Counterdiabatic driving at Rydberg excitation for symmetric $C_Z$ gates with ultracold neutral atoms
- URL: http://arxiv.org/abs/2510.04766v1
- Date: Mon, 06 Oct 2025 12:40:23 GMT
- Title: Counterdiabatic driving at Rydberg excitation for symmetric $C_Z$ gates with ultracold neutral atoms
- Authors: I. I. Beterov, K. V. Kozenko, P. Xu, I. I. Ryabtsev,
- Abstract summary: We extend the scheme of neutral atom Rydberg $C_Z$ gate based on double sequence of adiabatic pulses applied symmetrically to both atoms.<n>This provides substantial reducing of quantum gate operation times (at least five times) compared to previously proposed adiabatic schemes.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We extend the scheme of neutral atom Rydberg $C_Z$ gate based on double sequence of adiabatic pulses applied symmetrically to both atoms using counterdiabatic driving in the regime of Rydberg blockade. This provides substantial reducing of quantum gate operation times (at least five times) compared to previously proposed adiabatic schemes, which is important for high-fidelity entanglement due to finite Rydberg lifetimes. We analyzed schemes of adiabatic rapid passage with counterdiabatic driving for single-photon, two-photon and three-photon schemes of Rydberg excitation for rubidium and cesium atoms. We designed laser pulse profiles with fully analytical shapes and calculated the Bell fidelity taking into account atomic lifetimes and finite blockade strengths. We show that the upper limit of the Bell fidelity reaches ${\mathcal F}\simeq0.9999$ in a room-temperature environment.
Related papers
- The (PXP)$^2$ model: long-range quantum scars in optical cavities [33.77676777949295]
Rydberg-cavity systems are emerging as promising platforms for quantum simulation and quantum information processing.<n>In this work, we introduce a minimal and scalable model for such systems.
arXiv Detail & Related papers (2025-10-02T17:33:41Z) - Quantum computing architecture with Rydberg gates in trapped ions [32.098763269499315]
We propose an entangling scheme for arbitrary pairs of ions in a linear crystal.<n>We reveal order of $mu s$ operation times within any of the qubit pairs in a small crystal.
arXiv Detail & Related papers (2024-11-29T13:17:43Z) - Quantum gates between distant atoms mediated by a Rydberg excitation antiferromagnet [0.0]
We present a novel protocol for implementing quantum gates between distant atomic qubits connected by an array of neutral atoms.<n>The protocol is based on adiabatically transferring the atoms in the array to an antiferro-magnetic-like state of Rydberg excitations using chirped laser pulses.
arXiv Detail & Related papers (2024-08-21T11:44:09Z) - Emergence of non-Abelian SU(2) invariance in Abelian frustrated
fermionic ladders [37.69303106863453]
We consider a system of interacting spinless fermions on a two-leg triangular ladder with $pi/2$ magnetic flux per triangular plaquette.
Microscopically, the system exhibits a U(1) symmetry corresponding to the conservation of total fermionic charge, and a discrete $mathbbZ$ symmetry.
At the intersection of the three phases, the system features a critical point with an emergent SU(2) symmetry.
arXiv Detail & Related papers (2023-05-11T15:57:27Z) - High-fidelity Rydberg controlled-Z gates with optimal pulses [0.0]
We numerically investigate the time-optimal pulses to generate a high-fidelity Rydberg $C_Z$ gate in a three-level ladder-type atomic system.
Our results promise a high-fidelity and fast gate operation under amenable and controllable experimental parameters.
arXiv Detail & Related papers (2023-03-29T02:16:49Z) - Spatial dependence of fidelity for a two-qubit Rydberg-blockade quantum
gate [0.0]
We study the spatial performance of the entangling gate proposed by H. Levine et al.
This gate is based on a Rydberg blockade technique and consists of just two global laser pulses which drive nearby atoms.
arXiv Detail & Related papers (2022-06-24T09:18:56Z) - Neutral atom entanglement using adiabatic Rydberg dressing [0.0]
We revisit the implementation of a two-qubit entangling gate, the Molmer-Sorensen gate, using the adiabatic Rydberg dressing paradigm for neutral atoms.
arXiv Detail & Related papers (2022-05-25T15:40:20Z) - High-fidelity multiqubit Rydberg gates via two-photon adiabatic rapid
passage [0.0]
We present a robust protocol for implementing high-fidelity multiqubit controlled phase gates on neutral atom qubits.
Our results highlight the ultility of neutral atom arrays for the native implementation of multiqubit unitaries.
arXiv Detail & Related papers (2021-12-24T10:25:22Z) - Characterization of an atom interferometer in the quasi-Bragg regime [58.720142291102135]
We focus on an intermediate regime between the Raman-Nath and the Bragg regimes, the so-called quasi-Bragg regime.
The experimental results are in a good agreement with a full numerical integration of the Schr"odinger equation.
arXiv Detail & Related papers (2021-12-06T14:49:45Z) - High fidelity entanglement of neutral atoms via a Rydberg-mediated
single-modulated-pulse controlled-PHASE gate [21.457325761297675]
We report experimental results in realizing a two-qubit controlled-PHASE($C_Z$) gate via off-resonant modulated driving(ORMD) embedded in two-photon transition for Rb atoms.
Our work features completing the $C_Z$ gate operation within a single pulse to avoid shelved Rydberg population.
arXiv Detail & Related papers (2021-09-06T13:52:45Z) - Qubit regularization of asymptotic freedom [35.37983668316551]
Heisenberg-comb acts on a Hilbert space with only two qubits per spatial lattice site.
We show that the model reproduces the universal step-scaling function of the traditional model up to correlation lengths of 200,000 in lattice units.
We argue that near-term quantum computers may suffice to demonstrate freedom.
arXiv Detail & Related papers (2020-12-03T18:41:07Z) - Robust Mølmer-Sørensen gate for neutral atoms using rapid adiabatic Rydberg dressing [0.0]
We show that adiabatic rapid passage by Rydberg dressing provides a mechanism for implementing two-qubit entangling gates.<n>We find that the typical error in implementing a two-qubit gate, such as the controlled phase gate, is dominated by errors in the single atom light shift.
arXiv Detail & Related papers (2019-11-11T02:48:18Z)
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.