The recently developed notion of parity–time (PT) symmetry in optical systems has spawned intriguing prospects. So far, most experimental implementations have been reported in solid-state systems. Here, we report the first experimental demonstration of optical anti-PT symmetry—the counterpart of ...
anti-parity-time symmetric phase transitions and exceptional point singularities are demonstrated in a single strand of single-mode telecommunication fibre, using a setup consisting of off-the-shelf components. Two propagating signals are amplified and coupled through stimulated Brillouin scattering, enabling...
[1] demonstrated that an anti-parity-time (anti-PTPT) symmetric EP can be located by damping a linear oscillator. In recent years, unique features of the non-Hermitian anti-PTPT symmetry have attracted considerable interest, with applications in controlling wave phenomena [2] and diffusive ...
Parity-time (PT) symmetry in non-Hermitian optical systems promises distinct optical effects and applications not found in conservative optics. Its counterpart, anti-PT symmetry, subscribes another class of intriguing optical phenomena and implies complementary techniques for exotic light manipulation. Desp...
Parity-time symmetry in optics is studied in a warm atomic vapour, where its counterpart, anti-parity-time symmetry, as well as refractionless propagation, can also be observed. P Peng,W Cao,C Shen,... - 《Nature Physics》 被引量: 12发表: 2016年 Giant nonlinearity via breaking parity-ti...
The discovery of the antiproton some 40 years ago and the almost synchronous fall of parity (P) and charge conjugation (C) symmetries were soon followed by the realization that CPT rather than C invariance is the fundamental symmetry connecting matter and antimatter, and that consequently any mea...
Here, we experimentally realize lasing and anti-lasing at the same frequency in a single cavity using parity–time symmetry. Because of the time-reversal property, the demonstrated lasing and anti-lasing resonances share common resonant features such as identical frequency dependence, coherent in-...
Finding any slight difference between spectral transitions in antimatter and matter would challenge charge–parity–time symmetry, and perhaps cast light on the cosmological imbalance of matter and antimatter. Historically, researchers have struggled to laser-cool normal hydrogen, so this has been a bit...
Dynamically encircling an exceptional point (EP) in parity-time (PT) symmetric waveguide systems exhibits interesting chiral dynamics that can be applied to asymmetric mode switching for symmetric and anti-symmetric modes. The counterpart symmetry-broken
Non-Hermitian Hamiltonians, satisfying parity-time (\({{{\mathcal{P}}}{{{\mathcal{T}}}\)) symmetry, can have real eigenvalues in the symmetry unbroken zone1,2,3. A \({{{\mathcal{P}}}{{{\mathcal{T}}}\)-symmetric Hamiltonian satisfies \([\hat{H},\hat{{{\mathcal{P}...