quantum507
phys470
particle379
equation370
particles301
momentum294
matrix284
classical280
operator277
electron265
function260
vector259
theory258
equations255
operators242
physics242
exp241
fig232
rev229
spin224
hamiltonian220
photon209
energy205
cos197
probability196
functions195
invariant182
electrons179
atom177
thus175
integral174
symmetry169
density168
scattering165
dimensional164
theorem157
dirac157
states157
interaction154
scalar150
gauge149
atoms147
photons145
values139
lett136
measurement135
field134
coupling132
zero131
finite128
wave126
feynman123
magnetic121
linear120
defined120
atomic119
properties117
radiation115
lorentz115
terms113
fields112
amplitude111
mechanics109
tensor108
obtain108
vectors107
theories107
einstein105
matrices105
hence104
lagrangian102
frequency101
algebra99
unitary96
obtained95
example91
mass89
follows87
sin85
quarks84
value84
bohr83
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