Composite Mølmer-Sørensen gate
- URL: http://arxiv.org/abs/2501.18436v2
- Date: Mon, 10 Feb 2025 16:10:39 GMT
- Title: Composite Mølmer-Sørensen gate
- Abstract summary: The Molmer-Sorensen (MS) gate is a two-qubit controlled-phase gate in ion traps.<n>We propose an amplitude-modulated composite MS gate which features high fidelity robust to gate timing, detuning and coupling errors.
- Score: 0.0
- License: http://creativecommons.org/licenses/by-nc-sa/4.0/
- Abstract: The M{\o}lmer-S{\o}rensen (MS) gate is a two-qubit controlled-phase gate in ion traps that is highly valued due to its ability to preserve the motional state of the ions. However, its fidelity is obstructed by errors affecting the motion of the ions as well as the rotation of the qubits. In this work, we propose an amplitude-modulated composite MS gate which features high fidelity robust to gate timing, detuning and coupling errors.
Related papers
- Entangling ions with engineered light gradients [54.616816054906025]
Spectral crowding of collective motional modes limits the fidelity of entangling interactions in trapped-ion quantum processors.<n>We introduce a geometric-phase entangling interaction driven by a transverse, time-dependent structured-light force.<n>We experimentally realise high-fidelity two-qubit gates with error rates below $5times10-3$ in ion crystals containing up to 12 ions confined within a single potential well.
arXiv Detail & Related papers (2026-03-08T09:18:24Z) - High-fidelity all-microwave CZ gate with partial erasure-error detection via a transmon coupler [1.5649495995972291]
We experimentally demonstrate an all-microwave controlled-frequency (CZZ) gate that achieves high fidelity while suppressing residual ZZ interactions.<n>We can maintain a small interaction between two data transmons while coupling between the data and coupler transmons to accelerate the CZ-gate speed.
arXiv Detail & Related papers (2025-11-03T06:11:18Z) - Cross-Resonant Gates in Hybrid Fluxonium-Transmon Systems [2.1564237522129335]
We propose a scalable fluxonium-transmon-fluxonium (FTF) system that utilizes a central transmon to mediate high-fidelity gates and parity checks between two fluxonium qubits.<n>This approach suppresses unwanted long-range interactions, which is critical for developing larger quantum processors.
arXiv Detail & Related papers (2025-09-09T17:18:27Z) - Multi-Target Rydberg Gates via Spatial Blockade Engineering [47.582155477608445]
Multi-target gates offer the potential to reduce gate depth in syndrome extraction for quantum error correction.
We propose single-control-multi-target CZotimes N gates on a single-species neutral-atom platform.
We synthesise smooth control pulses for CZZ and CZZZ gates, achieving fidelities of up to 99.55% and 99.24%, respectively.
arXiv Detail & Related papers (2025-04-21T17:59:56Z) - Fast Mølmer-Sørensen gates in trapped-ion quantum processors with compensated carrier transition [0.0]
We present an approach to design laser pulse shapes for the Molmer-Sorensen gate in ion chains.
We show that the fast-oscillating carrier term effectively modifies the spin-dependent forces acting on ions, and this can be compensated by a simple nonlinear transformation of a laser pulse.
arXiv Detail & Related papers (2025-01-04T21:33:24Z) - 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) - Mitigating crosstalk errors by randomized compiling: Simulation of the
BCS model on a superconducting quantum computer [41.94295877935867]
Crosstalk errors, stemming from CNOT two-qubit gates, are a crucial source of errors on numerous quantum computing platforms.
We develop and apply an extension of the randomized compiling protocol that includes a special treatment of neighboring qubits.
