Generation of a Maximally Entangled State Using Collective Optical Pumping

Malinowski, Maciej; Zhang, Chi; Negnevitsky, Vlad; Ivan, Rojkov,; Reiter, Florentin; Nguyen, Thanh-Long; Stadler, M.; Kienzler, Daniel; Mehta, Karan K.; Home, Jonathan

doi:10.1103/physrevlett.128.080503

Cited by 12 publications

(4 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, Kim et al realized the preparation of optical Bell states using Bell state measurement in an optical system [70], Zhang et al investigated the evolution of two qubits, both in the ground state, to Bell states in a superconducting waveguide quantum electrodynamics system driven by an appropriate microwave pulse [71], macrì et al proposed the preparation of qubits in the ultrastrong-coupling circuit QED to realize Bell state preparation [72], and Clark et al realized Bell state preparation in trapped-ion systems [73]. In addition, the realization of Bell state preparation in other quantum systems has been extensively studied [74][75][76][77][78][79][80][81][82][83][84]. Meanwhile, dissipative systems can also realize Bell state preparation [85,86].…”

Section: Introductionmentioning

confidence: 99%

Generating Bell states and Werner states of two qubits via optical field

Jiang,

Zhai,

Song

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

In this paper, we investigate how the evolution of the states of two qubits initially in a direct product state can be controlled by the optical field in a Tavis-Cummings (TC) model. For the two qubits initially in the direct product state, we find that their matrix elements at any moment can be modulated by the coefficients of the optical field initial states in the number state space. We propose a method for preparing an \textit{X}-type state of two qubits. Subsequently, for descriptive convenience, we divide the Bell states of the two qubits into two kinds in the paper. When both qubits are initially in the ground state, we find that the two qubits can be controlled to produce the first type of Bell state by the superposition state optical field that is initially in the next-nearest-neighbor number state and that the production of any of the first type of Bell states can be controlled by controlling the phase between the two next-nearest-neighbor number states. When one of the two qubits is in the ground state, and the other is in the excited state, we can control the two qubits to produce the second type of Bell state by the single-photon number state optical field. Finally, we study the generation of Werner states by controlling two qubits initially, both in the ground state, using an optical field.

show abstract

Section: Introductionmentioning

confidence: 99%

Generating Bell states and Werner states of two qubits via optical field

Jiang,

Zhai,

Song

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…Based on -type atomic levels, the dynamic evolution of the system is characterized by a Markovian master equation, where the coherent evolution is provided by the laser-atom interaction and the dissipation is provided by the controlled spontaneous emission. Employing the periodic pump and dissipation engineering [75][76][77], we achieve deterministic interconversion of the above-entangled states in the Floquet-Lindblad framework by altering the order of coherent driving fields [78][79][80][81][82]. Our protocol offers the following benefits: (i) The interacting Rydberg states are virtually excited during the Rydberg pump process.…”

Section: Introductionmentioning

confidence: 99%

High-Fidelity Interconversion between Greenberger-Horne-Zeilinger and W States through Floquet-Lindblad Engineering in Rydberg Atom Arrays

et al. 2023

View full text Add to dashboard Cite

Greenberger-Horne-Zeilinger and W states feature genuine tripartite entanglement that cannot be converted into each other by local operations and classical communication. Here, we present a dissipative protocol for deterministic interconversion between Greenberger-Horne-Zeilinger and W states of three neutral 87 Rb atoms arranged in an equilateral triangle of a two-dimensional array. With three atomic levels and diagonal van der Waals interactions of Rydberg atoms, the interconversion between tripartite entangled states can be efficiently accomplished in the Floquet-Lindblad framework through the periodic optical pump and dissipation engineering. We evaluate the feasibility of the existing methodology using the experimental parameters accessible to current neutral-atom platforms. We find that our scheme is robust against typical noises, such as laser phase noise and geometric imperfections of the atom array. In addition, our scheme can integrate the Gaussian soft quantum control technique, which further reduces the overall conversion time and increases the resilience to timing errors and interatomic distance fluctuations. The high-fidelity and robust tripartite entanglement interconversion protocol provides a route to save physical resources and enhance the computational efficiency of quantum networks formed by neutral-atom arrays.

show abstract

“…The field achieves quantum information processing tasks by engineering the interaction with an environment. Engineered dissipation can effect a range of tasks, such as state preparation by optical pumping [63][64][65], squeezing [66,67], entanglement generation [68][69][70][71][72][73][74][75][76][77][78], quantum error correction [79,80], and quantum simulation [81][82][83][84]. These can be achieved without the need for a classical measurement apparatus, with improved scaling and robustness compared to unitary approaches [70,85], and at high fidelities [77,78,[86][87][88].…”

Section: Introductionmentioning

confidence: 99%

Nonunitary gate operations by dissipation engineering

Zapusek

Javadi

Reiter

2022

Quantum Sci. Technol.

View full text Add to dashboard Cite

Irreversible logic is at odds with unitary quantum evolution. Emulating such operations by classical measurements can result in disturbances and high resource demands. To overcome these limitations, we propose protocols that harness dissipation to realize the nonunitary evolution required for irreversible gate operations. Using additional excited states subject to decay, we engineer effective decay processes that perform the desired gate operations on the smallest stable Hilbert space. These operate deterministically and in an autonomous fashion, without the need for measurements. We exemplify our approach considering several classical logic operations, such as the OR, NOR, and XOR gates. Towards experimental realization, we discuss a possible implementation in quantum dots. Our study shows that irreversible logic operations can be efficiently performed on realistic quantum systems and that dissipation engineering is an essential tool for obtaining nonunitary evolutions. The proposed operations expand the quantum engineers' toolbox and have promising applications in NISQ algorithms and quantum machine learning.

show abstract

Generation of a Maximally Entangled State Using Collective Optical Pumping

Cited by 12 publications

References 51 publications

Generating Bell states and Werner states of two qubits via optical field

Generating Bell states and Werner states of two qubits via optical field

High-Fidelity Interconversion between Greenberger-Horne-Zeilinger and W States through Floquet-Lindblad Engineering in Rydberg Atom Arrays

Nonunitary gate operations by dissipation engineering

Contact Info

Product

Resources

About