Purity Swapping in the Jaynes-Cummings Model: Obtaining Perfect Interference Patterns from Totally Unpolarized Qubits
Purity-bounded uncertainty relations in multidimensional space -- generalized purity
Purple bacteria and quantum Fourier transform
Push button generation of multiphoton entanglement
Putting a Spin on the Aharonov-Bohm Oscillations
Puzzlement about thermal redshift
Puzzles of Divergence and Renormalization in Quantum Field Theory