Accelerated adiabatic passage in cavity magnomechanics

Qi, Shi-fan; Jing, Jun

doi:10.1103/physreva.105.053710

Cited by 20 publications

(17 citation statements)

References 56 publications

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“…The state-transfer fidelity in the Schrödinger picture can be measured by the time-dependent state population P j (t), j = 1, 2, 3, for the jth magnon mode. To avoid the influence from the local dynamical phases [14], it can be defined by…”

Section: Al] Thus the Hamiltonian Becomesmentioning

confidence: 99%

“…With unique properties such as large tunability, long coherent-time, and strong magnetic dipole-dipole interactions, the magnons can be used as the information carrier in a broad variety of hybrid systems [1][2][3]. Found to be strongly coupled to microwave photon [4][5][6][7][8][9], phonon [10][11][12][13][14], superconducting qubit [15][16][17][18], and spinemitter [19,20], they provide novel applications in quantum computing [21], quantum communication [22], and quantum sensing [23]. The "X-magnon" coupling motivates a number of foundational insights, e.g., the twobody flip-flop interaction of magnons for Rabi oscillation, which is symmetrical to time and parity.…”

Section: Introductionmentioning

confidence: 99%

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Chiral current in Floquet cavity-magnonics

Qi,

Jing

2022

Preprint

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Floquet engineering could induce complex collective behaviour and interesting synthetic gaugefield in quantum many-body systems through temporal modulation of system parameters by periodic drives. Using a Floquet drive on frequencies of the magnon modes, we realize a chiral state-transfer in a hybrid photon-magnon system. The time-reversal symmetry is broken in such a promising platform for coherent information processing. The cavity-photon mode is adiabatically eliminated in the large-detuning regime and the magnon modes under conditional longitudinal drives can be indirectly coupled to each other with a phase-modulated interaction. The effective Hamiltonian is then used to generate chiral currents in a circular loop, whose dynamics is evaluated to measure the symmetry of the system Hamiltonian. Beyond the dynamics in the manifold with a limited number of excitations, our protocol applies to the continuous-variable systems with arbitrary initial states. In addition, it is found to be robust against the systematic errors in the photon-magnon coupling strength and Kerr nonlinearity.

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Section: Al] Thus the Hamiltonian Becomesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chiral current in Floquet cavity-magnonics

Qi,

Jing

2022

Preprint

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“…Lots of protocols have been proposed to achieve an accurate and robust quantum coherent control with ultra-high fidelity, such as resonant pulses [12], adiabatic passages [13][14][15][16][17], shortcuts to adiabaticity (STA) [18][19][20][21][22][23][24][25][26], optimal control theory [27][28][29][30], dressed states driving [31][32][33], composite pulses [34][35][36], and so on. Recently, these protocols have attracted much attention in both theory and experiment [37][38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Coherent control techniques in three-level quantum sensing

Xu¹,

Song²,

Wang³

et al. 2022

Preprint

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Quantum coherent control of a quantum system with high-fidelity is rather important in quantum computation and quantum information processing. There are many control techniques to reach these targets, such as resonant excitation, adiabatic passages, shortcuts to adiabaticity, and so on. However, for a single pulse to realize population transfer, the external tiny error has a trivial influence on the final population. The repeated application of the same pulse will greatly amplify the error effect, making it easy to be detected. Here, we propose to measure small control errors in three-level quantum systems by coherent amplification of their effects, using several coherent control techniques. For the two types of Hamiltonian with SU(2) dynamic symmetry, we analyze how the fidelity of population transfer are affected by Rabi frequencies fluctuation and static detuning deviation, based on the pulse sequence with alternating and same phases, respectively. It is found that the sensitivity of detecting these errors can be effectively amplified by the control pulse sequences. Furthermore, we discuss the efficiency of sensing the two errors with these control techniques by comparing the full width at half maximum of the population profiles. The results provide an accurate and reliable way for sensing the weak error in three-level quantum systems by applying repeatedly the coherent control pulse.

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“…To avoid the influence from the local phases [52] during the whole evolution, the state-transfer fidelity can be measured by the time-dependent state populations…”

Section: Introductionmentioning

confidence: 99%

Floquet generation of magnonic NOON state

Qi¹,

Jing²

2022

Preprint

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We propose a concise and deterministic protocol to generate NOON states in a hybrid system consisting of a superconducting qubit, a circuit resonator mode, and two magnon modes, based on the Floquet engineering. In particular, we construct a time-reversal-symmetry broken Hamiltonian for the chiral state propagation of the three continuous-variable modes depending on the qubit state, by the time modulation over the qubit-resonator interaction and the magnon frequency. Then an arbitrary magnonic NOON state can be generated by a typical preparing-and-measurement procedure. We analysis the robustness of our protocol against the systematic errors in the qubitmagnon coupling strength, the Floquet-driving intensity, and the counter-rotating interactions. We can obtain a high-fidelity NOON state in the presence of the quantum dissipation on all components.

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Accelerated adiabatic passage in cavity magnomechanics

Cited by 20 publications

References 56 publications

Chiral current in Floquet cavity-magnonics

Chiral current in Floquet cavity-magnonics

Coherent control techniques in three-level quantum sensing

Floquet generation of magnonic NOON state

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