Realizing coherently convertible dual-type qubits with the same ion species

Yang, H. -X.; Ma, J. -Y.; Wu, Y. -K.; Wang, Y.; Cao, M. -M.; Guo, W. -X.; Huang, Y. -Y.; Feng, L.; Zhou, Z. -C.; Duan, L. -M.

doi:10.48550/arxiv.2106.14906

Cited by 4 publications

(7 citation statements)

References 27 publications

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“…As the simulated results further reveal, the fidelity of the final singlet state keeps a relatively high value in the decoherence environment. Our CPs scheme provides a selectable way for robust controlling in the error-prone environment and shows an enormous potential application in various physical models, e.g., implementation of coherently convertible dual-type qubits with high fidelity [77].…”

Section: Discussionmentioning

confidence: 99%

“…In above section, we have showed the design process of composite pulses in a general physical system, where the three-level structure can be found in atomic systems [14], trapped ions [59], diamond nitrogenvacancy centers [60], and superconducting circuits [61][62][63][64][65][66], etc. In this section, we demonstrate that the CPs scheme can be also generalized to complicated systems for performing different quantum tasks, e.g., coherent conversion between two qubits [77] or preparation of entangled states [78], etc. The fundamental is to reduce complicated systems to the familiar three-level physical model.…”

Section: Applications: Robust Preparation Of Three-atom Singlet State...mentioning

confidence: 99%

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Composite pulses for high fidelity population transfer in three-level systems

Shi,

Zhang,

Ran

et al. 2022

Preprint

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Section: Discussionmentioning

confidence: 99%

Section: Applications: Robust Preparation Of Three-atom Singlet State...mentioning

confidence: 99%

Composite pulses for high fidelity population transfer in three-level systems

Shi,

Zhang,

Ran

et al. 2022

Preprint

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“…Considering typical metastable state lifetimes (e.g. τ ∼ 60 ms for 2 D 3/2 in Yb + [151], τ ∼ 26 s for 2 D 5/2 in Ba + [152] or τ ∼ 3700 days for 2 F 7/2 in Yb + [153,154]), this error can be made negligible depending on the atomic levels in use. Qubit hiding also allows to use the ions that have been measured for sympathetic recooling to eliminate the heating of the shared motional modes induced by the measurement.…”

Section: Entanglement Transitionmentioning

confidence: 99%

Dissipative Floquet Dynamics: from Steady State to Measurement Induced Criticality in Trapped-ion Chains

Sierant,

Chiriacò,

Surace

et al. 2021

Preprint

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Quantum systems evolving unitarily and subject to quantum measurements exhibit various types of non-equilibrium phase transitions, arising from the competition between unitary evolution and measurements. Dissipative phase transitions in steady states of time-independent Liouvillians and measurement induced phase transitions at the level of quantum trajectories are two primary examples of such transitions. Investigating a many-body spin system subject to periodic resetting measurements, we argue that many-body dissipative Floquet dynamics provides a natural framework to analyze both types of transitions. We show that a dissipative phase transition between a ferromagnetic ordered phase and a paramagnetic disordered phase emerges for long-range systems as a function of measurement probabilities. A measurement induced transition of the entanglement entropy between volume law scaling and area law scaling is also present, and is distinct from the ordering transition. The ferromagnetic phase is lost for short range interactions, while the volume law phase of the entanglement is enhanced. An analysis of multifractal properties of wave function in Hilbert space provides a common perspective on both types of transitions in the system. Our findings are immediately relevant to trapped ion experiments, for which we detail a blueprint proposal based on currently available platforms.

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“…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%

“…This SDF is well suited to manipulate a variety of qubit states. We use the same laser configuration to entangle optical, metastable, and ground state qubits, which is important for recently proposed trapped-ion architectures [32,33]. While demonstrated for field-sensitive transitions (there are no clock qubits in 88 Sr + ), our method could be extended to field-insensitive clock qubits.…”

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

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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

Realizing coherently convertible dual-type qubits with the same ion species

Cited by 4 publications

References 27 publications

Composite pulses for high fidelity population transfer in three-level systems

Composite pulses for high fidelity population transfer in three-level systems

Dissipative Floquet Dynamics: from Steady State to Measurement Induced Criticality in Trapped-ion Chains

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

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