Materials for quantum technologies: Computing, information, and sensing

Law, Stephanie; Kokkelmans, Sjjmf Servaas

doi:10.1063/5.0050140

Cited by 3 publications

(3 citation statements)

References 15 publications

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“…[56], which also describes the physical conditions for the absence, in the Hamiltonian, of the terms representing Rayleigh scattering, Stark shifts, and onephoton interactions of the atom with both field modes. In Equation (2), the atomic state and its variations are described by the ½ pseudospin operators S z (such that S z |±⟩ = ± 1 2 |±⟩) and S ± (S ± |∓⟩ = |±⟩, S ± |±⟩ = 0). a 𝜇 and a † 𝜇 are the photon annihilation and creation operators for mode 𝜇 (𝜇 = 1, 2), which fulfill the bosonic commutation rule [a 𝜇 , a † 𝜇 ] = 1. n𝜇 = a † 𝜇 a 𝜇 is the operator associated with the photon number in mode 𝜇.…”

Section: Hamiltonian Model Of the System And Initial Conditionsmentioning

confidence: 99%

“…The considerable progress in quantum technologies over the past two decades [1,2] has escalated the interest for engineering quantum entangled states of radiation-matter systems, which can be employed for innovative and revolutionary applications in quantum metrology, [3][4][5][6][7][8][9] sensing, [10][11][12] and imaging/printing (including quantum optical lithography), [13][14][15][16][17] computing, [1,2,[18][19][20][21] information processing, [20,21] and communication. [19,22] One of the major problems encountered in the development of these quantum-enhanced technologies is the fragility of the required entangled states, due to the coupling with the environment and related noise.…”

Section: Introductionmentioning

confidence: 99%

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Quantum Optics Parity Effect on Generalized NOON States and Its Implications for Quantum Metrology

Migliore

Messina

2022

Annalen der Physik

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NOON states are entangled states of great interest in the development of quantum technologies, because they enable high‐precision phase measurements in interferometric schemes relevant to quantum metrology and sensing. This study shows that two degenerate modes of a cavity field coupled to an atom or molecule that can be modeled as a two‐level system through two‐photon interactions, initially prepared in a (generalized) NOON state, experience a dynamical evolution that distinctly depends on the parity of the photon number. When the total photon number is even, the system dynamics is characterized by a time range in which the state of the system evolves near maximally entangled states that may be fed to an optical interferometer to make phase measurements essentially at the Heisenberg limit. Such entangled states cannot be achieved for odd photon numbers instead. The parity effect thus emerges as a potential control factor in quantum metrology, sensing, and lithography.

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Section: Hamiltonian Model Of the System And Initial Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quantum Optics Parity Effect on Generalized NOON States and Its Implications for Quantum Metrology

Migliore

Messina

2022

Annalen der Physik

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“…Regardless of platform, there is a common type of noise that is prevalent and associated with the material itself or interfaces between materials in most solid-state quantum hardware platforms [ 31 , 32 , 33 ]. To overcome material-inherent noise to realize large-scale, fault-tolerant quantum hardware, there is still a lot of work to be done to improve the multifaceted aspects of materials through design, purification, and fabrication methods, despite the maturity of dominant material systems of quantum technologiess have reached through many decades of research and development.…”

Section: Introductionmentioning

confidence: 99%

Material-Inherent Noise Sources in Quantum Information Architecture

Yang

Kim

2023

Materials

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NISQ is a representative keyword at present as an acronym for “noisy intermediate-scale quantum”, which identifies the current era of quantum information processing (QIP) technologies. QIP science and technologies aim to accomplish unprecedented performance in computation, communications, simulations, and sensing by exploiting the infinite capacity of parallelism, coherence, and entanglement as governing quantum mechanical principles. For the last several decades, quantum computing has reached to the technology readiness level 5, where components are integrated to build mid-sized commercial products. While this is a celebrated and triumphant achievement, we are still a great distance away from quantum-superior, fault-tolerant architecture. To reach this goal, we need to harness technologies that recognize undesirable factors to lower fidelity and induce errors from various sources of noise with controllable correction capabilities. This review surveys noisy processes arising from materials upon which several quantum architectures have been constructed, and it summarizes leading research activities in searching for origins of noise and noise reduction methods to build advanced, large-scale quantum technologies in the near future.

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