Atom‐Mediated Phonon Blockade and Controlled‐Z Gate in Superconducting Circuit System

Zhao, Chengsong; Peng, Rui; Yang, Zhen; Chao, Shi‐Lei; Li, Chong; Zhou, Ling

doi:10.1002/andp.202100039

Cited by 8 publications

(3 citation statements)

References 69 publications

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“…Our model is based on the classical scheme of the two-level atom pumped by an external time-dependent field [17,34,35]. Such systems serve as a basic framework to illustrate pertinent light phenomena in atomic systems such as the absorption and the fluorescence spectra of light, the coherent control of quantum systems, and other quantum information processes (quantum bits, supraconductor quantum circuits, and squeezing of light) [36,37]. The two-level atom is usually excited from the ground state to an upper state with an external field that has a transition frequency ω so that, ω=ω 2 -ω 1 and ω 1 and ω 2 are, respectively, the frequencies of the atom at states |1 and |2 (See Figure 1).…”

Section: Modelmentioning

confidence: 99%

Exact Solutions of the Bloch Equations to the Asymmetric Hyperbolic Cosine Pulse with Chirped Frequency

Grira

Boutabba²,

Eleuch

2023

Mathematics

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In this research study, we derive the exact solutions of the Bloch equations describing the dynamics of a two-level atom with dephasing. In the two-level atom, a strong laser pump couples a ground state to an upper excited state with a time-dependent Rabi-frequency. The exact solutions are given for the atomic population inversion and the real and imaginary parts of the coherence while the input pulse is an asymmetric hyperbolic cosine form. Additionally, the system is under a chirped detuning. The method of solving the Bloch equations analytically is a very tedious part of the research, and as far as we know, there are few exact solutions available in this field. Hence, our solutions might be of great interest to various research areas, including nuclear magnetic resonance, where analytical solutions to the Bloch equations play a major role in the study of the information on the state of the medium as determined by the NMR signals.

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Section: Modelmentioning

confidence: 99%

Exact Solutions of the Bloch Equations to the Asymmetric Hyperbolic Cosine Pulse with Chirped Frequency

Grira

Boutabba²,

Eleuch

2023

Mathematics

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“…The initial single-phonon blockade (1PB) was achieved in a nanomechanical resonator, which is coupled to a superconducting quantum two-level system for inducing self-interactions of phonons. On this basis, great effort has been made to study other effects such as two-phonon blockade (2PB), equivalent phononinduced tunneling (PIT), and detecting of PB [23][24][25][26][27][28]. Optomechanical systems with second order nonlinearities are considered for photon induced phonon blockade [23,29,30], with potential applications in hybrid photon-phonon quantum networks.…”

Section: Introductionmentioning

confidence: 99%

Nonreciprocal phonon blockade

Yao,

Ali,

2021

Preprint

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Quantum nonreciprocal devices have received extensive attention in recent years because they can be used to realize unidirectional quantum routing and noise isolation. In this work, we show that the shift of resonance frequencies of propagating phonons induced by spin-orbit interactions (SOI) of phonons in a rotating acoustic ring cavity can be used to realize nonreciprocal phonon blockade. When driving the cavity from different directions, nonreciprocal single-, two-phonon blockade and phonon-induced tunneling can take place by varying the parameters of the system to an appropriate value. To realize phonon blockade, the sublevels of the lower orbit branch of the ground state of silicon-vacancy (SiV) color centers in the diamond membrane are employed to induce self-interactions of phonons in the cavity. This work provides a way to achieve acoustic nonreciprocal devices, such as directional acoustic switches and quantum noise isolation, which may help acoustic information network processing.

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“…For instance, much attention is paid to the manipulation of phonons like nonreciprocal phonon transports, [3][4][5] phononic entanglement, [6] and phonon blockade. [7][8][9][10][11][12] Comparing with photons, phonons are more advantageous in solid-state quantum information processing for the relatively short acoustic wavelength and strong couplings with various solid quantum systems. [13][14][15][16][17][18][19][20][21][22] DOI: 10.1002/qute.…”

Section: Introductionmentioning

confidence: 99%

Strong Two‐Phonon Correlations and Bound States in the Continuum in Phononic Waveguides with Embedded SiV Centers

et al. 2021

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Quantum phononic systems have attracted great attention in quantum science and technology. However, it is quite difficult to realize strong phonon-phonon interactions at the few phonon level in phononic systems, since direct interactions between phonons are generally very weak. Here, the phonon transport properties and the phonon-phonon interactions in a 1D phononic waveguide with embedded silicon-vacancy (SiV) centers are studied. The authors show that, mediated by the SiV centers, strong phonon-phonon interactions can be realized due to coherent interferences of the emitting phonon waves with the incident waves. In particular, the embedded color centers can induce an effective attractive or repulsive interaction in space for phonons, corresponding to phonon bunching or antibunching. Besides, it is found that a single SiV center can capture two resonant phonons simultaneously, forming a phononic bound state in the continuum. Comparing with photon-photon interactions in photonic systems, the phonon-phonon interactions are stronger for relatively slower phonon velocity and the strongly correlated phonon properties are promising for constructing various all-phonon quantum devices in quantum information processing.

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Atom‐Mediated Phonon Blockade and Controlled‐Z Gate in Superconducting Circuit System

Cited by 8 publications

References 69 publications

Exact Solutions of the Bloch Equations to the Asymmetric Hyperbolic Cosine Pulse with Chirped Frequency

Exact Solutions of the Bloch Equations to the Asymmetric Hyperbolic Cosine Pulse with Chirped Frequency

Nonreciprocal phonon blockade

Strong Two‐Phonon Correlations and Bound States in the Continuum in Phononic Waveguides with Embedded SiV Centers

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