More than a decade ago, it was shown that non-Hermitian Hamiltonians with combined parity (P) and time-reversal (T) symmetry exhibit real eigenvalues over a range of parameters. Since then, the field of PT symmetry has seen rapid progress on both the theoretical and experimental fronts. ...
time reversal symmetry and the temporal distribution of the gain and loss. Consequently, the non-Hermitian system strictly retains both the real eigenvalue spectrum and the topological properties of the Hermitian case, despite undergoing an unequivocally non-unitary time evolution that distinguishes it ...
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...
The dynamic Mott transition is identified as a PT symmetry-breaking phase transition, with the Mott insulating state corresponding to the regime of unbroken PT symmetry with a real energy spectrum. We establish that the imaginary part of the Hamiltonian arises from the combined effects of the ...
Parity-time (PT) symmetry has made encouraging progress in wireless power transmission (WPT), exhibiting significant advantages in terms of system robustness and transmission efficiency. However, there are still challenges that need to be addressed, particularly when classical schemes operate at a fixed...
This periodic microstructure has separately broken symmetries in both parity (P) and time-reversal (T) but obeys parity-time (PT) symmetry. This kind of diode could support bulk one-way propagating modes either for group velocity or phase velocity with various types of negative and positive ...
摘要: We predict that directional coupler of quadratically nonlinear and lossy waveguides can perform ultrafast signal switching and parametric amplification, using the pump-controlled breaking of the parity-time anti-symmetry associated with nonlinear wave mixing....
As inspired by PT-symmetric quantum systems, this circuit has a non-Hermitian effective Hamiltonian that commutes with the antilinear, combinedn${mathcal {PT}}$noperator, wheren${mathcal {P}}$nandn${mathcal {T}}$nare parity-inversion and time-reversal operators. We demonstrate that the ...
Parity-even time reversal violation (TRV) in the nucleon-nucleon interaction is reconsidered. The TRV $\rho$-exchange interaction on which recent analyses of measurements are based is necessarily also charge-symmetry breaking (CSB). Limits on its strength $\bar{g}_\rho$ relative to regular $\...
As it turns out, these properties are not restricted to a com- bination 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 imagi- nary part of...