Fast generations of entangled states between a transmon qubit and microwave photons via shortcuts to adiabaticity

Yan, Ran; Feng, Zhi‐Bo; Zhang, Chunli; Li, M; Lu, Xiao-Jing; Zhou, Yan

doi:10.1088/1612-202x/aae5ac

Cited by 5 publications

(5 citation statements)

References 49 publications

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“…By utilizing the designed resonant driving, the transfer duration time is only 40 ns, which is much shorter than that mentioned in [38] based on the technique of STA. Here the rapid generation of the entanglement state benefits from the resonant interactions.…”

Section: Fast-generating Entanglement State Via Resonant Drivingmentioning

confidence: 93%

“…Compared with the microwave driving required by the technique of STA (especially for invariant-based STA) [36], the present driving is easily controlled for the practical tasks, which is beneficial to enhance operation fidelity. (ii) Entanglement generation via resonant driving can be implemented rapidly, and is much faster than the method mentioned in [38]. The faster operation speed is helpful in reducing the decoherence effects caused by noisy environments; meanwhile, the number of quantum operations can be increased within a given decoherence time.…”

Section: Fast-generating Entanglement State Between a Transmon Qubit ...mentioning

confidence: 99%

“…Based on the standard dissipation theory, we are now concerned with the decoherence and decay effects on the considered entanglement generation in the resonant case. After tracing over the environment degrees of freedom, the reduced density matrix of the composite system is ρ, the dynamical evolution of which can be characterized by the Lindblad-type master equation [36,38],…”

Section: High Robustness and Potential Scalabilitymentioning

confidence: 99%

“…Here κ stands for the decay rate of the cavity photon, γ (kl) and γ (kl) ϕ are the relaxation and dephasing rates between level states |k and |l , respectively. The inversion operators are defined as σ To numerically quantify the decoherence effects on the quantum operation, we adopt the fidelity as mentioned in [33,36,38]…”

Section: High Robustness and Potential Scalabilitymentioning

confidence: 99%

See 3 more Smart Citations

Fast-generating entanglement state between a transmon qubit and cavity photons via resonant driving

Shao¹,

Yan²,

Feng³

et al. 2019

Laser Phys.

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Fast generation of entanglement states is of critical importance for robust quantum information processing. In this paper, we propose an efficient protocol for a rapidly generating entanglement state between a transmon qubit and microwave photons. The transmon system is coupled to a classical microwave driving and a quantized cavity mode. With the adjustable classical driving, we consider the entanglement creation by transferring the composite states via resonant driving. Compared with the non-resonant cases, the present operation can be accomplished in a shorter time, which thus contributes to mitigating the decoherence effects. Moreover, many transmons inside a common cavity field could be addressed in a scalable way. The proposed strategy could offer a promising approach to optimally prepare entanglement states with superconducting quantum systems.

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Section: Fast-generating Entanglement State Via Resonant Drivingmentioning

confidence: 93%

Section: Fast-generating Entanglement State Between a Transmon Qubit ...mentioning

confidence: 99%

Section: High Robustness and Potential Scalabilitymentioning

confidence: 99%

Section: High Robustness and Potential Scalabilitymentioning

confidence: 99%

See 2 more Smart Citations

Fast-generating entanglement state between a transmon qubit and cavity photons via resonant driving

Shao¹,

Yan²,

Feng³

et al. 2019

Laser Phys.

View full text Add to dashboard Cite

show abstract

“…Green-Horne-Zeilinger (GHZ) states [7] are a typical type of maximally entangled states, and the generation of which have been paid much attention recently [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Conventional way of GHZ states is generated in a step by step way, based on high-fidelity quantum gates.…”

Section: Introductionmentioning

confidence: 99%

Single-step multipartite entangled states generation from coupled circuit cavities

Xue

2019

Front. Phys.

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Green-Horne-Zeilinger states are a typical type of multipartite entangled states, which plays a central role in quantum information processing. For the generation of multipartite entangled states, the single-step method is more preferable as the needed time will not increase with the increasing of the qubit number. However, this scenario has a strict requirement that all the two-qubit interaction strengths should be the same, or the generated state will be of low quality. Here, we propose a scheme for generating multipartite entangled states of superconducting qubits, from a coupled circuit cavities scenario, where we rigorously achieve the requirement via adding an extra z-direction ac classical field for each qubit, leading the individual qubit-cavity coupling strength to be tunable in a wide range, and thus can be tuned to the same value. Meanwhile, in order to obtain our wanted multi-qubits interaction, x-direction ac classical field for each qubit is also introduced. By selecting the appropriate parameters, we numerically shown that high-fidelity multi-qubit GHZ states can be generated. In addition, we also show that the coupled cavities scenario is better than a single cavity case. Therefore, our proposal represents a promising alternative for multipartite entangled states generation.

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Speeding up the Generation of Entangled State between a Superconducting Qubit and Cavity Photons via Counterdiabatic Driving

Yan

Feng

et al. 2020

Annalen der Physik

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Optimal generation of entangled states is of critical significance for robust quantum information processing. An effective scheme is presented for speeding up the generation of an entangled state between a superconducting qubit and microwave photons via counterdiabatic driving. At a magic bias point, the first three levels of a charge-phase quantum circuit constitute an effective qutrit. An entangled state based on adiabatic population transfer is first achieved. By the technique of shortcuts to adiabaticity, a counterdiabatic driving is applied to the qutrit, which then accelerates the entanglement generation significantly. Moreover, with the accessible decoherence rates, the rapid operations in a shortcut way are highly robust when compared with adiabatic manipulations. The scheme could offer a promising approach toward optimal preparation of entangled states with superconducting artificial atoms in circuit quantum electrodynamics, experimentally.

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Fast generations of entangled states between a transmon qubit and microwave photons via shortcuts to adiabaticity

Cited by 5 publications

References 49 publications

Fast-generating entanglement state between a transmon qubit and cavity photons via resonant driving

Fast-generating entanglement state between a transmon qubit and cavity photons via resonant driving

Single-step multipartite entangled states generation from coupled circuit cavities

Speeding up the Generation of Entangled State between a Superconducting Qubit and Cavity Photons via Counterdiabatic Driving

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