最終更新日：2024/07/30
(physics, philosophy) The hypothetical observer in a thought experiment in which Wigner, absent when his friend observes the state of a particle (in some versions, Schrödinger's cat) as it collapses from quantum superposition, concludes that both the particle and his friend remain in quantum superposition until Wigner himself learns the result of the observation.
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Wigner's friend
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Wigner's friend
name
(physics,
philosophy)
The
hypothetical
observer
in
a
thought
experiment
in
which
Wigner,
absent
when
his
friend
observes
the
state
of
a
particle
(in
some
versions,
Schrödinger's
cat)
as
it
collapses
from
quantum
superposition,
concludes
that
both
the
particle
and
his
friend
remain
in
quantum
superposition
until
Wigner
himself
learns
the
result
of
the
observation.
意味（1）
(physics,
philosophy)
The
hypothetical
observer
in
a
thought
experiment
in
which
Wigner,
absent
when
his
friend
observes
the
state
of
a
particle
(in
some
versions,
Schrödinger's
cat)
as
it
collapses
from
quantum
superposition,
concludes
that
both
the
particle
and
his
friend
remain
in
quantum
superposition
until
Wigner
himself
learns
the
result
of
the
observation.
