In this work we propose the use of anti-parity-time symmetry for refractive index sensing.Martino De CarloFrancesco De LeonardisVittorio M. N. PassaroProceedings of OSA
The recently-developed notion of 'parity-time (PT) symmetry' in optical systems with a controlled gain-loss interplay has spawned an intriguing way of achieving optical behaviors that are presently unattainable with standard arrangements. In most experimental studies so far, however, the ...
Observation of parity-time symmetry for evanescent waves Zhaoxian Chen Huan He Andrea Alù Communications Physics(2024) Exceptional points and non-Hermitian photonics at the nanoscale Aodong Li Heng Wei Lin Chen Nature Nanotechnology(2023) Theoretical and experimental characterization of non-Markovian anti...
Non-Hermitian systems obeying parity-time (PT) symmetry, i.e., [PT,H] = 0, withHbeing the non-Hermitian Hamiltonian, have attracted considerable attention in recent years1,2,3,4. Most of the interesting properties of non-Hermitian systems are found at the exceptional point (EP)5,6,...
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...
Furthermore, the two conformers at τ = 45° and 135° have D2 symmetry and are thus enantiomeric. The global energy barrier (~ 16 kJ/mol) occurs at torsion angles of 0° and 180°, which correspond to a single planar conformation. Here, steric hindrance between the four ortho-hydrogen...
(2)_Limes SU(2)_Rimes SU(4)_c$ models with the see-saw mechanism for neutrino masses and an R-parity conserving vacuum, there are diquark Higgs bosons with masses ($M_{qq}$) near the weak scale even though the scale of $SU(2)_Rimes SU(4)_c$ symmetry breaking is around $10^...
The study of parity-time (PT) symmetric optical systems has recently attracted much attention. Here, the authors experimentally study an anti-PT symmetric circuit system and observe an exceptional point with an inverse PT symmetry breaking transition and energy-difference conserving dynamics....
Non-Hermitian Hamiltonians, satisfying parity-time (PT) symmetry, can have real eigenvalues in the symmetry unbroken zone1,2,3. APT-symmetric Hamiltonian satisfies[H^,P^T^]=0, with the joint parity-time operator (P^T^).PT-symmetric non-Hermitian Hamiltonians feature unconventional properties ...