Questions tagged [teleportation]
Quantum teleportation is a process by which quantum information (e.g. the exact state of an atom or photon) can be transmitted (exactly, in principle) from one location to another, with the help of classical communication and previously shared quantum entanglement between the sending and receiving location. (Wikipedia)
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Single bit teleportation for Hadamard gate
The circuit in Figure 13.7 of Gottesman's book https://www.cs.umd.edu/class/spring2024/cmsc858G/QECCbook-2024-ch1-15.pdf
shows how to take the magic state $ T | + \rangle $ and use single bit gate ...
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In quantum teleportation, why does measuring entanglement not destroy the whole state?
In quantum teleportation, we have three qubits. Sender, receiver and ancillary. First, we entangle the ancillary and target qubit. Next, we entangle ancillary and sender qubits. Now, the whole system ...
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Can we perform teleported-error-correction with noisy Bell pairs?
It is well-known that in https://arxiv.org/abs/quant-ph/0312190 that error correction can be performed by teleportation on the logical level, so prepare one logical Bell pair and (logical?) Bell ...
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How does quantum teleportation not lose information?
This may be a bit of an elementary question, but I think understanding it will help me understand fundamentally what makes quantum algorithms a bit magical.
Alice starts with a message she wants to ...
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Teleportation of Transversal Hadamard Gate from the $[[8,3,2]]$ to $[[4,2,2]]$ codes
I'm trying to understand the circuit from Appendix A of the paper Fault-Tolerant One-Bit Addition with the Smallest Interesting Colour Code.
Here the top 3 qubits represent the 3 logical qubits of ...
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Why does this not break the security of quantum teleportation
Reposted from my post on the physics stack exchange, apparently this is a better place.
I am taking an course on quantum mechanics, and we have just encountered the quantum teleportation protocol that ...
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quantum teleportation with shared state and teleported state in bloch representation
Suppose that two parties (Alice and Bob) share an entangled state
$$ \rho_F = F \lvert \phi^+ \rangle \langle \phi^+ \rvert + \frac{1-F}{3} \left( I \otimes I - \lvert \phi^+ \rangle \langle \phi^+ \...
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Quantum teleportation of unknown qubit when the entangled state is not a Bell state
Assume Bob and Alice have two particles with a prior entanglement: $A$ and $B$. The entangled state $|Ψ⟩$ is maximally entangled, and $$|Ψ⟩ = \frac{1}{\sqrt{2}}(|00⟩ + j|11⟩)\,,$$ where $j$ is a ...
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2-Qubit Gate Teleportation with 1 Maximally Entangled State for Distributed Computation
$\newcommand{\ket}[1]{|#1\rangle}$
I search for quantum circuits/protocols that enable distributed quantum computation of a 2-qubit gate using gate teleportation.
Let me explain the desired scenario ...
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What is the difference between quantum teleportation and quantum entanglement with dense coding?
What is the actual difference between quantum teleportation and quantum entanglement with dense coding.
Wikipedia says:
Quantum teleportation is a technique for transferring quantum information from ...
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Phase shift on qiskit quantum teleportation simulation
I wonder in Qiskit why the phase shift occurred in my simulation and how I can turn it off.
I posted another question regarding the same simulation here, and while I tried to solve this on my own, I ...
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Does Bob know the state of the qubit Alice teleported after the completion of the teleportation protocol?
Notation: $|\text{Alice}_{1\,\,}\text{Alice}_{2\,\,}\text{Bob}_{1}\rangle$
Alice and Bob shared an entangled state, say a Bell state $| \Phi_{+}\rangle = \frac{1}{\sqrt{2}}\bigg[|00\rangle + |11\...
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Why is a Bell state involved in quantum teleportation?
Notation: $|\text{qubit}_{1}, ..., \text{qubit}_{N}\rangle$.
The goal of quantum teleportation is to send quantum information using classical bits.
A source transmits a state $|\psi\rangle_{A_{0}} = \...
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$CNOT$ teleportation in ZX-calculus: how to simplify my circuit further?
I am stuck in simplyfing the following cNOT teleportation in ZX-calculus. I don't know how to proceed further. The circuit I start from is taken from this thesis (Fig 2.14, page 22).
Which property ...
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Can quantum teleportation be used to break BB84?
BB84 is a key quantum distribution scheme, which is supposed to be "provably secure" and resistant to an individual eavesdropper. However, from what I can tell, is seems as if one could ...
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