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Quantum Mechanics
Page 6
Questions (730)
8d. Now suppose we start with the qubit |ø(0)⟩=|0⟩ and we apply a magnetic field in the x^ direction at t=0. This
10 answers
asked by
Anonymous
482 views
An atom emits a photon of wavelength 1.08 meters. What is the energy change occurring in the atom due to this emission?
1 answer
asked by
gg
438 views
Suppose a particle has wavefunction ψ(x,t=0)=Aexp−(x^2/2l^2). What is the average value (expectation value) of p^,
1 answer
asked by
Judy
318 views
Can anyone help me to solve this problem?
Suppose we have a particle in 1-dimension, with wavefunction Ae^(−|x|2d). What is
1 answer
asked by
Judy
370 views
an electron inside spherical metallic particle of volume 10^ -12 metre cube has a kinetic energy about 10 eV. use uncertainty
1 answer
asked by
......
417 views
Consider a qubit subject to the Hamiltonian (1 4
4 1). Calculate the states of definite energy. What are the energies of these
1 answer
asked by
ss01
397 views
If you Fourier sample the state:
1/2√2(|000>−|001>+|010>−|011⟩+|100⟩−|101>+|110>−|111>), which of the following
1 answer
asked by
Anonymous
368 views
Suppose we have a quantum circuit that takes the input |0> and outputs |+>, and also takes the input |1> and outputs −|−>.
1 answer
asked by
SS01
478 views
If you Fourier sample the state 122√(|000>−|001>+|010>−|011>+|100>−|101>+|110>−|111>), which of the following states
25 answers
asked by
SS01
687 views
1] Let |ψ⟩=(2+i/3)|0>−(2/3)|1>. If we measure |ψ⟩ in the basis |u⟩=(1+i/2)|0>+(1−i/2)|1>,
7 answers
asked by
SS01
490 views
Suppose H|ψ> = 1/√2 (|000> + |111>). What is |ψ> ? Specify the probability amplitude for each component:
|000> = |001> =
1 answer
asked by
Ravi
493 views
If the first qubit is in the state √2/√3√|0>+1/√3|1> and the second qubit is in the state 1/√3|0>+√2/√3|1>, what
1 answer
asked by
SS01
328 views
et |ϕ⟩=a|0⟩+b|1⟩ where a and b are nonnegative real numbers. We know that if we measure |ϕ⟩ in the standard basis, the
1 answer
asked by
Anonymous
343 views
Assume that the double-slit experiment could be carried out with electrons using a slit spacing of b= 10.0 . To be able to
1 answer
asked by
Mouna
464 views
Consider the observable M that corresponds to a measurement in the sign basis where the measurement value is 3 if the outcome is
1 answer
asked by
qwerty
468 views
Consider a particle whose wavefunction at some fixed time t is represented by
-A if -2≤x≤0 ψ(x)= A if 0≤x≤3 0 otherwise
33 answers
asked by
qwerty
1,226 views
Suppose a particle has wavefunction ψ(x,t=0)=Ae^(−x^2/l^2). What is the average value (expectation value) of p, <p>, for this
1 answer
asked by
qwerty
373 views
Suppose we have a particle in 1-dimension, with wavefunction Ae^(−|x|/2d). What is the probability to find the particle in the
1 answer
asked by
qwerty
383 views
An electron of wavelength 1.74*10-10m strikes an atom of ionized helium (He+). What is the wavelength (m) of the light
1 answer
asked by
Echoes
458 views
- What is QFT6 of 1/√2(|0> + |3>?
- What is QFT6 of 1/√2(|1> + |4>? - What is QFT6 of 1/√3(|0> + |2> + |4>? - What is QFT6
37 answers
asked by
qwerty
729 views
What is the superposition that results if you apply the Hadamard transform H⊗n to the state 12√(|0n⟩+|1n⟩)? (Here,
1 answer
asked by
lana
287 views
What is the superposition that results if you apply the Hadamard transform H⊗n to the state 12√(|0n⟩+|1n⟩)? (Here,
1 answer
asked by
lana
342 views
What is the superposition that results if you apply the Hadamard transform H⊗n to the state 12√(|0n⟩+|1n⟩)?
