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Questions tagged [schroedingers-cat]

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What if Schrödinger's cat's meowed?

Sorry if this has been asked (every similar question has a title that basically tags Schrödinger's cat) If after the superposition of the cat being dead and alive at one time was created, and the ...
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Naive question on Schrödinger's cat

What difference does it makes if the same experiment is conducted with a transparent box? I mean what is the significant of the opaque box in the original thought experiment? Can't we observe the ...
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Is the ground state a Schrödinger cat state?

Consider the following Bose-Hubbard Hamiltonian which describes a Bose-Einstein condensate confined in a two-well potential: $$ H= -T(a_L^\dagger a_R + a_L a_R^\dagger ) + \frac{U}{2}(n_L^2+n_R^2-...
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Interference of Schrödinger's Cat states?

A "Schrödinger's cat state" is a macroscopic superposition state. Quantum states can interfere in simple experiments (such as the Mach-Zehnder/Hong-Ou Mandel/etc). Can Schrödinger's cat states be made ...
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Quantum physics - measurement collapsing wave functions

I'm sure variations on this come up a lot, but I was specifically interested in a response to a claim made by a particular article: https://medium.com/@roblea_63049/the-double-slit-experiment-...
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The many world interpretation and immortality [closed]

This question might not be appropriate as it is philosophical on a similar level as the Schrödinger's cat thought experiment. In any case it might be interesting to think about it nonetheless. The ...
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4answers
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Schrödinger's cat bra-ket interpretation [closed]

Let $\vert\text{#}\rangle$ be the vector state of the cat, $\vert1\rangle$ the "alive" state, and $\vert0\rangle$ the "dead" state. Using the normalization condition $\langle \text{#}\vert\text{#}\...
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Schrödinger's Clock [duplicate]

I would be grateful for any comments regarding two variations of Schrödinger's Cat experiment I’ve been pondering. In the first, wishing no harm to the animal, I remove the cat and replace it with a ...
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6answers
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If I was Schrödinger's cat, what would I feel? [closed]

What I'm doing Note before reading: I've made two edits for clarification The first starts at: "To clarify based on answers, I think ya'll are missing the meat of the question:" The second starts ...
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1answer
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Would Schroedinger's cat smell 50% like death? [duplicate]

If we left Schroedinger's cat in a superposition for a week would it begin to start smelling 50% like a dead cat and 50% like a living cat? Would the smell of death immediately disappear if we opened ...
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What is the largest Schrödinger's cat-like experiment ever set up?

I guess largest in this context either means something like the most massive or containing the most states.
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Does the Copenhagen interpretation really predict that Schrödinger's cat is both alive and dead?

Accoring to the Wikipedia article Schrödinger's cat, the answer is yes. I really don't think so. I don't think Schrödinger's cat is a good example because in fact, it's not the case that it will with ...
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Problem/Exercise: Schrödinger's cat (QM) [duplicate]

I've been struggling for a day with the following problem on Quantum coherent states, so I was wondering if you could tell me if I'm going in the right direction (I've checked the books of Sakurai and ...
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What would happen if we put Schrödinger inside the box and the cat opened the box door? [closed]

Schrödinger's cat is a thought experiment, sometimes described as a paradox, devised by Austrian physicist Erwin Schrödinger in 1935. It illustrates what he saw as the problem of the Copenhagen ...
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Is the Copenhagen interpretation falsifiable?

According to the Copenhagen interpretation, physical systems generally do not have definite properties prior to being measured. The Schrödinger's cat is both dead and alive, until an observation is ...
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1answer
103 views

Double-slit experiment on cats makes inconsistency?

