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Cavity quantum electrodynamics, which investigates the granularity of light by coupling a resonator to a nonlinear emitter 1, has played a crucial role in the progress of modern quantum information science and technology. We assemble the lattice of niobium superconducting resonators 6 and 7 and break time-reversal symmetry by inserting ferrimagnets 7 before coupling the unit to a transmon qubit. We also demonstrate the ability to use the transmon to register individual photons 8 within each mode of the topological band diagram.
Based on a single-ended medium-finesse optical cavity containing a mesoscopic atomic ensemble, we demonstrate a new strategy for optical quantum engineering based on a single-ended medium-finesse optical cavity containing a mesoscopic atomic ensemble. We observe collectively-enhanced Rabi oscillations between these states, optically distinguishing them in a single shot with a 95% success, and demonstrate that a change between the two internal states of the superatom causes a u03c0 phase rotation on the light reflecting off of the cavity.
In this paper, the intensity-amplitude correlation functions for a driven cavity QED system containing two non-identical atoms are investigated. Time-dependent intensity-amplitude correlation functions can be determined experimentally with the support of conditional homodyne detection. When the driving field is set to be resonant with the two-photon excitation state, which causes non-Gaussian fluctuations, we find time asymmetry in this relationship. Consequently, a new classical inequality based on the method of homodyne cross-correlation analysis is used to determine the nonclassicality of the non-Gaussian system in the area of unsqueezing.
We were able to precisely measure taper transmission as a function of radius by consistently monitoring the finesse and fiber radius during the production of a nanofiber of two fiber Bragg gratings.
Any MQC simulations can be quickly used by the nuclear gradient expression, which would also allow one to perform the non-adiabatic simulation of polariton quantum dynamics on the fly. With a strict numeric gradient of the molecule-cavitity hybrid system, the theoretical results in this work could help the polariton quantum dynamics community with a large numeric gradient, and may have a large effect on future non-adiabatic simulations of polariton quantum dynamics.
We present a proposal for determining deterministic ion-photon qubit exchange, namely a SWAP gate based on real cavity-QED systems with 171Yb+, 40Ca+, and 138 billion ions. In upcoming photonic qubit, the gate can also function as a single-photon quantum memory, in which an outgoing photon heralds the successful arrival of the new photonic qubit. Although strong coupling, namely having the single-photon Rabi frequency be the system's fastest rate, is often assumed essential, this gate needs only Purcell enhancement, i. e.
We find that the steady-state version of the system has a multitude of stability characteristics, which is similar to that in the optomechanical system. We observe a narrow transparent window in the output field, which we attribute to the dressed states created by the effective coupling between the atom's vibration degree and the optical mode in the cavity. We hope that our report will broaden the use of the cavity QED system to quantum techniques.
Intermolecular van der Waals interactions are key to chemical and physical phenomena ranging from biomolecule binding to soft-matter phase transitions. Moreover, we also use non-perturbative extitab initio cavity quantum electrodynamics calculations to create machine learning-based van der Waals interaction potentials for molecules within optical cavities. In particular, we observe a collective orientation change in multiple-molecule systems as a result of cavity-modified van der Waals interactions.
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