Quantum Computing Stack Exchange
Quantum Computing Stack Exchange

Questions tagged [superdense-coding]

Superdense coding is quantum communication protocol that transmits 2 classical bits of information by sending 1 qubit, provided sender and receiver pre-shared entangled pair of qubits.

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What are the real advantages of superdense coding?

In superdense coding, two qubits are prepared by Eve in an entangled state; one of them is sent to Alice and the other is sent to Bob. Alice is the one who wants to send (to Bob) two classical bits of information. Depending on what pair of classical…
user72
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What is the applicability of quantum network coding?

As the title suggests, I want to know what the applicability of quantum network coding is, besides the EPR pair construction between distant pairs of 'Users-Targets'. Can quantum network coding be used for computation?
Ivanovitch
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Does superdense coding allow to double the information capacity of a set of qubits?

I read the basic introductory information about qubits on Wikipedia: There are two possible outcomes for the measurement of a qubit—usually 0 and 1, like a bit. The difference is that whereas the state of a bit is either 0 or 1, the state of a…
Kaspar Siricenko
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Can superdense coding be made more efficient?

Superdense encoding allows us to transmit the information of two classical bits using a single qubit with a pre-shared Bell state qubit pair. We can duplicate the construct to transmit $2n$ classical bits using $n$ qubits. My question is: can we do…
czwang
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What is the practical interest of superdense coding?

When you enter the field of quantum communications, you run at some point into the concept of superdense coding. Basically it is a way to encode classical bits on the qubits of a quantum channel, which sounds interesting in the first place to…
Mathias
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In what ways can qubits be used for applications that do not require entanglement?

Many good questions on this site have explored how entanglement lies at the boundary between the quantum world and the classical. For example in computational speedups, or teleportation or superdense coding, at least two qubits are entangled in some…
Mark Spinelli
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Controlling high-dimensional Hilbert spaces with a single qubit

In superdense coding, you can use one qubit to control the Hilbert space of two qubits and steer it into 4 mutually orthogonal states, so that measurement of both qubits together will not have a probabilistic outcome. I think the idea is cool. I…
psitae
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Why is super-dense coding called the inverse of quantum teleportation?

I am new to quantum computation and I recently came across the statement that super-dense coding can be called the inverse of quantum teleportation
Aleph
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Does 1 qubit correspond to 2 bits?

In a lot of presentation I always see people say that $n$ qbit are approximately $2^n$ classical bit. Those talks where oriented for a broad audience, so they left out a lot of things. Deep down I felt that this couldn't be possible, but I didn't…
malloc
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Superdense coding circuit returns wrong result

I'm new to quantum computing, but everything I've read about superdense coding claims that, in the circuit below, Bob should receive a $[01\rangle$ from Alice. Unfortunately, that's not what I get I run the above circuit in either Qiskit or…
Richard Hensh
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Are superdense coding and teleportation just a prototype or the 'only' type?

I am interested to know if models in quantum mechanics and techniques like superdense coding teleportation are just single cases where they were found to work. Or rather just a prototype of many other examples of similar things. What I mean is, the…
bilanush
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What does it look like to split an EPR pair?

I am reading Quantum Computation and Quantum Information by Michael A. Nielsen & Isaac L. Chuang, and I am confused about a concept presented in Section 1.3.7: Quantum Teleportation. The book writes "While together, Alice and Bob generated an EPR…
MathStudent1324
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Eavesdropping in superdense coding: why can't the third party infer anything about the message?

There's an exercise in Nielsen & Chuang asking us to show that if some third party intercepts Alice's qubit she's sending to Bob while attempting to transmit (2 bits of) classical information, then this third party can't actually infer anything…
Rourke Sekelsky
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How we can describe entanglement from measurement and resource perspectives?

When we read books on quantum computing and information theory, specifically in entanglement we find some distinguishability between those who focus on entanglement as a resource or use it as an application to explain some phenomenons…
EnthusiastiC
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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 a sender at one location to a receiver some…
Physiclá
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