Error-Tolerant Amplification and Simulation of the Ultrastrong-Coupling Quantum Rabi Model

Physical Review Letters, Год журнала: 2024, Номер 133(3)

Опубликована: Июль 18, 2024

Cat-state qubits formed by photonic cat states have a biased noise channel, i.e., one type of error dominates over all the others. We demonstrate that such biased-noise are also promising for error-tolerant simulations quantum Rabi model (and its varieties) coupling cat-state qubit to an optical cavity. Using can effectively enhance counterrotating coupling, allowing us explore several fascinating phenomena relying on interaction. Moreover, another benefit from is two main channels (frequency and amplitude mismatches) both exponentially suppressed. Therefore, simulation protocols robust against parameter errors parametric drive determines projection subspace. analyze three examples: (i) collapse revivals states; (ii) hidden symmetry tunneling dynamics; (iii) pair-cat-code computation.

Язык: Английский

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Enhancing tripartite photon-phonon-magnon entanglement by synergizing parametric amplifications

Physical review. A/Physical review, A, Год журнала: 2025, Номер 111(1)

Опубликована: Янв. 9, 2025

Язык: Английский

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Improving quantum metrology protocols with programmable photonic circuits

Nanophotonics, Год журнала: 2025, Номер 14(11), С. 2075 - 2085

Опубликована: Фев. 19, 2025

Abstract Photonic quantum metrology enables the measurement of physical parameters with precision surpassing classical limits by using states light. However, generating providing a large metrological advantage is hard because standard probabilistic methods suffer from low generation rates. Deterministic protocols non-linear interactions offer path to overcome this problem, but they are currently limited errors introduced during interaction time. Thus, finding strategies minimize time these non-linearities still relevant question. In work, we introduce and compare different deterministic based on continuous programmable Jaynes–Cummings Kerr-type interactions, aiming maximize while minimizing We find that provide larger than operations at expense slightly times. show for grows photon number, ones it decreases, favoring scalability big numbers. Finally, also optimize deterministically generated photon-counting homodyne detection.

Язык: Английский

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Heralded nonlocal quantum gates for distributed quantum computation in a decoherence-free subspace

Physical review. A/Physical review, A, Год журнала: 2024, Номер 110(5)

Опубликована: Ноя. 20, 2024

We propose a heralded protocol for implementing nontrivial quantum gates on two stationary qubits coupled to spatially separated cavities. By dynamically controlling the evolution of composite system, nonlocal two-qubit (e.g., cphase and cnot) can be achieved without real excitations either cavity modes or atoms. The success our is conditioned projecting an auxiliary atom onto postselected state, which simultaneously removes various detrimental effects dissipation gate fidelity. In principle, probability approach unity as single-atom cooperativity becomes sufficiently large. Furthermore, we show its application single- within decoherence-free subspace that immune collective dephasing noise. This faithful, heralded, could, therefore, useful distributed computation scalable networks.

Язык: Английский

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Our brains sense the future through a new quantum-like implicit learning mechanism

Brain Research Bulletin, Год журнала: 2024, Номер 216, С. 111048 - 111048

Опубликована: Авг. 10, 2024

Imagine if our brains could unconsciously predict future events. This study explores this concept, presenting evidence for an inherent 'foreseeing' ability, termed anomalous cognition (AC). We introduce a new experimentally verifiable approach to explain information anticipation (AIA), type of AC, based on innovative, quantum-like model implicit learning, grounded in Nonlocal Plasticity Theory (NPT).

Язык: Английский

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Generating three-photon Rabi oscillations without a large-detuning condition

Physical review. A/Physical review, A, Год журнала: 2024, Номер 110(4)

Опубликована: Окт. 11, 2024

It is well known that in the quantum Rabi model, a three-photon resonance occurs when cavity field bare frequency about 1/3 of atomic transition frequency. In this manuscript, we show can also be generated absence ``1/3 condition'' by employing an artificial atom with tunable To realize protocol, modulation should comparable to order induce counter-rotating interaction effective Hamiltonian. way, oscillations observed small-detuning regime, avoiding excitation high-energy states atom. We derive Hamiltonian (equivalent anisotropic model Hamiltonian) determine magnitude energy splitting and position. Numerical simulation results protocol not only generates resonance, but has detectable output photon flux. hope exploited for realization Fock-state sources generation multiparticle entanglement.

Язык: Английский

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Surface Phonon Polariton Ellipsometry

ACS Photonics, Год журнала: 2025, Номер unknown

Опубликована: Янв. 16, 2025

Surface phonon polaritons (SPhPs) have become a key ingredient for infrared nanophotonics owing to their long lifetimes and the large number of polar dielectric crystals supporting them. While these evanescent modes been thoroughly characterized by near-field mapping or far-field intensity measurements over past decade, optical experiments also providing phase information are less common. In this Article, we study surface at gallium phosphide (GaP)–air interface in momentum domain using Otto-type prism coupling geometry. We combine method with spectroscopic ellipsometry obtain both amplitude on reflected waves across entire reststrahlen band GaP. By adjusting prism–sample air gap width, systematically dependence parameters efficiency. particular, show that combined observation parameters, phase, provides powerful tool detection SPhPs, even presence high losses. Finally, theoretically how polariton can reveal emergence vibrational strong through changes topology complex plane trajectories, opening up new perspective light–matter coupling.

Язык: Английский

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Floquet Engineering the Quantum Rabi Model in the Ultrastrong Coupling Regime

Physical Review Letters, Год журнала: 2025, Номер 134(6)

Опубликована: Фев. 12, 2025

We study the quantum Rabi model for a two-level system coupled to quantized cavity mode under periodic modulation of cavity-dipole coupling in ultrastrong regime, leading rich Floquet states. Exploiting vacuum, we show how purely mechanical driving can produce real photons, depending on strength and frequency rate. This scheme is promising coherent manipulation hybrid systems vacuum effects, with potential applications state engineering, information processing, nonequilibrium phenomena.

Язык: Английский

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Reinforcement Learning Enhancing Entanglement for Two-Photon-Driven Rabi Model

Physics Letters A, Год журнала: 2025, Номер unknown, С. 130368 - 130368

Опубликована: Фев. 1, 2025

Язык: Английский

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Deterministic single-phonon-to-photon quantum transducer for distributed quantum networks

Physical review. A/Physical review, A, Год журнала: 2025, Номер 111(2)

Опубликована: Фев. 20, 2025

Язык: Английский

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