<i>omg</i> blueprint for trapped ion quantum computing with metastable states

Allcock, D. T. C.; Campbell, W. C.; Chiaverini, John; Chuang, Isaac L.; Hudson, Eric R.; Moore, I. D.; Ransford, Anthony; Roman, Conrad; Sage, Jeremy

doi:10.1063/5.0069544

Cited by 33 publications

(18 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The platform discussed in this work, with the "computational" qubit coupled to a Rydberg state and the "auxiliary" qubit that can be utilized for measurement [7,17,29,30] and remote entanglement [31], holds promise for programmable entanglement in atomic clocks [44][45][46], quantum networking [31,43], and quantum computation [38][39][40]42]. A similar omg architecture has recently been proposed [28] and demonstrated [61] for trapped ions, where the additional required primitive operations are already compatible with existing large-scale systems. We believe the same is true for the neutral AEAbased platform [13][14][15][17][18][19].…”

Section: Discussionmentioning

confidence: 99%

“…Such access to multiple highly coherent qubit types within a single atom may obviate the need for heterogeneous qubit architectures, which have become ubiquitous in myriad quantum science platforms [23][24][25][26][27]. We extend the term omg ("optical, metastable, and ground") from a recent trapped ion proposal [28] to describe neutral fermionic AEAs in this context.…”

Section: Introductionmentioning

confidence: 99%

“…The optical qubit is used for atomic clocks [20], among other novel applications [32][33][34]. These nuclear qubits can be manipulated by stimulated Raman transitions via other states [17,18], as is common for hyperfine qubits in neutral alkali atoms [35] and trapped ions [28].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Chen,

Li,

Huie

et al. 2022

Preprint

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Chen,

Li,

Huie

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…This is commonly used as the upper level of optical atomic clocks [38], and is metastable with a lifetime of τ ≈ 20 s. We define the qubit states as |1 ≡ |m F = 1/2 and |0 ≡ |m F = −1/2 . Protocols for state preparation, measurement and single qubit rotations are presented in the supplementary information [39], and we note that encoding the qubit in a metastable state confers other advantages for these operations, some of which have previously been discussed in the context of trapped ions [40]. To perform two-qubit gates, the state |1 is coupled to a Rydberg state |r with Rabi frequency Ω.…”

Section: Erasure Conversion In 171 Yb Qubitsmentioning

confidence: 99%

Erasure conversion for fault-tolerant quantum computing in alkaline earth Rydberg atom arrays

Wu,

Kolkowitz,

Puri

et al. 2022

Preprint

View full text Add to dashboard Cite

Executing quantum algorithms on error-corrected logical qubits is a critical step for scalable quantum computing, but the requisite numbers of qubits and physical error rates are demanding for current experimental hardware. Recently, the development of error correcting codes tailored to particular physical noise models has helped relax these requirements. In this work, we propose a qubit encoding and gate protocol for 171 Yb neutral atom qubits that converts the dominant physical errors into erasures, that is, errors in known locations. The key idea is to encode qubits in a metastable electronic level, such that gate errors predominantly result in transitions to disjoint subspaces whose populations can be continuously monitored via fluorescence. We estimate that 98% of errors can be converted into erasures. We quantify the benefit of this approach via circuit-level simulations of the surface code, finding a threshold increase from 0.937% to 4.15%. We also observe a larger code distance near the threshold, leading to a faster decrease in the logical error rate for the same number of physical qubits, which is important for near-term implementations. Erasure conversion should benefit any error correcting code, and may also be applied to design new gates and encodings in other qubit platforms.

show abstract

“…Moreover, it enables a wider range of interactions, relevant for applications such as quantum simulation [30,31]. Another important consideration is the applicability of a given scheme to a variety of qubit encodings, for example in the 'omg'-type architecture which requires control of optical, metastable, and ground state qubits [32,33]. Finally, the wavelengths of the required fields also form an important practical criterion.…”

mentioning

confidence: 99%

Synthesizing a $\hatσ_z$ spin-dependent force for optical, metastable, and ground state trapped-ion qubits

O.¹,

S.²,

Minder³

et al. 2022

Preprint

View full text Add to dashboard Cite

A single bichromatic field near-resonant to a qubit transition is typically used for σx or σy Mølmer-Sørensen type interactions in trapped ion systems. Using this field configuration, we present a novel scheme to synthesize a σz spin-dependent force instead; this basis change merely requires adjusting the beat-note frequency of the bichromatic field. We implement this scheme with a laser near-resonant to a quadrupole transition in 88 Sr + . We characterise its robustness to optical phase and qubit frequency offsets and demonstrate its versatility by entangling optical, metastable, and ground state qubits.Trapped ion systems are used for quantum computation [1-3], quantum simulation [4], metrology, and sensing [5,6]. These applications typically require coupling of the internal spin states of the ions to their shared motion via a spindependent force (SDF) [7]. These SDFs can arise from the intensity gradient of applied lasers, or from magnetic field gradients [3,[8][9][10][11]. The basis of the SDF, the specific Pauli spin-operator that it corresponds to, depends on its particular physical implementation. For example, time-varying ac Stark shifts can be used to implement σz -type interactions [12][13][14], while a bichromatic field near-resonant to the qubit transition can be used to implement σx or σy Mølmer-Sørensen (MS) type interactions [15][16][17][18][19]. The basis of the SDF determines the fields required, the applicability of the interaction to different qubit types, and its sensitivity to errors.

show abstract

omg blueprint for trapped ion quantum computing with metastable states

Cited by 33 publications

References 28 publications

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

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

Erasure conversion for fault-tolerant quantum computing in alkaline earth Rydberg atom arrays

Synthesizing a $\hatσ_z$ spin-dependent force for optical, metastable, and ground state trapped-ion qubits

Contact Info

Product

Resources

About