Questions tagged [spin]
7 questions
4
votes
0 answers
Is the Bloch sphere the same as the electron spin?
A single qubit is represented with a bloch sphere and implemented on an electron with only two energy values from lots of them.
So, I am confused about why an energy range is represented as a vector on a sphere, and also with the relation between…
Luis ALberto
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2
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1 answer
Interpreting Spin Outcomes in Figure 1.7 of Quantum Computing for Everyone
In reference to Figure 1.7 of $\textit{Quantum Computing for Everyone}$ by Chris Bernhardt (attached below), the book states:
..., both situations depicted in Figure 1.7 represent an electron having
spin N in the $0^\circ$ direction, or…
phy_std
- 161
- 3
1
vote
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The X-Y Hamiltonian with Jordan-Wigner Transformation
While exploring the Hamiltonian of the x-y model within the framework of quantum mechanics, I encountered the following transformation using the Jordan-Wigner transformation (JWT):
\begin{align}
H_{xy} &= -J \sum_{j} S_j ^+ S_{j+1} ^- + S_j ^+…
amirhoseyn Asghari
- 115
- 3
1
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Transforming spin operators into fermionic operators and finding their anticommutation relations
The Jordan-Wigner transformation (JWT) is a method used in quantum mechanics to map spin operators, which are typically associated with spin-1/2 particles, to fermionic operators, which describe fermions such as electrons. This transformation is…
amirhoseyn Asghari
- 115
- 3
1
vote
1 answer
How to create a electron in a superpositon?
I am trying to understand how are qubits created and implemented in real life. I was unable to find much information about how electrons are kept or sent into a superposition of our wish which is of course a basic need to implement any quantum…
Dhanush Sai Baswa
- 37
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1
vote
1 answer
What is the optimal hardware for quantum computing, and what factors contribute to its preference?
In conventional computing, the use of CMOS (Complementary Metal Oxide Semiconductor) technology as the foundational circuitry for digital logic gates in CPUs has become the industry norm. CMOS's remarkable success can be attributed to its impressive…
Max
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0
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How to write the three-qubit Hamiltonian describing XXX Heisenberg interaction between $B,C$ and $A$ interacting with both $B$ and $C$?
Suppose there are three particles: A, B, and C. Particles B and C are subjected to XXX Heisenberg interaction, while the spin of particle A interacts with both B and C. then we have:
$
H_{BC} = J_x \sigma_B^x \sigma_C^x + J_y \sigma_B^y \sigma_C^y +…
reza
- 817
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