Ultrastrong light–matter coupling in semiconductors

Peraca, Nicolás Márquez; Baydin, Andrey; Gao, Weilu; Bamba, Motoaki; Kono, Junichiro

doi:10.1016/bs.semsem.2020.10.002

Cited by 12 publications

(9 citation statements)

References 265 publications

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“…The USC regime arises when g becomes a significant fraction of the bare uncoupled matter and light frequency at zero detuning, ω 0 , conventionally defined as g 0.1ω 0 . Nontrivial vacuum electromagnetic fluctuations can interact with the matter and modify the properties of the system in the USC regime [121]. In this subsection, we review the enhancement of single-photon emission in CNT systems in the WC regime using different cavity designs.…”

Section: Cavity Enhancement Of Single-photon Emissionmentioning

confidence: 99%

Carbon Nanotube Devices for Quantum Technology

et al. 2022

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Carbon nanotubes, quintessentially one-dimensional quantum objects, possess a variety of electrical, optical, and mechanical properties that are suited for developing devices that operate on quantum mechanical principles. The states of one-dimensional electrons, excitons, and phonons in carbon nanotubes with exceptionally large quantization energies are promising for high-operating-temperature quantum devices. Here, we discuss recent progress in the development of carbon-nanotube-based devices for quantum technology, i.e., quantum mechanical strategies for revolutionizing computation, sensing, and communication. We cover fundamental properties of carbon nanotubes, their growth and purification methods, and methodologies for assembling them into architectures of ordered nanotubes that manifest macroscopic quantum properties. Most importantly, recent developments and proposals for quantum information processing devices based on individual and assembled nanotubes are reviewed.

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Section: Cavity Enhancement Of Single-photon Emissionmentioning

confidence: 99%

Carbon Nanotube Devices for Quantum Technology

et al. 2022

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“…Interestingly, these two modes exhibit anticrossing behaviors, which is an indication of strong coupling/hybridization. [81][82][83] To explain the hybridization between the qFM and qAFM modes, the authors developed a microscopic model, which includes interactions between spins in the two sublattices, their symmetric exchange and antisymmetric exchange, the singleion anisotropies, and the Zeeman interaction. The system was effectively described by two coupling strengths g 1 (corotating coupling strength) and g 2 (counter-rotating coupling strength).…”

Section: Magnons 331 Ultrastrong Magnon-magnon Coupling In Yfeomentioning

confidence: 99%

Magneto-optical Spectroscopy with RAMBO: A Table-Top 30 T Magnet

Tay,

Baydin,

Katsutani

et al. 2022

Preprint

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Optically probing materials in high magnetic fields can provide enlightening insight into field-modified electronic states and phases, while optically driving materials in high magnetic fields can induce novel nonequilibrium many-body dynamics of spin and charge carriers. While there are high-field magnets compatible with standard optical spectroscopy methods, they are generally bulky and have limited optical access, which prohibit performing state-of-the-art ultrafast and/or nonlinear optical experiments. The Rice Advanced Magnet with Broadband Optics (RAMBO), a unique 30-T pulsed mini-coil magnet system with direct optical access, has enabled previously challenging experiments using femtosecond optical pulses, including time-domain terahertz spectroscopy, in cutting-edge materials placed in strong magnetic fields. Here, we review recent experimental advances made possible by the first-generation RAMBO setup. After summarizing technological aspects of combining optical spectroscopic techniques with the mini-coil magnet, we describe results of magneto-optical studies of a wide variety of materials, providing new insight into the states and dynamics of four types of quasiparticles in solids -excitons, plasmons, magnons, and phonons -in high magnetic fields.

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“…As it describes the collective degrees of freedom of a set of two-level systems (qubits), the Dicke Hamiltonian offers a general description of the spin–boson interaction. Additionally, it constitutes a paradigmatic example for the study of the ultra-strong coupling (USC) regime [ 13 , 14 , 15 ] Consequently, the model has found a great reception in the description of several setups, mainly in the context of quantum information [ 16 , 17 , 18 , 19 ]. In recent years, it has been experimentally realized in a broad range of tunable systems, from Bose–Einstein condensates in optical lattices [ 7 , 20 , 21 , 22 , 23 ], superconducting qubits [ 24 , 25 , 26 ] to cavity-assisted Raman transitions [ 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Critical Phenomena in Light–Matter Systems with Collective Matter Interactions

Herrera

Bastarrachea-Magnani

Linares

2022

Entropy

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We study the quantum phase diagram and the onset of quantum critical phenomena in a generalized Dicke model that includes collective qubit–qubit interactions. By employing semiclassical techniques, we analyze the corresponding classical energy surfaces, fixed points, and the smooth Density of States as a function of the Hamiltonian parameters to determine quantum phase transitions in either the ground (QPT) or excited states (ESQPT). We unveil a rich phase diagram, the presence of new phases, and new transitions that result from varying the strength of the qubits interactions in independent canonical directions. We also find a correspondence between the phases emerging due to qubit interactions and those in their absence but with varying the strength of the non-resonant terms in the light–matter coupling. We expect our work to pave the way and stimulate the exploration of quantum criticality in systems combining matter–matter and light–matter interactions.

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Ultrastrong light–matter coupling in semiconductors

Cited by 12 publications

References 265 publications

Carbon Nanotube Devices for Quantum Technology

Carbon Nanotube Devices for Quantum Technology

Magneto-optical Spectroscopy with RAMBO: A Table-Top 30 T Magnet

Critical Phenomena in Light–Matter Systems with Collective Matter Interactions

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