1Frick Laboratory, Princeton University, Princeton NJ 08544, United States
2Tulane University, New Orleans, LA 70118, United States
3Khoa Vật lý và Thiên văn học, Đại học Macquarie, Sydney, NSW 2109, Úc
4Instituto de Física Enrique Gaviola, CONICET and Universidad Nacional de Córdoba, Ciudad Universitaria, X5016LAE, Córdoba, Argentina
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Tóm tắt
Speeding up the dynamics of a quantum system is of paramount importance for quantum technologies. However, in finite dimensions and without full knowledge of the details of the system, it is easily shown to be $impossible$. In contrast we show that continuous variable systems described by a certain class of quadratic Hamiltonians can be sped up without such detailed knowledge. We call the resultant procedure $textit{Hamiltonian amplification}$ (HA). The HA method relies on the application of local squeezing operations allowing for amplifying even unknown or noisy couplings and frequencies by acting on individual modes. Furthermore, we show how to combine HA with dynamical decoupling to achieve amplified Hamiltonians that are free from environmental noise. Finally, we illustrate a significant reduction in gate times of cavity resonator qubits as one potential use of HA.
Tóm tắt phổ biến
We show that a large class of Hamiltonians quadratic in the position and momentum operators can generically be amplified by local parametric drives without knowing the parameter details of the Hamiltonian. By combining our findings with dynamical decoupling, we achieve a generic speed up of the evolution a quantum system while decoherence coming from the interaction with the environment is suppressed. Even though such amplification does not work for system only composed of qubits, we demonstrate how the implementation of quantum logical gates in hybrid quantum systems can be sped up through the developed amplification scheme
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Trích dẫn
[1] S. C. Burd, R. Srinivas, J. J. Bollinger, A. C. Wilson, D. J. Wineland, D. Leibfried, D. H. Slichter, and D. T. C. Allcock, “Quantum amplification of mechanical oscillator motion”, Khoa học 364 6446, 1163 (2019).
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[3] Hoi-Kwan Lau and Aashish A. Clerk, “High-fidelity bosonic quantum state transfer using imperfect transducers and interference”, npj Thông tin lượng tử 5, 31 (2019).
[4] Wenchao Ge, Brian Sawyer, Joe Britton, Kurt Jacobs, John Bollinger, and Michael Foss-Feig, “Trapped Ion Quantum Information Processing with Squeezed Phonons”, arXiv: 1807.00924.
[5] Wenchao Ge, Brian C. Sawyer, Joseph W. Britton, Kurt Jacobs, Michael Foss-Feig, and John J. Bollinger, “Stroboscopic approach to trapped-ion quantum information processing with squeezed phonons”, Đánh giá vật lý A 100 4, 043417 (2019).
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