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学者姓名：陈叶鸿
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Abstract ：
A protocol is proposed for the preparation of high-fidelity entangled cat states with composite pulses. The physical model contains two Kerr-nonlinear resonators and a cavity. By properly designing the parameters, each Kerr-nonlinear resonator is confined in the cat-state subspace and the entangled cat states can be generated efficiently. Composite two-photon drives are introduced with multiple amplitudes and frequencies to improve the fidelity of the entangled cat states in the presence of parameter errors. The performance of the protocol is estimated by taking into account the parametric errors and decoherence. Numerical simulation results show that, the protocol is robustness to timing error, detuning error, and decoherence. It is hoped that the protocol may provide a method for preparing stable entangled cat states.
Keyword ：
circuits QED circuits QED composite pulses composite pulses photonic cat states photonic cat states
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| GB/T 7714 | Gu, Ge-Ge , Li, Dong-Sheng , Chen, Ye-Hong et al. Preparation of High-Fidelity Entangled Cat States with Composite Pulses [J]. | ADVANCED QUANTUM TECHNOLOGIES , 2025 . |
| MLA | Gu, Ge-Ge et al. "Preparation of High-Fidelity Entangled Cat States with Composite Pulses" . | ADVANCED QUANTUM TECHNOLOGIES (2025) . |
| APA | Gu, Ge-Ge , Li, Dong-Sheng , Chen, Ye-Hong , Huang, Bi-Hua , Xia, Yan . Preparation of High-Fidelity Entangled Cat States with Composite Pulses . | ADVANCED QUANTUM TECHNOLOGIES , 2025 . |
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In this paper, we propose a one-step scheme for implementing the nonadiabatic holonomic swap gate with Rydberg atoms. By applying invariant-based reverse engineering to design the effective Hamiltonian of the system, a suitable evolution path for implementing nonadiabatic holonomic quantum computation is found. In addition, the systematic-error-sensitivity nullified optimal control method is considered in the parameter selections, so that the scheme is insensitive to the systematic error of pulses. We also estimate the effects of random noise, the random initial phase of the pulses, the Doppler shift, and decoherence on the scheme. The numerical results show that the scheme exhibits fairly good performance against these negative factors. Finally, we generalize the scheme to realize the non-Clifford swap gates. Therefore, this scheme can provide a feasible framework for implementing high-fidelity and robust swap gates and non-Clifford swap gates with Rydberg atoms. © 2024 American Physical Society.
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| GB/T 7714 | Xiao, Y. , Kang, Y.-H. , Zheng, R.-H. et al. Effective nonadiabatic holonomic swap gate with Rydberg atoms using invariant-based reverse engineering [J]. | Physical Review A , 2024 , 109 (6) . |
| MLA | Xiao, Y. et al. "Effective nonadiabatic holonomic swap gate with Rydberg atoms using invariant-based reverse engineering" . | Physical Review A 109 . 6 (2024) . |
| APA | Xiao, Y. , Kang, Y.-H. , Zheng, R.-H. , Song, J. , Chen, Y.-H. , Xia, Y. . Effective nonadiabatic holonomic swap gate with Rydberg atoms using invariant-based reverse engineering . | Physical Review A , 2024 , 109 (6) . |
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Cat-state qubits formed by photonic cat states have a biased noise channel, i.e., one type of error dominates over all the others. We demonstrate that such biased-noise qubits are also promising for error-tolerant simulations of the quantum Rabi model (and its varieties) by coupling a cat-state qubit to an optical cavity. Using the cat-state qubit can effectively enhance the counterrotating coupling, allowing us to explore several fascinating quantum phenomena relying on the counterrotating interaction. Moreover, another benefit from biased-noise cat qubits is that the two main error channels (frequency and amplitude mismatches) are both exponentially suppressed. Therefore, the simulation protocols are robust against parameter errors of the parametric drive that determines the projection subspace. We analyze three examples: (i) collapse and revivals of quantum states; (ii) hidden symmetry and tunneling dynamics; and (iii) pair-cat-code computation. © 2024 American Physical Society.
