Low-loss interconnects for modular superconducting quantum processors
- URL: http://arxiv.org/abs/2302.02751v1
- Date: Mon, 6 Feb 2023 12:57:34 GMT
- Title: Low-loss interconnects for modular superconducting quantum processors
- Authors: Jingjing Niu, Libo Zhang, Yang Liu, Jiawei Qiu, Wenhui Huang, Jiaxiang
Huang, Hao Jia, Jiawei Liu, Ziyu Tao, Weiwei Wei, Yuxuan Zhou, Wanjing Zou,
Yuanzhen Chen, Xiaowei Deng, Xiuhao Deng, Changkang Hu, Ling Hu, Jian Li,
Dian Tan, Yuan Xu, Fei Yan, Tongxing Yan, Song Liu, Youpeng Zhong, Andrew N.
Cleland, Dapeng Yu
- Abstract summary: We report low-loss interconnects based on pure aluminium coaxial cables and on-chip impedance transformers.
We use these interconnects to link five quantum modules with inter- module quantum state transfer and Bell state fidelities up to 99%.
Results represent a viable modular approach for large-scale superconducting quantum processors.
- Score: 20.903845602878302
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Scaling is now a key challenge in superconducting quantum computing. One
solution is to build modular systems in which smaller-scale quantum modules are
individually constructed and calibrated, and then assembled into a larger
architecture. This, however, requires the development of suitable
interconnects. Here, we report low-loss interconnects based on pure aluminium
coaxial cables and on-chip impedance transformers featuring quality factors up
to $8.1 \times 10^5$, which is comparable to the performance of our transmon
qubits fabricated on single-crystal sapphire substrate. We use these
interconnects to link five quantum modules with inter-module quantum state
transfer and Bell state fidelities up to 99\%. To benchmark the overall
performance of the processor, we create maximally-entangled, multi-qubit
Greenberger-Horne-Zeilinger (GHZ) states. The generated inter-module four-qubit
GHZ state exhibits 92.0\% fidelity. We also entangle up to 12 qubits in a GHZ
state with $55.8 \pm 1.8\%$ fidelity, which is above the genuine multipartite
entanglement threshold of 1/2. These results represent a viable modular
approach for large-scale superconducting quantum processors.
Related papers
- A Thin Film Lithium Niobate Near-Infrared Platform for Multiplexing Quantum Nodes [0.0]
Quantum networks will require quantum nodes consisting of many memory qubits.
This in turn will require strategies to multiplex memories and overcome the inhomogeneous distribution of their transition frequencies.
In this work, we realize a VNIR thin-film lithium niobate (TFLN) integrated photonics platform with the key components to meet these requirements.
arXiv Detail & Related papers (2024-05-07T00:13:46Z) - A Quantum-Classical Collaborative Training Architecture Based on Quantum
State Fidelity [50.387179833629254]
We introduce a collaborative classical-quantum architecture called co-TenQu.
Co-TenQu enhances a classical deep neural network by up to 41.72% in a fair setting.
It outperforms other quantum-based methods by up to 1.9 times and achieves similar accuracy while utilizing 70.59% fewer qubits.
arXiv Detail & Related papers (2024-02-23T14:09:41Z) - Multi-module microwave assembly for fast read-out and charge noise characterization of silicon quantum dots [0.6819010383838326]
We develop a superconductor-semiconductor multi-module microwave assembly to demonstrate charge state readout at the state-of-the-art.
The modular microwave circuitry presented here can be directly utilized in conjunction with other quantum device to improve the readout performance.
arXiv Detail & Related papers (2023-04-26T10:52:34Z) - High-rate sub-GHz linewidth bichromatic entanglement source for quantum
networking [59.191830955730346]
In this work, we study an entanglement source based on four-wave mixing in a diamond configuration in a warm rubidium vapor.
We are able to achieve in-fiber entangled pair generation rates greater than $107, /s$, orders of magnitude higher than previously reported atomic sources.
arXiv Detail & Related papers (2023-04-11T21:19:30Z) - Fluxonium Qubits in a Flip-Chip Package [0.6049992212584339]
We report work on fluxonium qubits packaged in a flip-chip architecture, where a classical control and readout chip is bump-bonded to the quantum chip.
We characterize the coherence properties of the individual fluxonium qubits, demonstrate high fidelity single-qubit gates with 6 ns microwave pulses, and identify the main decoherence mechanisms to improve on the reported results.
arXiv Detail & Related papers (2023-03-02T18:42:20Z) - Quantum emulation of the transient dynamics in the multistate
Landau-Zener model [50.591267188664666]
We study the transient dynamics in the multistate Landau-Zener model as a function of the Landau-Zener velocity.
Our experiments pave the way for more complex simulations with qubits coupled to an engineered bosonic mode spectrum.
arXiv Detail & Related papers (2022-11-26T15:04:11Z) - An integrated microwave-to-optics interface for scalable quantum
computing [47.187609203210705]
We present a new design for an integrated transducer based on a superconducting resonator coupled to a silicon photonic cavity.
We experimentally demonstrate its unique performance and potential for simultaneously realizing all of the above conditions.
Our device couples directly to a 50-Ohm transmission line and can easily be scaled to a large number of transducers on a single chip.
arXiv Detail & Related papers (2022-10-27T18:05:01Z) - Field-deployable Quantum Memory for Quantum Networking [62.72060057360206]
We present a quantum memory engineered to meet real-world deployment and scaling challenges.
The memory technology utilizes a warm rubidium vapor as the storage medium, and operates at room temperature.
We demonstrate performance specifications of high-fidelity retrieval (95%) and low operation error $(10-2)$ at a storage time of 160 $mu s$ for single-photon level quantum memory operations.
arXiv Detail & Related papers (2022-05-26T00:33:13Z) - High fidelity two-qubit gates on fluxoniums using a tunable coupler [47.187609203210705]
Superconducting fluxonium qubits provide a promising alternative to transmons on the path toward large-scale quantum computing.
A major challenge for multi-qubit fluxonium devices is the experimental demonstration of a scalable crosstalk-free multi-qubit architecture.
Here, we present a two-qubit fluxonium-based quantum processor with a tunable coupler element.
arXiv Detail & Related papers (2022-03-30T13:44:52Z) - Entanglement Across Separate Silicon Dies in a Modular Superconducting
Qubit Device [0.5265724177093087]
Assembling future large-scale quantum computers out of smaller, specialized modules promises to simplify a number of formidable science and engineering challenges.
One of the primary challenges in developing a modular architecture is in engineering high fidelity, low-latency quantum interconnects between modules.
Here we demonstrate a modular solid state architecture with deterministic inter-module coupling between four physically separate, interchangeable superconducting qubit integrated circuits.
arXiv Detail & Related papers (2021-02-26T03:43:05Z) - Deterministic multi-qubit entanglement in a quantum network [0.06546249968484792]
Scaling to large quantum communication or computation networks requires the deterministic generation of multi-qubit entanglement.
We report a quantum network comprising two separate superconducting quantum nodes connected by a 1 meter-long superconducting coaxial cable.
arXiv Detail & Related papers (2020-11-26T03:32:03Z)
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.