Spin-Bath Dynamics in a Quantum Resonator-Qubit System: Effect of a Mechanical Resonator Coupled to a Central Qubit

Dehghani, A.; Mojaveri, B.; Vaez, M.

doi:10.1007/s10773-020-04565-3

Cited by 10 publications

(3 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many experiments and theoretical models have been proposed in order to better understand fundamental aspects of the interaction between radiation and matter, more specifically those associated with macroscopic mechanical systems and electromagnetic fields at the quantum scale. As examples, we cite quantum non-demolition measurements of a mechanical quadrature [6,7], photon antibunching [8], cooling of mechanical modes to their fundamental state [9][10][11][12], optomechanically induced transparency [13], macroscopic quantum superposition in mechanical systems [14][15][16], quantum-coherent coupling of a mechanical oscillator to an optical cavity mode [17], quantum entanglement between electromagnetic fields and a mechanical oscillator [18], and quantum sensors of mechanical motion [19][20][21]. Moreover, optomechanical systems have great potential for practical applications, such as radio-frequency oscillators [22,23], optical memories [13], high sensitivity probes of acceleration [24], and magnetic fields [25].…”

Section: Introductionmentioning

confidence: 99%

Degeneracy and Photon Trapping in a Dissipationless Two-Mode Optomechanical Model

Merici,

De Mattos,

Peixoto De Faria

2024

Entropy

View full text Add to dashboard Cite

In this work, we theoretically study a finite and undamped two-mode optomechanical model consisting of a high quality optical cavity containing a thin, elastic, and dielectric membrane. The main objective is to investigate the precursors of quantum phase transition in such a model by studying the behavior of some observables in the ground state. By controlling the coupling between membrane and modes, we find that the two lowest energy eigenstates become degenerate, as is indicated by the behavior of the mean value of some operators and by other quantifiers as a function of the coupling. Such degenerate states are characterized by a coherent superposition of eigenstates describing one of the two modes preferentially populated and the membrane dislocated from its equilibrium position due the radiation pressure (Schrödinger’s cat states). The delocalization of the compound system photons+membrane results in an increase in fluctuations as measured by Robertson-Schrödinger uncertainty relations.

show abstract

Section: Introductionmentioning

confidence: 99%

Degeneracy and Photon Trapping in a Dissipationless Two-Mode Optomechanical Model

Merici,

De Mattos,

Peixoto De Faria

2024

Entropy

View full text Add to dashboard Cite

show abstract

“…Utilizing electronic, magnetic, or mechanical means [2], investigators can accomplish the efficient and complex manipulation of atoms (molecules), spins, photons, phonons, atomic clusters, and even quantum circuits [3][4][5][6][7][8][9][10]. Especially in the area of quantum information processing (QIP) [11,12], a hybrid quantum system (HQS) is emerging as one of the most reliable schemes owing to it can function the associativity, namely, it can firstly harness the advantages of different subsystems and avoid the local disadvantages induced by some subsystem [13][14][15][16]. Taking a HQS of solid-state spins coupled to the superconducting circuit for example, the solid-state spins can perform the storage function for their long coherence time, the superconducting qubit then plays the role of the information processor because it can be controlled directly and conveniently in a microwave-based circuit, and the superconducting resonator may be considered as the public data bus to connect the solid-state spins and other qubit.…”

Section: Introductionmentioning

confidence: 99%

Robust scheme for high-fidelity generation of mesoscopic entangled cat state

et al. 2023

View full text Add to dashboard Cite

We here study a hybrid quantum system of one solid-state electronic spin coupled to a mechanical resonator (MR) using the crystal strain, with the purpose of engineering the mesoscopic spin-phonon entangled cat state. The feature of this work to be mentioned is that it proposes a different and feasible method to achieve the entanglement, especially with the higher fidelity. This scheme mainly contains two steps, namely the coherent population trapping (CPT) initialization and large-detuning evolution (LDE). By taking all of the adverse decoherence factors into our considerations,the numerical simulations indicate that its fidelity can reach more than 0.995 (or 0.999)when the spin-mechanical coupling strength is 10 (or 100) times larger than spin dephasing and mechanical resonator dissipation rate, respectively. Because of the cooperation of CPT and LDE, this proposal also exhibits a considerable robustness for engineering the entangled cat state, and which may be considered as a general attempt that may be suitable for different systems.

show abstract

“…In turn, much attention has been devoted to describe the dynamics of open quantum systems for different kind of environments, i.e. different sources of damping and decoherence 11 – 14 . It is often challenging to obtain the exact dynamics of an open quantum system and different kinds of approaches have been developed to derive an approximate description at different levels of accuracy.…”

Section: Introductionmentioning

confidence: 99%

Noisy propagation of Gaussian states in optical media with finite bandwidth

Teklu

Bina

Paris

2022

Sci Rep

View full text Add to dashboard Cite

We address propagation and entanglement of Gaussian states in optical media characterised by nontrivial spectral densities. In particular, we consider environments with a finite bandwidth $$J(\omega ) = J_0 \left[ \theta (\omega -\Omega ) - \theta (\omega - \Omega - \delta )\right] $$ J ( ω ) = J 0 θ ( ω - Ω ) - θ ( ω - Ω - δ ) , and show that in the low temperature regime $$T\ll \Omega ^{-1}$$ T ≪ Ω - 1 : (i) secular terms in the master equation may be neglected; (ii) attenuation (damping) is strongly suppressed; (iii) the overall diffusion process may be described as a Gaussian noise channel with variance depending only on the bandwidth. We find several regimes where propagation is not much detrimental and entanglement may be protected form decoherence.

show abstract

Spin-Bath Dynamics in a Quantum Resonator-Qubit System: Effect of a Mechanical Resonator Coupled to a Central Qubit

Cited by 10 publications

References 71 publications

Degeneracy and Photon Trapping in a Dissipationless Two-Mode Optomechanical Model

Degeneracy and Photon Trapping in a Dissipationless Two-Mode Optomechanical Model

Robust scheme for high-fidelity generation of mesoscopic entangled cat state

Noisy propagation of Gaussian states in optical media with finite bandwidth

Contact Info

Product

Resources

About