According to Wave-Particle Duality, in a normal double-slit experiment, the quantum object behaves as wave and many stripes are displayed on the screen. But if we measure which way the quantum object ...
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3answers
169 views

Schrödinger's cat question

what would happen if a CC Camera or videocorder is put along with Schrödinger's cat inside the sealed box? Would it influence the outcome?
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Macroscopic number of qubits (Sсhrödinger cat)

I noticed, that current designs if quantum computer like IBM Q, include supercooled chamber to allow matter to be in quantum state. I thought, if this really required? To obtain Sсhrödinger cat one ...
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Schrodinger's cat paradox problems

As long as i understand this paradox says this : There is a cat in closed box with some radioactive stuff in it . Now as radioactivity is a purely quantum process the , the material both decays and ...
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Determining the probability of outcomes in a measurement

While showing us the Schrodinger's cat experiment, my physics teacher defined: $$\varphi_\text{alive} = \begin{bmatrix}1\\0\end{bmatrix},\qquad \varphi_\text{dead} = \begin{bmatrix}0\\1\end{bmatrix}, ...
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4answers
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What is the deal with the Schrodinger's cat? Why is it considered a paradox?

What is the deal with the Schrodinger's cat? Why is it considered a paradox? Cat is a macro object. He can be only in 2 states - he's either dead or alive, the fact that you don't have the ...
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3answers
286 views

The Bohm interpretation and Schrodinger's cat

I was wondering how the Bohm interpretation of quantum mechanics would affect the Schrodinger's cat experiment. Would it imply that the cat would be in one state and never in superposition, so the cat ...
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1answer
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Could we ever kill 2 schodinger's cats? [closed]

In the following setup I'll be testing entanglement with 2 cats, namely Mew0 and Mew1 both are positioned exactly a light year away from each other. 2 identical bombs will be strapped to each cat and ...
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Is it possible to prepare cat states of light over different frequencies?

Is it possible to form a superposition state of a single photon in multiple frequencies? As an archetypal example, consider the Schrödinger's-cat state $$ |\psi\rangle = |1;\omega\rangle + |1;2\omega\...
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1answer
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Do quantum events depend on the presence of observer?

Similar to that in the Schrodinger's cat thought experiment the cat remains in superposition unless observed by an observer, also in the double slit experiment an electron is passing through both the ...
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Cat State With Largest Number of Particles

I am wondering what is the largest number of particles that went into creating a successful cat-state? This article gives examples of 6 spins and 4 photons. I am wondering if there have been cat-...
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1answer
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Definition of the words “macroscopic/classical object” vs “quantum object”

Let's take the Schrodinger's cat as an example. In what sense is the cat different from the isotope ? We say that the isotope is "microscopic/quantum" and the cat is "macroscopic/classical" object ...
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In Schrödinger's cat, what is the role of the box?

At university, I asked the question in regards to the classical thought experiment Schrödinger's cat, what is the role of the box? Unfortunately, I didn't get a satisfactory answer. If fact, most ...
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2answers
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Quantum mechanics and gender of unborn baby [duplicate]

Having a debate with my other half here, I'm currently pregnant and we have not had any scans or tests to determine gender of the baby. I'm seeing this as similar to a Schroedinger's cat experiment ...
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1answer
262 views

Are particles really in a superposition before you observe the particle [closed]

So if I understood correctly, Schrodinger's Cat is a thought experiment that puts a cat inside a box, and there's a mechanism that kills the cat with 50% probability based on a quantum process. The ...
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1answer
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Why parallel worlds in MWI do not interact with each other?

The quantum-mechanical " Schrödinger's cat " theorem according to the many-worlds interpretation (MWI). In this interpretation, every event is a branch point; the cat is both alive and dead, even ...
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3answers
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Schrödinger's cat and Gravitational waves

Schrödinger's cat: a cat, a flask of poison, and a radioactive source are placed in a sealed box. If an internal monitor detects radioactivity (i.e., a single atom decaying), the flask is ...
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2answers
337 views

Can the Copenhagen interpretation and the many-worlds theory be somehow reconciled? [closed]

Is it possible that, at the moment of observation, a timeline is created where an object is in a state which contrasts its state in the current timeline? Using Schrodinger's cat as an example, let's ...
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5answers
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Schrödinger's cat being “both dead and alive”

