query: Why cannot we add gravity in quantum mechanics without additional dimensions as done in bosonic or superstring theory?
positive_passages.docid: 4597
positive_passages.text: A list of inconveniences between quantum mechanics and (general) relativity?
negative_passages.docid: 136184
negative_passages.text: Why we dont have "direct" velocity operator just as $p$? ( as use $p$ space not $v$? ) in quantum mechanics?
negative_passages.docid: 83341
negative_passages.text: How can Planck units be consistent with conflicting dimensions of mass?
negative_passages.docid: 76779
negative_passages.text: Are there bound states from light-light or gravity-gravity scattering in general relativity?
negative_passages.docid: 64286
negative_passages.text: How can gravitions exist without violating GR?
negative_passages.docid: 113516
negative_passages.text: Why can we only add or subtract things of the same dimension (meters/second, newtons, etc)?
negative_passages.docid: 106119
negative_passages.text: Why is there no permittivity-type constant for gravitation?
negative_passages.docid: 147491
negative_passages.text: When is separating the total wavefunction into a space part and a spin part possible?
negative_passages.docid: 54193
negative_passages.text: Can light exist in $2+1$ or $1+1$ spacetime dimensions?
negative_passages.docid: 156809
negative_passages.text: Loop-Quantum Gravity versus String Theory
negative_passages.docid: 151855
negative_passages.text: Non-linearity and self-coupling of gravity
negative_passages.docid: 32625
negative_passages.text: More than one time dimension
negative_passages.docid: 134697
negative_passages.text: How does classical GR concept of space-time emerge from string theory?
negative_passages.docid: 82894
negative_passages.text: Why cannot fermions have non-zero vacuum expectation value?
negative_passages.docid: 42414
negative_passages.text: Why there is no unique "recipe" for quantization of a classical theory?
negative_passages.docid: 117705
negative_passages.text: Vacuum and repulsive gravity
negative_passages.docid: 44239
negative_passages.text: Why the extra term $\frac{1}{2}(\partial_{\rho}A^{\rho})^2$ in the photon Lagrangian?