Concerted efforts are underway to establish an infrastructure for a global quantum Internet to
realise a spectrum of quantum technologies. This will enable more precise sensors, secure …

A few decades ago, quantum optics stood out as a new domain of physics by exhibiting
states of light with no classical equivalent. The first investigations concerned single photons …

By projecting onto complex optical mode profiles, it is possible to estimate arbitrarily small
separations between objects with quantum-limited precision, free of uncertainty arising from …

Manipulation of quantum optical pulses, such as single photons or entangled photon pairs,
enables numerous applications, from quantum communications and networking to …

Sub-Doppler spectroscopy in alkali-metal vapor cells using two counterpropagating dual-
frequency laser beams allows the detection of high-contrast sign-reversed natural-linewidth …

Measuring the spectral properties of an optical frequency comb is among the most
fundamental tasks of precision metrology. In contrast to general single-parameter …

We propose a device consisting of m Mach-Zehnder interferometers and realizing sorting of
the first 2 m temporal Hermite-Gauss modes of light passing through it by adjusting the …

The power spectrum of an optical field can be acquired without a spectrally resolving
detector by means of Fourier-transform spectrometry, based on measuring the temporal …

The large capacity and robustness of information encoding in the temporal mode of photons
is important in quantum information processing, in which characterizing temporal quantum …

The ability to characterize the complete quantum state of light is essential for both
fundamental and applied science. For single photons the quantum state is provided by the …