Operator ordering and causality

Operator perturbation theory in the backward Heisenberg picture

Operator Quantum Error Correcting Subsystems for Self-Correcting Quantum Memories

Operator quantum error correction

Operator quantum error correction for continuous dynamics

Operator Quantum Geometric Tensor and Quantum Phase Transitions

Operator representations for a class of quantum entanglement measures and criterions

Operator space entanglement entropy in transverse Ising chain

Operator Space Entanglement Entropy in XY Spin Chains

Operator Space theory: a natural framework for Bell inequalities

Operator Transformations Between Exactly Solvable Potentials and Their Lie Group Generators

Operator-Schmidt decomposition and the geometrical edges of two-qubit gates

Operator-Schmidt decomposition of the quantum Fourier transform on C^N1 tensor C^N2

Operator-Schmidt decompositions and the Fourier transform, with applications to the operator-Schmidt numbers of unitaries

Operator-sum Representation for Bosonic Gaussian Channels

Operator-sum representation of time-dependent density operators and its applications

Operators and their symbols in the optical probabilistic representation of quantum mechanics

Operators for the Aharonov-Anandan and Samuel-Bhandari Phases

Opposite Arrows of Time Can Reconcile Relativity and Nonlocality

Opposite sign correlations in fermion or boson gases