Fast and robust population transfer with a Josephson qutrit via shortcut to adiabaticity

Feng, Zhi‐Bo; Lu, Xiao-Jing; Yan, Ran; Zhao, Zheng‐Yin

doi:10.1038/s41598-018-27697-3

Cited by 18 publications

(17 citation statements)

References 63 publications

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“…Compared with the previous case, [40] the strategy could broaden the avenue to investigate dissipative dynamics with superconducting systems. (iii) In contrast to the method of invariant-based STA, [43] Rabi couplings Ω p,s (behaving as Gaussian functions of time) and the ancillary driving Ω a (having the smooth and continuous waveform) are readily generated in our scenario, which are beneficial to precisely implement quantum operations.…”

Section: Discussionmentioning

confidence: 99%

“…Through two symmetric Josephson junctions (with the identical coupling energies E J and capacitances C J ), the CPB is connected to a segment of a superconducting ring. In the charge-phase regime, [42,43] the characteristic system parameters E J and E c have the same order of magnitude, E J ∼ E c . The CPB is biased by a static bias voltage V d through a gate capacitance C d .…”

Section: A Superconducting Circuit Interacting With Microwave Drivingsmentioning

confidence: 99%

“…The transition matrix element reads t f q 0 = Ω p cos(ω p t), where Ω p denotes the relevant Rabi rate. [43,44] photon resonance interaction is [41]…”

Section: A Superconducting Circuit Interacting With Microwave Drivingsmentioning

confidence: 99%

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Fast population transfer with a superconducting qutrit via non-Hermitian shortcut to adiabaticity

Dong

Feng

et al. 2023

Chinese Phys. B

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Non-Hermitian dissipation dynamics, capable of turning the conventionally detrimental decoherence effects to useful resources for state engineering, is highly attractive to quantum information processing. In this work, an effective scheme is developed for implementing fast population transfer with a superconducting qutrit via the non-Hermitian shortcut to adiabaticity (STA). We first deal with a Λ-configuration interaction between the qutrit and microwave drivings, in which the dephasing-assisted qubit state inversion requiring an overlarge dephasing rate is constructed non-adiabatically. After introducing a feasible ancillary driving that directly acts upon the qubit states, the target state transfer can be well realized but with an accessible qubit dephasing rate. Moreover, a high fidelity could be numerically obtained in the considered system. The strategy could provide a new route towards the non-Hermitian shortcut operations on superconducting quantum circuits.

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Section: Discussionmentioning

confidence: 99%

Section: A Superconducting Circuit Interacting With Microwave Drivingsmentioning

confidence: 99%

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Fast population transfer with a superconducting qutrit via non-Hermitian shortcut to adiabaticity

Dong

Feng

et al. 2023

Chinese Phys. B

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“…On the other hand, from the viewpoint of fast and robust coherent control, the * Author to whom any correspondence should be addressed. mitigation of decoherence effects is highly desirable in the context of quantum information processing [12][13][14][15][16][17][18]. Physically, since the decoherence rate of qubit is fixed in general case, the decoherence effect degrades as the duration time gets reduced.…”

Section: Introductionmentioning

confidence: 99%

Flux-controllable and fast state inversion in a Laudau–Zener system of superconducting charge qubit

Yan¹,

Feng²

2023

Laser Phys.

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Coherent control of quantum systems in an optimized manner is of significance to information processing and state engineering. In this paper, an effective scheme is proposed for implementing rapid state inversion in a Laudau–Zener (LZ) system of superconducting charge qubit. By linearly adjusting time-dependent gate charge, the system with a given tunneling splitting of energy can be described by the LZ model. By means of the applied flux capable of inducing desired level spacing, qubit state inversion with high probability can be performed in a short time. We further address the criterion to ensure system evolution with negligible non-adiabatic excitation. With the accessible decoherence rates, high-fidelity operations can be obtained numerically. Without adding auxiliary driving, the present strategy could perform the shortcut-like accelerated operation, which paves a promising avenue towards optimized information processing with superconducting qubits.

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“…Quantum operation of interest can be completed in a fast way, which significantly mitigates the decoherence effects of noisy environment. [42] Meanwhile, within a given coherence time, the number of high-fidelity quantum operations could be increased considerably.…”

Section: Introductionmentioning

confidence: 99%

Speeding up generation of photon Fock state in a superconducting circuit via counterdiabatic driving*

Dong¹,

Lu²,

Li³

et al. 2021

Chinese Phys. B

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Optimal creation of photon Fock states is of importance for quantum information processing and state engineering. Here an efficient strategy is presented for speeding up generation of photon Fock state in a superconducting circuit via counterdiabatic driving. A transmon qubit is dispersively coupled to a quantized electrical field. We address a Λ-configuration interaction between the composite system and classical drivings. Based on two Gaussian-shaped drivings, a single-photon Fock state can be generated adiabatically. Instead of adding an auxiliary counterdiabatic driving, our concern is to modify these two Rabi drivings in the framework of shortcut to adiabaticity. Thus an accelerated operation with high efficiency can be realized in a much shorter time. Compared with the adiabatic counterpart, the shortcut-based operation is significantly insusceptible to decoherence effects. The scheme could offer a promising way to deterministically prepare photon Fock states with superconducting quantum circuits.

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Fast and robust population transfer with a Josephson qutrit via shortcut to adiabaticity

Cited by 18 publications

References 63 publications

Fast population transfer with a superconducting qutrit via non-Hermitian shortcut to adiabaticity

Fast population transfer with a superconducting qutrit via non-Hermitian shortcut to adiabaticity

Flux-controllable and fast state inversion in a Laudau–Zener system of superconducting charge qubit

Speeding up generation of photon Fock state in a superconducting circuit via counterdiabatic driving*

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