Experimental realization of direct entangling gates between dual-type qubits

• URL: http://arxiv.org/abs/2410.05659v1
• Date: Tue, 8 Oct 2024 03:18:29 GMT
• Title: Experimental realization of direct entangling gates between dual-type qubits
• Authors: Chenxi Wang, Chuanxin Huang, Hongxuan Zhang, Hongyuan Hu, Zhichao Mao, Panyu Hou, Yukai Wu, Zichao Zhou, Luming Duan,
• Abstract summary: We demonstrate a direct entangling gate between dual-type qubits encoded in the $S_1/2$ and $D_5/2$ hyperfine equations of $137mathrmBa+$ ions. We achieve a Bell state fidelity of $96.3(4)%$ for the dual-type Molmer-Sorensen gate between an $S$-$D$ ion pair, comparable to that for the same-type $S$-$S$ or $D$-$D$ gates. This technique can reduce the overhead for back-
• Score: 2.8241239147294883
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Dual-type qubits have become a promising way to suppress the crosstalk error of auxiliary operations in large-scale ion trap quantum computation. Here we demonstrate a direct entangling gate between dual-type qubits encoded in the $S_{1/2}$ and $D_{5/2}$ hyperfine manifolds of $^{137}\mathrm{Ba}^{+}$ ions. Our scheme is economic in the hardware, requiring only a single $532\,$nm laser system to entangle both qubit types by driving their Raman transitions. We achieve a Bell state fidelity of $96.3(4)\%$ for the dual-type Molmer-Sorensen gate between an $S$-$D$ ion pair, comparable to that for the same-type $S$-$S$ or $D$-$D$ gates. This technique can reduce the overhead for back-and-forth conversions between dual-type qubits in the quantum circuit with wide applications in quantum error correction and ion-photon quantum networks.

Related papers

• Towards large-scale quantum optimization solvers with few qubits [59.63282173947468]
  We introduce a variational quantum solver for optimizations over $m=mathcalO(nk)$ binary variables using only $n$ qubits, with tunable $k>1$. We analytically prove that the specific qubit-efficient encoding brings in a super-polynomial mitigation of barren plateaus as a built-in feature.
  arXiv  Detail & Related papers  (2024-01-17T18:59:38Z)
• Realization of a crosstalk-avoided quantum network node with dual-type qubits by the same ion species [0.20288584947488558]
  We generate ion photon entanglement for the $S$-qubit in a typical timescale of hundreds of milliseconds. Our work demonstrates an enabling function of the dual-type qubit scheme for scalable quantum networks.
  arXiv  Detail & Related papers  (2023-06-26T03:38:36Z)
• A low-crosstalk double-side addressing system using acousto-optic deflectors for atomic ion qubits [43.30164109590217]
  We demonstrate a low-crosstalk double-side addressing system based on a pair of acousto-optic deflectors (AODs) The AODs addressing method can flexibly and parallelly address arbitrary ions between which the distance is variable in a chain. We employ two 0.4NA objective lenses in both arms of the Raman laser and obtain a beam waist of 0.95$mumathrmm$, resulting in a Rabi rate crosstalk as low as $6.32times10-4$ when the neighboring ion separation is about 5.5$mu
  arXiv  Detail & Related papers  (2023-06-02T07:12:59Z)
• Cat-qubit-inspired gate on cos($2\theta$) qubits [77.34726150561087]
  We introduce a single-qubit $Z$ gate inspired by the noise-bias preserving gate of the Kerr-cat qubit. This scheme relies on a $pi$ rotation in phase space via a beamsplitter-like transformation between a qubit and ancilla qubit.
  arXiv  Detail & Related papers  (2023-04-04T23:06:22Z)
• Universal qudit gate synthesis for transmons [44.22241766275732]
  We design a superconducting qudit-based quantum processor. We propose a universal gate set featuring a two-qudit cross-resonance entangling gate. We numerically demonstrate the synthesis of $rm SU(16)$ gates for noisy quantum hardware.
  arXiv  Detail & Related papers  (2022-12-08T18:59:53Z)
• Realizing quantum gates with optically-addressable $^{171}$Yb$^{+}$ ion qudits [0.0]
  We present a proof-of-principle realization of a quantum processor register that uses optically-addressed $171$Yb$+$ ion qudits in a linear trap. The rich level structure of $171$Yb$+$ ions allows using the Zeeman sublevels of the quadrupole clock transition at 435.5 nm for efficient and robust qudit encoding.
  arXiv  Detail & Related papers  (2022-10-17T14:13:57Z)
• 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)
• Halving the cost of quantum multiplexed rotations [0.0]
  We improve the number of $T$ gates needed for a $b$-bit approximation of a multiplexed quantum gate with $c$ controls. Our results roughly halve the cost of state-of-art electronic structure simulations based on qubitization of double-factorized or tensor-hypercontracted representations.
  arXiv  Detail & Related papers  (2021-10-26T06:49:44Z)
• Realization of arbitrary doubly-controlled quantum phase gates [62.997667081978825]
  We introduce a high-fidelity gate set inspired by a proposal for near-term quantum advantage in optimization problems. By orchestrating coherent, multi-level control over three transmon qutrits, we synthesize a family of deterministic, continuous-angle quantum phase gates acting in the natural three-qubit computational basis.
  arXiv  Detail & Related papers  (2021-08-03T17:49:09Z)
• Realizing coherently convertible dual-type qubits with the same ion species [0.2097227075698253]
  We implement two coherently-convertible qubit types using the same ion species. We encode the qubits into two pairs of clock states of the 171Yb+ ions, and achieve fast and high-fidelity conversion between the two types using narrow-band lasers. Our work showcases the feasibility and advantages of using coherently convertible dual-type qubits with the same ion species for future large-scale quantum computing and networking.
  arXiv  Detail & Related papers  (2021-06-28T18:00:08Z)
• Demonstration of an All-Microwave Controlled-Phase Gate between Far Detuned Qubits [0.0]
  We present an all-microwave controlled-phase gate between two transversely coupled transmon qubits. Our gate constitutes a promising alternative to present two-qubit gates and could have hardware scaling advantages in large-scale quantum processors.
  arXiv  Detail & Related papers  (2020-06-18T16:08:19Z)

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.