A compact broadband Edge-Line Coupler (ELC) based on Parity Time-reversal Duality (PTD) symmetry has been conceived, designed, constructed and measured.The coupler connects four PTD bifilar edge lines (BELs), recently introduced by the authors. The PTD-BELs are constituted by a parallel plate ...
As it turns out, these properties are not restricted to a combination of parity flip and time reversal, but can in fact be generalized to all self-inverse antiunitary operators16. The notion of PT symmetry encountered particularly fertile ground in photonics, where the imaginary part of ...
Parity-time (PT) symmetry-based manipulation of linewidth and intensity enhancement.aUpper: schematic of the wavelength conversion, where a strong continuous-wave (CW) pump light is applied to convert a high-speed optical data stream carried by a signal wave to an idler wave. Middle and bottom...
The most intriguing characteristic of a pseudo-Hermitian Hamiltonian is the existence of a critical threshold above which the system undergoes a spontaneous breaking of parity-time (PT) symmetry. In this regime, the spectrum is no longer real but it becomes complex. Optics could be an ideal ...
When the gain-to-loss ratio is varied, the system exhibits a transition from a PT-symmetric phase to a broken-PT-symmetric phase. This PT-phase transition results in the reversal of the pump and gain dependence of the transmission rates. Moreover, we show that by tuning the pump power ...
time reversal operation 14,15 . In optical systems, where the symmetry conditions can be met by engineering the gain/loss regions and their coupling, PT-symmetric systems have exhibited unusual properties 16–20 . A linear PT-symmetric system supports two phases, depending on the magnitude...
The application of these techniques in studies of Time Reversal Symmetry is discussed.doi:10.1016/0375-9474(91)90217-TJ.D. BowmanC.D. BowmanJ. KnudsonS. PenttilaeH. PostmaNuclear Physics A
PARITY, TIME REVERSAL SYMMETRY AND ELECTRIC DIPOLE MOMENTSNorman F Ramsey
Here P^ and T^ are the parity and time-reversal operators, respectively. PT symmetry is said to be unbroken if every eigenstate of H^ is PT-symmetric; then, the entire spectrum is real even though H^ is not Hermitian. PT symmetry is said to be spontaneously broken if some tehigoeungsh...
A non-Hermitian parity-time reflection symmetric (PT-symmetric) Hamiltonian, that is invariant under combined parity(P)and time-reversal(T)operations, has been considered as a natural extension of the conventional Hermitian quantum theory to describe an open quantum system with balanced loss and gain...