The two-body interaction with a circle in time
The two-body random spin ensemble and a new type of quantum phase transition
The Two-State Vector Formalism
The Two-State Vector Formalism of Qauntum Mechanics: an Updated Review
The U(1) Lattice Gauge Theory Universally Connects All Classical Models with Continuous Variables, Including Background Gravity
The ubiquitous XP commutator
The ultimate quantum limit to the linewidth of lasers
The Ultimate Solution to the Quantum Battle of the Sexes game
The ultra-sensitive electrical detection of spin Rabi oscillation at paramagnetic defects
The uncertainty principle determines the non-locality of quantum mechanics
The Uncertainty Principle in the Presence of Quantum Memory
The uncertainty relation for joint measurement of position and momentum
The Uncertainty Relation for Quantum propositions
The Uncertainty Relation for Smooth Entropies
The Uncertainty Relation in "Which-Way" Experiments: How to Observe Directly the Momentum Transfer using Weak Values
The Uncertainty Way of Generalization of Coherent States
The underlying digraph of a coined quantum random walk
The uniqueness question in the multidimensional moment problem with applications to phase space observables
The Uniqueness Theorem for Entanglement Measures
The Unitary Transformation in Quantum Teleportation