query: What is the source of the difficulty (within the variational approach framework) in the attempt to unify quantum mechanics with general relativity?
positive_passages.docid: 4597
positive_passages.text: A list of inconveniences between quantum mechanics and (general) relativity?
negative_passages.docid: 18321
negative_passages.text: Smoothness constraint of wave function
negative_passages.docid: 59657
negative_passages.text: On the nature of the collapse of the wave function
negative_passages.docid: 149535
negative_passages.text: What is the constraint on the Gauge Potential in the Covariant Gauges?
negative_passages.docid: 18564
negative_passages.text: Why is the symmetry variation $\delta_s q$ different from the ordinary variation $\delta q$?
negative_passages.docid: 76894
negative_passages.text: Why is spacetime not Riemannian?
negative_passages.docid: 68813
negative_passages.text: Geodesic Equation from variation: Is the squared lagrangian equivalent?
negative_passages.docid: 15731
negative_passages.text: When is stress-energy tensor defined as variation of action with respect to metric conserved?
negative_passages.docid: 87800
negative_passages.text: Covariant derivative ambiguity
negative_passages.docid: 88525
negative_passages.text: Action and Action integral: Different kinds of variational principles
negative_passages.docid: 79822
negative_passages.text: Problems with partial derivatives.
negative_passages.docid: 61603
negative_passages.text: Why is the Yang–Mills existence and mass gap problem so fundamental?
negative_passages.docid: 36380
negative_passages.text: Why not use the Lagrangian, instead of the Hamiltonian, in nonrelativistic QM?
negative_passages.docid: 48114
negative_passages.text: Quantum mechanics - how can the energy be complex?
negative_passages.docid: 134164
negative_passages.text: What is wrong with the De Broglie–Bohm theory a.k.a "Causal Interpretation" of quantum theory?
negative_passages.docid: 55700
negative_passages.text: Is it possible to recover Classical Mechanics from Schrödinger's equation?
negative_passages.docid: 35298
negative_passages.text: A question about the higher-order Weyl variation for the geodesic distance