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m137
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15 votes
2 answers
2k views

Can two atoms be a crystal?

6 votes
3 answers
3k views

Normalisation of quantum states: why?

6 votes
3 answers
2k views

Eigenstates of the creation operator

5 votes
1 answer
575 views

Laser power and coherent state amplitude

4 votes
3 answers
302 views

How can we certify that the randomness in the measurement outcomes is not due to randomness in the state preparation?

3 votes
0 answers
162 views

Bogolyubov excitations in BEC

3 votes
2 answers
293 views

Propagation of mechanical waves in vacuum

3 votes
1 answer
295 views

Can we look further than the CMB?

3 votes
1 answer
75 views

Can I create squeezing with a $P^2$ interaction?

3 votes
0 answers
67 views

Bounding the value of a function for separable spin states

3 votes
3 answers
160 views

Can we measure the ground state energy?

2 votes
0 answers
266 views

Can an arbitrary spin state be written uniquely in a Dicke state basis?

2 votes
3 answers
87 views

Will August be always summer in the northern hemisphere?

2 votes
1 answer
241 views

From photon flux to number of photons inside a cavity

2 votes
1 answer
257 views

Coherent state under Kerr evolution

2 votes
0 answers
661 views

Local determinism vs. Local realism vs. Local causality

1 vote
1 answer
140 views

Non deterministic quantum gates

1 vote
0 answers
162 views

Derivation of Yurke-Stoler state

1 vote
0 answers
197 views

Non-quadratic kinetic energy [closed]

1 vote
0 answers
73 views

What is the physical interpretation of a Lagrangian with $\dot{x}^4$?

1 vote
0 answers
22 views

Relation between the boundedness and discreteness of conjugate operators

1 vote
0 answers
26 views

Displacement measurement in quantum optics

0 votes
1 answer
34 views

Heisenberg microscope for momentum

0 votes
0 answers
51 views

Definition of a rank-3 spin tensor operator?

0 votes
1 answer
192 views

Triplet states, Dicke states and symmetric spin-1 states

0 votes
0 answers
36 views

How far can we look into space?

0 votes
0 answers
119 views

two mode squeezed state in coherent state basis

0 votes
0 answers
92 views

Crookes radiometer showing radiation pressure

0 votes
1 answer
271 views

Number operator - annihilation operator commutation

0 votes
0 answers
55 views

Estimate $\langle ab^\dagger \rangle$ from $\langle a c^\dagger \rangle$ and $\langle c b^\dagger \rangle$