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| GB/T 7714 | Chen, Y.-H. , Shi, Z.-C. , Nori, F. et al. Error-Tolerant Amplification and Simulation of the Ultrastrong-Coupling Quantum Rabi Model [J]. | Physical Review Letters , 2024 , 133 (3) . |
| MLA | Chen, Y.-H. et al. "Error-Tolerant Amplification and Simulation of the Ultrastrong-Coupling Quantum Rabi Model" . | Physical Review Letters 133 . 3 (2024) . |
| APA | Chen, Y.-H. , Shi, Z.-C. , Nori, F. , Xia, Y. . Error-Tolerant Amplification and Simulation of the Ultrastrong-Coupling Quantum Rabi Model . | Physical Review Letters , 2024 , 133 (3) . |
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A scheme is proposed for achieving robust population inversion in five-level systems by means of composite pulses. An example of such a system consists of the magnetic sublevels with angular momenta Jg=2$J_g=2$ and Je=2$J_e=2$. Through elaborately constructing the relative phases of pulse pairs, the composite sequences perform well in suppressing the uncorrelated pulse area errors. In particular, the five pulse-pair sequence possesses good robustness and a short evolution time. The composite sequences are further designed to compensate for a single type of pulse area errors to any desired order. This work provides a high-efficiency way for robust quantum state manipulation in five-level systems. This work is devoted to achieving robust population inversion in a five-level quantum system by means of composite pulses. The designed composite sequence can compensate the pulse area errors of the driving fields to any order. The results demonstrate that the proposed method is promising in error-prone environments, a superior technique for high-fidelity quantum computation in multilevel systems. image
Keyword ：
composite pulses composite pulses five-level systems five-level systems quantum state transfer quantum state transfer robust quantum control robust quantum control
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| GB/T 7714 | Wang, Jian-Hui , Shi, Zhi-Cheng , Chen, Ye-Hong et al. Robust Quantum State Manipulation by Composite Pulses in Five-Level Systems [J]. | ADVANCED QUANTUM TECHNOLOGIES , 2024 , 7 (9) . |
| MLA | Wang, Jian-Hui et al. "Robust Quantum State Manipulation by Composite Pulses in Five-Level Systems" . | ADVANCED QUANTUM TECHNOLOGIES 7 . 9 (2024) . |
| APA | Wang, Jian-Hui , Shi, Zhi-Cheng , Chen, Ye-Hong , Song, Jie , Huang, Bi-Hua , Xia, Yan . Robust Quantum State Manipulation by Composite Pulses in Five-Level Systems . | ADVANCED QUANTUM TECHNOLOGIES , 2024 , 7 (9) . |
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The experimental observation of quantum phase transitions predicted by the quantum Rabi model in quantum critical systems is usually challenging due to the lack of signature experimental observables associated with them. Here, we describe a method to identify the dynamical critical phenomenon in the quantum Rabi model consisting of a three-level atom and a cavity at the quantum phase transition. Such a critical phenomenon manifests itself as a sudden change of steady-state output photons in the system driven by two classical fields, when both the atom and the cavity are initially unexcited. The process occurs as the high-frequency pump field is converted into the low-frequency Stokes field and multiple cavity photons in the normal phase, while this conversion cannot occur in the superradiant phase. The sudden change of steady-state output photons is an experimentally accessible measure to probe quantum phase transitions, as it does not require preparing the equilibrium state. Quantum Rabi model as an outstanding model can support superradiant phase transitions, and gets increasing interest in the quantum physics. This work presents an effective method to demonstrate the dynamical critical phenomenon in quantum Rabi model without preparing the Confirmed equilibrium state, i.e., a sudden change of the photon number distribution.
