We demonstrate a superconducting artificial atom with strong unidirectional coupling to a
microwave photonic waveguide. Our artificial atom is realized by coupling a transmon qubit …

Despite the essential difference in underlying physics, electromagnetically induced
transparency (EIT) and Autler–Townes splitting (ATS) are difficult to be discriminated …

The atom-based traceable standard for microwave electrometry shows promising
advantages by enabling stable and uniform measurement. Here we theoretically propose …

We investigate the interaction of laser pulses carrying orbital angular momentum (OAM) with
a symmetry-broken ladder-type quantum coupling scheme involving three internal states. A …

In recent years, the characterization of radiation falling within the so-called “terahertz (THz)
gap” has become an ever more prominent issue due to the increasing use of THz systems in …

The data transfer capacity of a communication channel is limited by the Shannon–Hartley
theorem and scales as log 2 (1+ SNR) for a single channel with a given power signal-to …

Electromagnetically induced transparency (EIT) and Autler-Townes splitting (ATS) are
similar, but different quantum optical phenomena: EIT results from a Fano interference …

Controlling coherent interaction between optical fields and quantum systems in scalable,
integrated platforms is essential for quantum technologies. Miniaturised, warm alkali-vapour …

We investigate and employ optical Rydberg resonances in an atomic vapor cell for
measurements of high-intensity VHF-band radio frequency (rf) electric fields. An atomic …

The coupling of plasmons and vibrational modes has been routinely observed in graphene
and other 2D systems in both near-field and far-field spectroscopy. However, the relation …