Theoretical proposals to measure resonator-induced modifications of the electronic ground state in doped quantum wells

Wang, Yuan; Liberato, Simone De

doi:10.1103/physreva.104.023109

Cited by 3 publications

(1 citation statement)

References 61 publications

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“…Our work demonstrates the feasibility of implementing nonlinear phase operations at THz frequencies using current available nanocavities [16,37,40] and contributes to the development of quantum optics in the high-THz regime [69,80], which can enable fundamental studies of cavity QED [81,82], material and…”

Section: Discussionmentioning

confidence: 87%

Coherent anharmonicity transfer from matter to light in the THz regime

Arias,

Triana,

Delgado

et al. 2024

New J. Phys.

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Optical nonlinearities are fundamental in several types of optical information processing protocols. However, the high laser intensities needed for implementing phase nonlinearities using conventional optical materials represent a challenge for nonlinear optics in the few-photon regime. We introduce an infrared cavity quantum electrodynamics (QED) approach for imprinting nonlinear phase shifts on individual THz pulses in reﬂection setups, conditional on the input power. Power-dependent phase shifts on the order of 0.1 π can be achieved with femtosecond pulses of only a few µW input power. The proposed scheme involves a small number of intersubband quantum well transition dipoles evanescently coupled to the near ﬁeld of an infrared resonator. The ﬁeld evolution is nonlinear due to the dynamical transfer of spectral anharmonicity from material dipoles to the infrared vacuum, through an eﬀective dipolar chirping mechanism that transiently detunes the quantum well transitions from the vacuum ﬁeld, leading to photon blockade. We develop analytical theory that describes the dependence of the imprinted nonlinear phase shift on relevant physical parameters. For a pair of quantum well dipoles, the phase control scheme is shown to be robust with respect to inhomogeneities in the dipole transition frequencies and relaxation rates. Numerical results based on the Lindblad quantum master equation validate the theory in the regime where the material dipoles are populated up to the second excitation manifold. In contrast with conventional QED schemes for phase control that require strong light-matter interaction, the proposed phase nonlinearity works best in weak coupling, increasing the prospects for its experimental realization using current nanophotonic technology.

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Section: Discussionmentioning

confidence: 87%

Coherent anharmonicity transfer from matter to light in the THz regime

Arias,

Triana,

Delgado

et al. 2024

New J. Phys.

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Tutorial on nonperturbative cavity quantum electrodynamics: is the Jaynes–Cummings model still relevant?

De Bernardis,

Mercurio,

De Liberato

2024

J. Opt. Soc. Am. B

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In this tutorial review, we briefly discuss the role that the Jaynes–Cummings model occupies in present-day research in cavity quantum electrodynamics with a particular focus on the so-called ultrastrong-coupling regime. We start by critically analyzing the various approximations required to distill such a simple model from standard quantum electrodynamics. We then discuss how many of those approximations can be, and often have been, broken in recent experiments. The consequence of these failures has been the need to abandon the Jaynes–Cummings model for more complex models. In this, the quantum Rabi model has the most prominent role, and we will rapidly survey its rich and peculiar phenomenology. We conclude the paper by showing how the Jaynes–Cummings model still plays a crucial role even in nonperturbative light–matter coupling regimes.

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Release of virtual photon and phonon pairs from qubit-plasmon-phonon ultrastrong coupling system

Ma,

Liu,

2023

Opt. Express

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The most important difference between ultrastrong and non-ultrastrong coupling regimes is that the ground state contains excitations. We consider a qubit-plasmon-phonon ultrastrong coupling (USC) system with a three-level atom coupled to the photon and phonon via its upper two energy levels and show that spontaneous emission of the atom from its intermediate to its ground state produces photon and phonon pairs. It is shown that the current system can produce a strong photon/phonon stream and the atom-phonon coupling plays the active role, which ensures the experimental detection. The emission spectrum and various high-order correlation functions confirm the generation of the pairs of photons and phonons. Our study has important implications for future research on virtual photon and phonon pairs creation in the ground state of the USC regime.

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Theoretical proposals to measure resonator-induced modifications of the electronic ground state in doped quantum wells

Cited by 3 publications

References 61 publications

Coherent anharmonicity transfer from matter to light in the THz regime

Coherent anharmonicity transfer from matter to light in the THz regime

Tutorial on nonperturbative cavity quantum electrodynamics: is the Jaynes–Cummings model still relevant?

Release of virtual photon and phonon pairs from qubit-plasmon-phonon ultrastrong coupling system

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