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| GB/T 7714 | Chen, Ye-Hong , Qiu, Yuan , Miranowicz, Adam et al. Sudden change of the photon output field marks phase transitions in the quantum Rabi model [J]. | COMMUNICATIONS PHYSICS , 2024 , 7 (1) . |
| MLA | Chen, Ye-Hong et al. "Sudden change of the photon output field marks phase transitions in the quantum Rabi model" . | COMMUNICATIONS PHYSICS 7 . 1 (2024) . |
| APA | Chen, Ye-Hong , Qiu, Yuan , Miranowicz, Adam , Lambert, Neill , Qin, Wei , Stassi, Roberto et al. Sudden change of the photon output field marks phase transitions in the quantum Rabi model . | COMMUNICATIONS PHYSICS , 2024 , 7 (1) . |
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Abstract ：
Cat-state qubits formed by photonic cat states have a biased noise channel, i.e., one type of error dominates over all the others. We demonstrate that such biased-noise qubits are also promising for error-tolerant simulations of the quantum Rabi model (and its varieties) by coupling a cat-state qubit to an optical cavity. Using the cat-state qubit can effectively enhance the counterrotating coupling, allowing us to explore several fascinating quantum phenomena relying on the counterrotating interaction. Moreover, another benefit from biased-noise cat qubits is that the two main error channels (frequency and amplitude mismatches) are both exponentially suppressed. Therefore, the simulation protocols are robust against parameter errors of the parametric drive that determines the projection subspace. We analyze three examples: (i) collapse and revivals of quantum states; (ii) hidden symmetry and tunneling dynamics; and (iii) pair-cat-code computation.
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| GB/T 7714 | Chen, Ye-Hong , Shi, Zhi-Cheng , Nori, Franco et al. Error-Tolerant Amplification and Simulation of the Ultrastrong-Coupling Quantum Rabi Model [J]. | PHYSICAL REVIEW LETTERS , 2024 , 133 (3) . |
| MLA | Chen, Ye-Hong et al. "Error-Tolerant Amplification and Simulation of the Ultrastrong-Coupling Quantum Rabi Model" . | PHYSICAL REVIEW LETTERS 133 . 3 (2024) . |
| APA | Chen, Ye-Hong , Shi, Zhi-Cheng , Nori, Franco , Xia, Yan . Error-Tolerant Amplification and Simulation of the Ultrastrong-Coupling Quantum Rabi Model . | PHYSICAL REVIEW LETTERS , 2024 , 133 (3) . |
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Abstract ：
In this paper, we propose a one-step scheme for implementing the nonadiabatic holonomic SWAP gate with Rydberg atoms. By applying invariant-based reverse engineering to design the effective Hamiltonian of the system, a suitable evolution path for implementing nonadiabatic holonomic quantum computation is found. In addition, the systematic-error-sensitivity nullified optimal control method is considered in the parameter selections, so that the scheme is insensitive to the systematic error of pulses. We also estimate the effects of random noise, the random initial phase of the pulses, the Doppler shift, and decoherence on the scheme. The numerical results show that the scheme exhibits fairly good performance against these negative factors. Finally, we generalize the scheme to realize the non-Clifford SWAP gates. Therefore, this scheme can provide a feasible framework for implementing high-fidelity and robust SWAP gates and non-Clifford SWAP gates with Rydberg atoms.
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| GB/T 7714 | Xiao, Yang , Kang, Yi-Hao , Zheng, Ri-Hua et al. Effective nonadiabatic holonomic SWAP gate with Rydberg atoms using invariant-based reverse engineering [J]. | PHYSICAL REVIEW A , 2024 , 109 (6) . |
| MLA | Xiao, Yang et al. "Effective nonadiabatic holonomic SWAP gate with Rydberg atoms using invariant-based reverse engineering" . | PHYSICAL REVIEW A 109 . 6 (2024) . |
| APA | Xiao, Yang , Kang, Yi-Hao , Zheng, Ri-Hua , Song, Jie , Chen, Ye-Hong , Xia, Yan . Effective nonadiabatic holonomic SWAP gate with Rydberg atoms using invariant-based reverse engineering . | PHYSICAL REVIEW A , 2024 , 109 (6) . |
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In this paper, a one-step protocol is proposed for the parity measurement of N cat-state qubits which are encoded on the cat states of the modes in superconducting Kerr-nonlinear cavities. The parity measurement is performed with the help of an auxiliary qutrit. Especially, the auxiliary qutrit can (cannot) be excited to the higher-energy levels when the cat-state qubits are in the even- (odd-) parity state. By designing the Rabi frequency of the classical fields via reverse engineering and optimal control, the qutrit is driven to an excited dressed state in the even-parity case, which is robust to the systematic errors of the qutrit-cavity coupling strengths. Accordingly, the parity of the cat-state qubits can be distinguished with high accuracy by measuring the final population of the ground state of the auxiliary qutrit. Numerical simulations also show that the protocol is insensitive to the systematic errors of the classical fields, the inhomogeneity of the coupling strengths, intercavity cross talk, unwanted qutrit transitions, and decoherence. Therefore, the protocol may provide an effective approach for parity measurement of multiple cat-state qubits.
