detail & Related papers (2023-06-14T18:24:51Z) - High-fidelity parallel entangling gates on a neutral atom quantum
computer [41.74498230885008]
We report the realization of two-qubit entangling gates with 99.5% fidelity on up to 60 atoms in parallel.
These advances lay the groundwork for large-scale implementation of quantum algorithms, error-corrected circuits, and digital simulations.
arXiv Detail & Related papers (2023-04-11T18:00:04Z) - Quantum process tomography of continuous-variable gates using coherent
states [49.299443295581064]
We demonstrate the use of coherent-state quantum process tomography (csQPT) for a bosonic-mode superconducting circuit.
We show results for this method by characterizing a logical quantum gate constructed using displacement and SNAP operations on an encoded qubit.
arXiv Detail & Related papers (2023-03-02T18:08:08Z) - Coherent effects contribution to a fast gate fidelity in ion quantum
computer [47.187609203210705]
We develop a numerical model for full simulation of coherence effects using a linear ion microtrap array and a 2D microtrap array.
We have also studied the dependency of the gate fidelity on the laser power fluctuations.
arXiv Detail & Related papers (2021-12-12T12:53:00Z) - A universal quantum gate set for transmon qubits with strong ZZ
interactions [16.56373732567445]
High-fidelity single- and two-qubit gates are essential building blocks for a fault-tolerant quantum computer.
One limiting factor is the residual ZZ-interaction, which originates from a coupling between computational states and higher-energy states.
We experimentally demonstrate that it can be exploited to produce a universal set of fast single- and two-qubit entangling gates.
arXiv Detail & Related papers (2021-03-23T04:46:55Z) - Experimental Realization of Nonadiabatic Holonomic Single-Qubit Quantum
Gates with Two Dark Paths in a Trapped Ion [41.36300605844117]
We show nonadiabatic holonomic single-qubit quantum gates on two dark paths in a trapped $171mathrmYb+$ ion based on four-level systems with resonant drives.
We find that nontrivial holonomic two-qubit quantum gates can also be realized within current experimental technologies.
arXiv Detail & Related papers (2021-01-19T06:57:50Z) - Fast universal two-qubit gate for neutral fermionic atoms in optical
tweezers [0.0]
We present a method to perform a fast universal square-root-SWAP gate with fermionic atoms.
We prove analytically that in the limit of broad atomic wave-packets, the fidelity of the gate approaches unity.
A gate with such features is an important milestone towards all-to-all connectivity and fault tolerance in quantum computation with neutral atoms.
arXiv Detail & Related papers (2020-08-22T12:01:31Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.