Our twirling of neighboring qubits is shown to dramatically improve the noise estimation protocol without the need to add new qubits or circuits.
arXiv Detail & Related papers (2023-05-03T18:00:02Z) - Bespoke Pulse Design for Robust Rapid Two-Qubit Gates with Trapped Ions [0.0]
Two-qubit gates with addressed Raman beams within a linear trapped-ion chain by a quantum master equation (QME)
QME incorporates the single-ion two-photon effective Rabi frequency, Autler-Townes and vibrational Bloch-Siegert energy shifts, off-resonant transitions, Raman and Rayleigh scattering, laser-power fluctuations, motional heating, cross-Kerr phonon coupling, laser, asymmetric addressing beams, with no fitting parameters.
Our robust quantum control delivers rapid high-quality two-qubit gates in long ion chains, enabling scalable quantum computing with trapped ions.
arXiv Detail & Related papers (2022-12-01T18:06:44Z) - Microwave-activated gates between a fluxonium and a transmon qubit [59.95978973946985]
We propose and analyze two types of microwave-activated gates between a fluxonium and a transmon qubit.
For a medium-frequency fluxonium qubit, the transmon-fluxonium system allows for a cross-resonance effect mediated by the higher levels of the fluxonium.
A fast microwave CPHASE gate can be implemented using the higher levels of the fluxonium.
arXiv Detail & Related papers (2022-06-13T14:34:11Z) - CNOT gates for fluxonium qubits via selective darkening of transitions [2.7080431315882967]
We analyze the cross-resonance effect for fluxonium circuits and investigate a two-qubit gate scheme based on selective darkening of a transition.
We show that gate error below $10-4$ is possible for realistic hardware parameters.
arXiv Detail & Related papers (2022-02-09T17:27:34Z) - A simplified Mølmer-Sørensen gate for the trapped ion quantum computer [0.0]
We discuss how to simplify the Molmer-Sorensen (MS) gate which is used for the trapped ion quantum computer.
We propose a method for transforming a separable state of two ions into one of the Bell states by illuminating the two ions with monochromatic coherent light fields individually.
arXiv Detail & Related papers (2021-12-15T03:25:19Z) - 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) - Analytical and experimental study of center line miscalibrations in M\o
lmer-S\o rensen gates [51.93099889384597]
We study a systematic perturbative expansion in miscalibrated parameters of the Molmer-Sorensen entangling gate.
We compute the gate evolution operator which allows us to obtain relevant key properties.
We verify the predictions from our model by benchmarking them against measurements in a trapped-ion quantum processor.
arXiv Detail & Related papers (2021-12-10T10:56:16Z) - Entangling-gate error from coherently displaced motional modes of
trapped ions [0.0]
Entangling gates in trapped-ion quantum computing have primarily targeted stationary ions with initial motional distributions that are thermal and close to the ground state.
Future systems will likely incur significant non-thermal excitation due to, e.g., ion transport, longer operational times, and increased spatial extent of the trap array.
We analyze the impact of such coherent motional excitation on entangling-gate error by performing simulations of Molmer-Sorenson gates on a pair of trapped-ion qubits with both thermal and coherent excitation present in a shared motional mode at the start of the gate.
arXiv Detail & Related papers (2021-09-09T16:33:45Z) - Realization of high-fidelity CZ and ZZ-free iSWAP gates with a tunable
coupler [40.456646238780195]
Two-qubit gates at scale are a key requirement to realize the full promise of quantum computation and simulation.
We present a systematic approach that goes beyond the dispersive approximation to exploit the engineered level structure of the coupler and optimize its control.
We experimentally demonstrate CZ and $ZZ$-free iSWAP gates with two-qubit interaction fidelities of $99.76 pm 0.07$% and $99.87 pm 0.23$%, respectively.
arXiv Detail & Related papers (2020-11-02T19:09:43Z) - Scalable quantum computation with fast gates in two-dimensional
microtrap arrays of trapped ions [68.8204255655161]
We investigate the use of fast pulsed two-qubit gates for trapped ion quantum computing in a two-dimensional microtrap architecture.
We demonstrate that fast pulsed gates are capable of implementing high-fidelity entangling operations between ions in neighbouring traps faster than the trapping period.
arXiv Detail & Related papers (2020-05-01T13:18:22Z) - 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.