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| GB/T 7714 | Li, Dong-Sheng , Kang, Yi-Hao , Chen, Ye-Hong et al. One-step parity measurement of N cat-state qubits via reverse engineering and optimal control [J]. | PHYSICAL REVIEW A , 2024 , 109 (2) . |
| MLA | Li, Dong-Sheng et al. "One-step parity measurement of N cat-state qubits via reverse engineering and optimal control" . | PHYSICAL REVIEW A 109 . 2 (2024) . |
| APA | Li, Dong-Sheng , Kang, Yi-Hao , Chen, Ye-Hong , Liu, Yang , Zhang, Cheng , Wang, Yu et al. One-step parity measurement of N cat-state qubits via reverse engineering and optimal control . | PHYSICAL REVIEW A , 2024 , 109 (2) . |
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Abstract ：
In this paper, we propose a one-step scheme for implementing the nonadiabatic holonomic SWAP gate with Rydberg atoms. By applying invariant-based reverse engineering to design the effective Hamiltonian of the system, a suitable evolution path for implementing nonadiabatic holonomic quantum computation is found. In addition, the systematic-error-sensitivity nullified optimal control method is considered in the parameter selections, so that the scheme is insensitive to the systematic error of pulses. We also estimate the effects of random noise, the random initial phase of the pulses, the Doppler shift, and decoherence on the scheme. The numerical results show that the scheme exhibits fairly good performance against these negative factors. Finally, we generalize the scheme to realize the non-Clifford SWAP gates. Therefore, this scheme can provide a feasible framework for implementing high-fidelity and robust SWAP gates and non-Clifford SWAP gates with Rydberg atoms.
Cite：
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| GB/T 7714 | Xiao, Yang , Kang, Yi-Hao , Zheng, Ri-Hua et al. Effective nonadiabatic holonomic SWAP gate with Rydberg atoms using invariant-based reverse engineering [J]. | PHYSICAL REVIEW A , 2024 , 109 (6) . |
| MLA | Xiao, Yang et al. "Effective nonadiabatic holonomic SWAP gate with Rydberg atoms using invariant-based reverse engineering" . | PHYSICAL REVIEW A 109 . 6 (2024) . |
| APA | Xiao, Yang , Kang, Yi-Hao , Zheng, Ri-Hua , Song, Jie , Chen, Ye-Hong , Xia, Yan . Effective nonadiabatic holonomic SWAP gate with Rydberg atoms using invariant-based reverse engineering . | PHYSICAL REVIEW A , 2024 , 109 (6) . |
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In this work, we develop a supervised learning model for implementing robust quantum control in composite-pulse systems, where the training parameters can be either phases, detunings, or Rabi frequencies. This model exhibits great resistance to all kinds of systematic errors, including single, multiple, and time-varying errors. We propose a modified gradient descent algorithm for adapting the training of phase parameters, and show that different sampling methods result in different robust performances. In particular, there is a trade-off between high fidelity and robustness for a given number of training parameters, and both can be simultaneously enhanced by increasing the number of training parameters (pulses). For its applications, we demonstrate that the current model can be used for achieving high-fidelity arbitrary superposition states and universal quantum gates in a robust manner. This work provides a highly efficient learning model for fault-tolerant quantum computation by training various physical parameters.
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| GB/T 7714 | Shi, Zhi-Cheng , Ding, Jun -Tong , Chen, Ye-Hong et al. Supervised learning for robust quantum control in composite-pulse systems [J]. | PHYSICAL REVIEW APPLIED , 2024 , 21 (4) . |
| MLA | Shi, Zhi-Cheng et al. "Supervised learning for robust quantum control in composite-pulse systems" . | PHYSICAL REVIEW APPLIED 21 . 4 (2024) . |
| APA | Shi, Zhi-Cheng , Ding, Jun -Tong , Chen, Ye-Hong , Ding, Jun-Tong , Song, Jie , Xia, Yan et al. Supervised learning for robust quantum control in composite-pulse systems . | PHYSICAL REVIEW APPLIED , 2024 , 21 (4) . |
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