Non-Markovian entanglement transfer to distant atoms in a coupled superconducting resonator*

Mu, Qing-Xia; Lin, Peiying

doi:10.1088/1674-1056/ab84d8

Cited by 7 publications

(9 citation statements)

References 45 publications

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“…In detail, we would like to mention that in this case, in our calculation for concurrence C BC considering the initial mixed state, two of the eigenvalues for the related matrix are the same. Thus, based on the concurrence relation (15), we achieve C BC = 0, meaning that the qubits B and C are always separable. Furthermore, to deter-mine our calculations, we re-investigate the entanglement of the two qubits B and C when they are initially prepared in a mixed state via the negativity measure and we have obtained the same conclusion with concurrence.…”

Section: The Concurrence For the Initial Mixed Statementioning

confidence: 99%

“…The quantum Fisher information flow may be employed for distinguishing the Markovian and non-Markovian processes. [10,11] Moreover, in particular, the entanglement revives in the non-Markovian regime [9,[12][13][14][15] and reduced exponentially in the Markovian regime. [16][17][18] In fact, even though Markovian dynamics includes a level of back reaction, it neglects the entanglement that arises between bodies and bath modes during the evolution.…”

Section: Introductionmentioning

confidence: 99%

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Dissipative dynamics of an entangled three-qubit system via non-Hermitian Hamiltonian: Its correspondence with Markovian and non-Markovian regimes

Rastegarzadeh¹,

Tavassoly²

2021

Chinese Phys. B

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We investigate an entangled three-qubit system in which only one of the qubits experiences the decoherence effect by considering a non-Hermitian Hamiltonian, while the other two qubits are isolated, i.e., do not interact with environment, directly. Then, the time evolution of the density matrix (for the pure as well as mixed initial density matrix) and the corresponding reduced density matrices are obtained, by which we are able to utilize the dissipative non-Hermitian Hamiltonian model with Markovian and non-Markovian regimes via adjusting the strange of the non-Hermitian term of the total Hamiltonian of the under-considered system.

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Section: The Concurrence For the Initial Mixed Statementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dissipative dynamics of an entangled three-qubit system via non-Hermitian Hamiltonian: Its correspondence with Markovian and non-Markovian regimes

Rastegarzadeh¹,

Tavassoly²

2021

Chinese Phys. B

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show abstract

“…For example, the memory and feedback effect of non-Markovian reservoirs can reduce the decay of entanglement and enhance the entanglement revival. [27][28][29] The authors in refs. [30][31][32] found that the initial entanglement between the two qubits can be preserved by using the additional qubits.…”

Section: Introductionmentioning

confidence: 99%

Entanglement Dynamics of Two V‐type Atoms with Dipole–Dipole Interaction in Dissipative Cavity

et al. 2023

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In this work, a coupled system of two V-type atoms with dipole-dipole interaction in a dissipative single-mode cavity, which couples with an external environment, is studied. The analytical solution of this model is obtained by solving the time dependent Schrodinger equation after Hamiltonian of dissipative cavity is diagonalized by introducing a set of new creation and annihilation operators according to Fano theorem. It is also discussed in detail how the entanglement dynamics of different initial states are influenced by the cavity-environment coupling, the spontaneously generated interference (SGI) parameter, and the dipole-dipole interaction between two atoms . The results show that the SGI parameter has different effects on entanglement dynamics under different initial states. Namely, the SGI parameter will increase the decay rate of the initially maximal entangled state and reduce that of the initially partial entangled state. For the initially product state, the larger SGI parameter corresponds to the more entanglement generated. The entanglement monotonically decreases under the weak cavity-environment coupling, while the oscillation of entanglement will occur under the strong cavity-environment coupling. The larger the dipole-dipole interaction is, the slower the entanglement decays and the more the entanglement will be generated. So the dipole-dipole interaction can not only protect and generate entanglement very effectively, but also enhance the regulation effect of the SGI parameter on entanglement.

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“…It holds great physical significance in various functions such as quantum invisible state transfer, quantum key distribution, and quantum dense coding. The coherent state is a continuous variable state closest to the classical light field and photons exhibits a Poisson distribution [1][2][3]. Futhermore, the amplitude and phase defined by the coherent state also satisfy the Heisenberg's uncertainty principle.…”

Section: Introductionmentioning

confidence: 99%

Generation of entangled coherent states in cavity QED and its nonclassicality

Hua,

Tang

2023

Quantum and Nonlinear Optics X

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Cavity quantum electrodynamics is the intersection of quantum physics and microcavity optics research. In this paper, we presented a two-mode cavity coupled to a classical field driven by N three-level atoms to prepare entangled coherent states based on cavity QED. In this scheme, we adopt the interaction between the three-level atoms and the two-mode optical cavity, The initial state of one optical field is an odd-even coherent state, while the initial state of another optical field is a coherent state. After considering the time evolution of the initial states with the system, we obtained the specific form of the time evolution of the quantum states and prepared the entangled coherent state successfully. We discussed and analysed some of the nonclassical properties of the optical field and quantum states, including the second-order correlation function and the Wigner function. The results show that when calculating the second-order correlation function, the photons are found to exhibit a sub-Poisson distribution at some points in time. In addition, when observing the Wigner function of the quantum states evolving with time, it is found that there is a negative part of the Wigner distribution at some moments, which implies that the quantum state exhibits nonclassical properties at these certain moments.

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Non-Markovian entanglement transfer to distant atoms in a coupled superconducting resonator*

Cited by 7 publications

References 45 publications

Dissipative dynamics of an entangled three-qubit system via non-Hermitian Hamiltonian: Its correspondence with Markovian and non-Markovian regimes

Dissipative dynamics of an entangled three-qubit system via non-Hermitian Hamiltonian: Its correspondence with Markovian and non-Markovian regimes

Entanglement Dynamics of Two V‐type Atoms with Dipole–Dipole Interaction in Dissipative Cavity

Generation of entangled coherent states in cavity QED and its nonclassicality

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