Famously, Schrödinger's cat is found to be both dead and alive within a closed system - at the mercy of quantum mechanics. But why is the cat "both dead and alive"? For the Copenhagen interpretation, ...
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Extension of Schrödinger's cat thought experiment

My question is quite simple. In the thought experiment of Schroedinger's cat: When the scientist measures the state of the cat, its wavefunction collapses into either the alive or dead state. But ...
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2answers
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Variation of schrodinger cat replaced by quantum computer

In the "classical" imaginary Schrodinger's cat experiment, which seems to be no longer serious, or at least irrelevant, by many (some?) people, everything is explained away by decoherence. Now, let ...
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Physiological Significance of Superposition

To what extent is the concept of superposition appropriate to physiology? In other words, can organisms "actually" exist in a state of superposition?
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Geiger counter in the Schrodinger's cat experiment

Inside the Schrodinger's cat's box, the moment the radiation is detected by the counter, doesn't this mean the system already has a fixed eigenstate (a collapsed wave function, or is decoherent, ...
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Schrodinger's cat and consistent histories

I was reading Wikipedia's article on Schrodinger's cat: https://en.wikipedia.org/wiki/Schr%C3%B6dinger%27s_cat#Many-worlds_interpretation_and_consistent_histories Quote: "When opening the box, the ...
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218 views

What exactly is Schrodinger's Cat? [closed]

What exactly is Schrodinger's Cat? The little bit reading I did led me to believe that he wanted to assert the cat is dead OR alive only if you observe. What does it signify? How did it affect the way ...
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Schrodinger cat,another explanation of the phenomena

Much was written about Schrodinger's cat. But I still do not understand one point (may be the crucial one): is it possible that the cat IS actually in ONE state,dead or alive, but as nobody knows ...
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At what point do quantum wave functions collapse? [duplicate]

At what point do quantum wave functions collapse? Let me give you two examples to make that question more clear: Let us think of the double slit experiment. We humans see the light at certain ...
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Wouldn't the cat observe what happened?

Put a cat in a sealed box, Schrödinger said, with a gun that has a 50/50 chance of shooting the cat in response to an unpredictable, random quantum event. Because the box is built so solidly that no ...
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1answer
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How to visualize a Schrödinger cat state?

I recently read about Schrödinger cat states, which are basically a superposition of two coherent states $|\alpha\rangle$ with opposite phases, that is, $$ |\mathrm{cat}\rangle = |\alpha\rangle \pm |{-...
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Doesn't Schrodinger's Cat depend on whether there's a quantum/classical boundary?

Everyone knows how Schrodinger's Cat is set up, so the question becomes whether there's a quantum/classical boundary and what that boundary is. Some people say everything is quantum while some may ...
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How to reconcile active and passive observation in quantum physics?

The two-slit experiment is a classic example of how measurements can affect the behavior of particles. This seems reasonable because, to my knowledge, the measurement is "active" in that it adds ...
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1answer
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How to check whether Schrödinger's cat was in superposition of states?

Suppose we can make an arbitrarily precise preparation of a Schrödinger's cat (and isolate it arbitrarily well so that decoherence is not a problem). If we prepare lots of cats in this state, what ...
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2answers
318 views

Copenhagen interpretation

Reading some science history, Werner Heisenberg and Bohr created the Copenhagen interpretation, but what I didn't get is how can we connect this interpretation to Schroedinger's cat and the double ...
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Taking photos without photons? [closed]

I was looking up some science news and I came across this! Blind quantum camera snaps photos of Schrödinger’s cat http://www.sciencenews.org/article/blind-quantum-camera-snaps-photos-schr%C3%B6dinger%...
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Can we apply Quantum Superposition

Erwin Schrödinger’s famous thought experiment's video presented by Perimeter Institute for Theoretical Physics. From this video can we conclude that in a macroscopic level we can not have a ...