Rydberg quantum computation with nuclear spins in two-electron neutral atoms

Shi, Xiaofeng

doi:10.1007/s11467-021-1069-6

Cited by 15 publications

(9 citation statements)

References 127 publications

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“…Nevertheless, larger-I isotopes offer unique opportunities for SU (N ) physics [32,40] and higher-dimensional computational spaces such as qudecimals [59] that could be leveraged for robust encoding [60]. In terms of the structure of Sseries Rydberg states for isotopes with I > 1/2, we expect a similar behavior where the 3 S 1 F max = 1 + I is well-behaved since it is a unique configuration of electron and nuclear spins [47,[49][50][51].…”

Section: Discussionmentioning

confidence: 93%

“…Inspired by recent work [12,14,16], we consider Rydberg-mediated entanglement via the 3 P 0 ↔ 3 S 1 transition, where the latter has a principal quantum number of n ≈ 60 [see Fig 1(a)]. However, we note that a twophoton transition from the 1 S 0 ground state could be used instead [10,15,19,47] at the expense of higher optical power and additional complexity, and was recently used to perform two-qubit gates on the nuclear spin qubit in the ground state of 171 Yb at low field (≈ 4 G) [19]. We consider two-qubit gate operations with qubits defined by any combination of {↓ a , ↑ a , ↓ c , ↑ c }.…”

Section: The Rydberg Transitionmentioning

confidence: 99%

“…The nuclear spins present a unique challenge due to their relatively small energy splittings (≈ kHz/G). Hence, the development of a highfidelity two-or mutli-qubit gate protocol for fermionic AEAs will require a detailed understanding of the Rydberg level structure [19,47,[49][50][51]. We use multichannel quantum defect theory [52] (see Appendix A) to gain new insight on this structure.…”

Section: The Rydberg Transitionmentioning

confidence: 99%

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Analyzing the Rydberg-based omg architecture for $^{171}$Yb nuclear spins

Chen,

Li,

Huie

et al. 2022

Preprint

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Neutral alkaline earth(-like) atoms have recently been employed in atomic arrays with individual readout, control, and high-fidelity Rydberg-mediated entanglement. This emerging platform offers a wide range of new quantum science applications that leverage the unique properties of such atoms: ultra-narrow optical "clock" transitions and isolated nuclear spins. Specifically, these properties offer an optical qubit (o) as well as ground (g) and metastable (m) nuclear spin qubits, all within a single atom. We consider experimentally realistic control of this omg architecture and its coupling to Rydberg states for entanglement generation, focusing specifically on ytterbium-171 ( 171 Yb) with nuclear spin I = 1/2. We analyze the S-series Rydberg states of 171 Yb, described by the three spin-1/2 constituents (two electrons and the nucleus). We confirm that the F = 3/2 manifold -a unique spin configuration -is well suited for entangling nuclear spin qubits. Further, we analyze the F = 1/2 series -described by two overlapping spin configurations -using a multichannel quantum defect theory. We study the multilevel dynamics of the nuclear spin states when driving the clock or Rydberg transition with Rabi frequency Ωc = 2π×200 kHz or ΩR = 2π×6 MHz, respectively, finding that a modest magnetic field (≈ 200 G) and feasible laser polarization intensity purity ( 0.99) are sufficient for gate fidelities exceeding 0.99.

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Section: Discussionmentioning

confidence: 93%

Section: The Rydberg Transitionmentioning

confidence: 99%

Section: The Rydberg Transitionmentioning

confidence: 99%

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Analyzing the Rydberg-based omg architecture for $^{171}$Yb nuclear spins

Chen,

Li,

Huie

et al. 2022

Preprint

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“…A prominent example is the Rydberg blockade. Benefitting from the significant suppression of the simultaneous excitation for Rydberg atoms, it serves as the backbone not only for a two‐qubit controlled‐phase gate, 1,11,12 but also for quantum entanglement, 13‐17 quantum computation, 18,19 quantum algorithms, 20 quantum simulators, 4 and quantum repeaters 21 . On the other hands, as an opposite effect, the Rydberg antiblockade 22,23 also sheds new light on fundamental questions about quantum logic gate, 24‐27 quantum entanglement, 28‐32 and directional quantum state transfer 33 .…”

Section: Introductionmentioning

confidence: 99%

Dissipative engineering of a tripartite Greenberger–Horne–Zeilinger state for neutral atoms

Chong

Shao

2021

Quantum Engineering

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The multipartite Greenberger–Horne–Zeilinger (GHZ) states are indispensable elements for various quantum information processing tasks. Here we put forward two deterministic proposals to dissipatively prepare tripartite GHZ states in a neutral atom system. The first scheme utilizes the polychromatic driving fields and the engineered spontaneous emission of Rydberg states to generate a tripartite GHZ state with a high efficiency, which is then optimized by introducing the Gaussian soft control pulse. In the second scenario, we exploit the natural spontaneous emission of the Rydberg states as a resource, thence a steady tripartite GHZ state with fidelity around 98% can be obtained by simultaneously integrating the switching driving of unconventional Rydberg pumping and the Rydberg antiblockade effect.

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“…To date, many NHQC+ schemes have been put forward in different physical systems, for example, superconducting circuit [28][29][30], spin qubits [31,32], and Rydberg atoms [33][34][35][36]. The Rydberg atom system is one promising candidate platform for physical implementation of quantum computing due to its long coherence time and strong interatomic interaction [37][38][39][40][41][42][43][44][45][46][47][48][49][50][51]. In Rydberg atom systems, the most representative phenomenon is Rydberg blockade [52,53].…”

Section: Introductionmentioning

confidence: 99%

Optimized nonadiabatic holonomic quantum computation based on Förster resonance in Rydberg atoms

Liu¹,

Shen²,

Zheng³

et al. 2021

Preprint

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In this paper, we propose a scheme for implementing the nonadiabatic holonomic quantum computation (NHQC+) of two Rydberg atoms by using invariant-based reverse engineering (IBRE). The scheme is based on Förster resonance induced by strong dipole-dipole interaction between two Rydberg atoms, which provides a selective coupling mechanism to simply the dynamics of system. Moreover, for improving the fidelity of the scheme, the optimal control method is introduced to enhance the gate robustness against systematic errors. Numerical simulations show the scheme is robust against the random noise in control fields, the deviation of dipole-dipole interaction, the Förster defect, and the spontaneous emission of atoms. Therefore, the scheme may provide some useful perspectives for the realization of quantum computation with Rydberg atoms.

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Rydberg quantum computation with nuclear spins in two-electron neutral atoms

Cited by 15 publications

References 127 publications

Analyzing the Rydberg-based omg architecture for $^{171}$Yb nuclear spins

Analyzing the Rydberg-based omg architecture for $^{171}$Yb nuclear spins

Dissipative engineering of a tripartite Greenberger–Horne–Zeilinger state for neutral atoms

Optimized nonadiabatic holonomic quantum computation based on Förster resonance in Rydberg atoms

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