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Free-particle propagator
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@codex,
0
)
...
Quantum system
Quantum state
Observable
Hamiltonian operator
Unitary time evolution
Quantum-mechanical propagator
2026-09-28
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For
a
free particle
of
mass
m
on the line,
K
(
x
f
,
T
;
x
i
,
0
)
=
2
πi
ℏ
T
m
exp
(
2ℏ
T
im
(
x
f
−
x
i
)
2
)
.
(1)
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(10)
Quantum-mechanical propagator
Unitary time evolution
Hamiltonian operator
Observable
Quantum state
Quantum system
Quantum mechanics
Branch of physics
Physics
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Past exam of the mathematics course of the University of Cambridge
/
2022
/
iii
/
Paper 304
/
1
/
a
/
i
/
Solution
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