5 answers
asked by
oye lucky
349 views
Suppose we are given a single qubit which is either in the state |u> = cos(pi/8) |0> + sin(pi/8) |1> or |v> = cos(3pi/8) |0> +
10 answers
asked by
qwerty
946 views
Why "In Hilbert Space noone can hear you scream"?
2 answers
asked by
Jess
522 views
Suppose H|ψ> = 1/√2 (|000> + |111>). What is |ψ> ? Specify the probability amplitude for each component:
|000> = |001> =
1 answer
asked by
qwerty
460 views
Suppose that a qubit is in the state |ψ> = a |0> + √ (1-a^2)|1> where a [-1,1] . If we first perform a standard basis
1 answer
asked by
qwerty
420 views
In the double-slit experiment, consider the point at the middle of the final (detector) screen which is equidistant from the two
2 answers
asked by
preshy
729 views
Suppose we have a qubit in the state |ψ⟩=12|0⟩+3√2|1⟩. If we measure this qubit in
1 answer
asked by
tribhu
1,049 views
We have a qubit in the state |ψ>= √3/2 |0>+ 1/2 |1>, which we want to measure in the {Cos θ |0> + Sin θ |1>, Sin θ |0> -
1 answer
asked by
qwerty
361 views
Caculate the wavelength of light emitted when each of the following transitions occur in the hydrogen atom.
A.) n=3->n=2 B.)
2 answers
asked by
Brenda
642 views
A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and
7 answers
asked by
p
449 views
The Zeeman effect is observed as a splitting in the spectral lines of hydrogen in the presence of a magnetic field. What is the
1 answer
asked by
henry
379 views
What is the velocity of an electron ejected, if any, from a piece of metal whose work function is 2.227 x 10^-19 J when a photon
1 answer
asked by
Emily
370 views
An electron drop to what energy level is likely to emit a photon in the infrared region?
3 answers
asked by
James
372 views
For an electron in a hydrogen atom, the z component of the angular momentum has a maximum value of Lz = 4.22 x 10-34 J·s. Find
1 answer
asked by
Beth
1,027 views
im not really understanding the question can someone please help me.
the energy difference between states A and B is twice the
2 answers
asked by
Jared
647 views
I don't get this problem! Please show work. Thanks!!
The de Broglie wavelength of a proton in a particle accelerator is 3.60 x
1 answer
asked by
Jessie
481 views
when a photon of energy hf elects an electro violently from an atom. How is this energy distribute in the process me electing
1 answer
asked by
euvin
316 views
λ for one line of the hydrogen spectrum is .4118 x 10-4 cm. Use this value in the Rydberg equation to calculate the RH value
2 answers
asked by
Adriana
746 views
The following combinations of quantam numbers are not allowerd
1. n=3 l=0 m=-1 2. n=4 l=4 m=0 Can someone explain to me why the
3 answers
asked by
Hero
385 views
3. An unknown element produces a spectral line of 425nm.
A. Calculate the energy of the emitted photon in joules. B. What is the
1 answer
asked by
suszan
952 views
Obtain an expression for the radiative lifetime in terms of the transition oscillator strength. Calculate the lifetime for a
3 answers
asked by
Physicst
355 views
What is the electrons velocity that made its momentum equal to the momentum of photon whose wave length 5200A?
1 answer
asked by
dany
407 views
Derive an expression for number of electrons N(E) with energy that can escape from a metal in terms of Z(E) (density of state)
1 answer
asked by
John
458 views
Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of the following.
a 1.32-mg mosquito moving
1 answer
asked by
Karina
447 views
Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of the following.
a 1.32-mg mosquito moving
1 answer
asked by
Karina
457 views
Find the normalization constant for the wave function (e^-bx).(e^+bx)(one dimension)
1 answer
asked by
quaffi
353 views
What kind of experiment might you use to distinguish between a gamma ray of wavelength 10^-11m and an electron whose de Brogile
2 answers
asked by
Brann
1,029 views
If Planck's constant were smaller than it is, would quantum phenomena be more or less conspicuous than they are now?
1 answer
asked by
Brann
1,187 views
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