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 rep
Non-Hermitian Hamiltonians, satisfying parity-time (PT) symmetry, can have real eigenvalues in the symmetry unbroken zone1,2,3. A PT-symmetric Hamiltonian satisfies [H^,P^T^]=0, with the joint parity-time operator (P^T^). PT-symmetric non-Hermitian Hamiltonians feature unconventional propert...
As Musk steps back from his government role, we look back at the unforgettable, and often controversial, moments that made his time in Washington stand out. Laura MannweilerMay 7, 2025 The central bank has been sidelined as President Donald Trump’s tariffs take center stage...
As Musk steps back from his government role, we look back at the unforgettable, and often controversial, moments that made his time in Washington stand out. Laura MannweilerMay 7, 2025 The central bank has been sidelined as President Donald Trump’s tariffs take center stage in the ...
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The other fundamental interactions of nature, described by a relativistic quantum field theory—the Standard Model of particle physics—also show complete symmetry between matter and antimatter systems as a consequence of the CPT (Charge, Parity, Time reversal) theorem. This CPT symmetry demands, in...
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In Time Magazine, a psychologist and a pollster wrote that “estrangement has become an epidemic in America.” “Epidemic” may be hyperbolic, but I agree it’s happening more often lately. But the solution isn’t to tell left-wingers that it’s our responsibility to keep up loving relatio...
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