One-way quantum computer¶

The one-way quantum computer, also known as measurement-based quantum computer (MBQC), is a method of quantum computing that first prepares an entangled resource state, usually a cluster state or graph state, then performs single qubit measurements on it.

Version: v1 · 2026-09-28 · History
Domain-specific #: 11098
Domain group: Applied Sciences & Engineering
Origin domain: Computer Science & Software Engineering
Subdomains: Quantum Computing, Measurement Based Quantum Computation → Computer Science & Software Engineering

Core Idea¶

One-way quantum computer is treated here as the recurring computing and information systems identity summarized by this source-grounded definition: The one-way quantum computer, also known as measurement-based quantum computer (MBQC), is a method of quantum computing that first prepares an entangled resource state, usually a cluster state or graph state, then performs single qubit measurements on it.

The one-way quantum computer, also known as measurement-based quantum computer (MBQC), is a method of quantum computing that first prepares an entangled resource state, usually a cluster state or graph state, then performs single qubit measurements on it. It is "one-way" because the resource state is destroyed by the measurements. The outcome of each individual measurement is random, but they are related in such a way that the computation always succeeds.

In general, the choices of basis for later measurements need to depend on the results of earlier measurements, and hence the measurements cannot all be performed at the same time. The implementation of MBQC is mainly considered for photonic devices, due to the difficulty of entangling photons without measurements, and the simplicity of creating and measuring them. However, MBQC is also possible with matter-based qubits.

For One-way quantum computer, the abstraction is narrower than the article's general subject matter: a positive case must preserve The one-way quantum computer, also known as measurement-based quantum computer (MBQC), is a method of quantum computing that first prepares an entangled resource state, usually a cluster state or graph state, then performs single qubit measurements on it. Retaining only the name, a familiar example, or a downstream effect is insufficient. The specialist roles and tests remain anchored in computing and information systems, which is why this identity is domain-specific rather than prime.

Structural Signature¶

Sig role-phrases:

Defining carrier — A quantum circuit is formed by a register of qubits on which unitary transformations are applied over the qubits.
Constitutive relation — The standard process of measurement-based quantum computing consists of three steps: entangle the qubits, measure the ancillae (auxiliary qubits) and correct the outputs.
Operating condition — Thereafter, the entanglement between two qubits can be performed by applying a (Controlled) CZ gate operation.
Recognition evidence — The process of measurement over a single-particle state can be described by projecting the state on the eigenvector of an observable.
Admissible variation — The entangling operations E_{ij} between the qubits can be performed by the CZ gates.
Characteristic consequence — The one-way quantum computer allows the implementation of a circuit of unitary transformations through the operations of entanglement and measurement.
Failure boundary — Such operations can be performed time by time for any logic gate in the circuit, or rather in a pattern which allocates all the entanglement operations at the beginning, the measurements in the middle and the corrections at the end of the circuit.

What It Is Not¶

Not the whole field of computing and information systems. The node requires the specific identity stated by The one-way quantum computer, also known as measurement-based quantum computer (MBQC), is a method of quantum computing that first prepares an entangled resource state, usually a cluster state or graph state, then performs single qubit measurements on it.
Not an over-broad reading. However, the measurement outputs are non-deterministic result, due to undetermined nature of quantum mechanics: in order to carry on the computation in a deterministic way, some correction operators, called byproducts, are introduced.
Not an over-broad reading. At the beginning of the computation, the qubits can be distinguished into two categories: the input and the ancillary qubits.
Not an over-broad reading. Due to the probabilistic outcome of measurements, the system is not set in a deterministic way: after a measurement on the X - Y plane, the output may change whether the outcome had been | \theta_+ \rangle or | \theta_- \rangle .
Not automatically Quantum Computing. Retrieval proximity does not establish equivalence; the two identities must be compared by carrier, operation, and failure boundary.

Scope of Application¶

One-way quantum computer applies literally inside computing and information systems wherever the source-defined carrier and relation can be established. Its documented habitats include:

Preparing the source state. Photons are the most common qubit system that is used in the context of one-way quantum computing.
Preparing the source state. Furthermore, quantum emitters such as atoms or quantum dots can be used to create deterministic entanglement between photonic qubits.
Correcting the output. Eventually, even though the outcome of a measurement is not deterministic in quantum mechanics, the results from measurements can be used in order to perform corrections, and carry on a deterministic computation.
Equivalence between quantum circuit model and MBQC. The one-way quantum computer allows the implementation of a circuit of unitary transformations through the operations of entanglement and measurement.
Hardware and applicationsTopological cluster state quan. Measurement-based computation on a periodic 3D lattice cluster state can be used to implement topological quantum error correction.
Implementations. Cluster states have also been created in optical lattices, but were not used for computation as the atom qubits were too close together to measure individually.

Outside computing and information systems, the name should be retained only when these same operational conditions survive; otherwise the comparison belongs to the broader parent Pattern or should be marked as analogy.

Clarity¶

A clear use of One-way quantum computer names the carrier, the operative relation, and the conditions under which the source treats the identity as present. The minimal definition is The one-way quantum computer, also known as measurement-based quantum computer (MBQC), is a method of quantum computing that first prepares an entangled resource state, usually a cluster state or graph state, then performs single qubit measurements on it. The strongest recognition evidence in the frozen account is: The process of measurement over a single-particle state can be described by projecting the state on the eigenvector of an observable. A report should distinguish that evidence from a proxy, consequence, or common implementation. It should also state the qualification However, the measurement outputs are non-deterministic result, due to undetermined nature of quantum mechanics: in order to carry on the computation in a deterministic way, some correction operators, called byproducts, are introduced. so that a reader can reproduce the classification rather than infer it from topical resemblance.

Manages Complexity¶

One-way quantum computer compresses multiple computing and information systems details into a stable diagnostic relation. The source shows both the central mechanism—the standard process of measurement-based quantum computing consists of three steps: entangle the qubits, measure the ancillae (auxiliary qubits) and correct the outputs.—and the practical consequence—the one-way quantum computer allows the implementation of a circuit of unitary transformations through the operations of entanglement and measurement. This compression makes cases comparable while leaving parameters, conventions, exceptions, and evidential quality explicit. It is lossy by design: local history and implementation details may be omitted only when they do not alter the defining relation.

Abstract Reasoning¶

Type the carrier. Identify the computing and information systems entities to which the claim applies.
State the relation. Use the source-grounded identity: The one-way quantum computer, also known as measurement-based quantum computer (MBQC), is a method of quantum computing that first prepares an entangled resource state, usually a cluster state or graph state, then performs single qubit measurements on it.
Check operation and conditions. Thereafter, the entanglement between two qubits can be performed by applying a (Controlled) CZ gate operation.
Demand recognition evidence. The process of measurement over a single-particle state can be described by projecting the state on the eigenvector of an observable.
Test variation. Change an implementation or setting while preserving the entangling operations E_{ij} between the qubits can be performed by the CZ gates.
Run the collapse test. Remove the defining operation; if the label still seems equally apt, only a topic or correlate was retained.
Reduce cautiously. When the specialist conditions cannot be carried, route the residual comparison to Pattern.

Knowledge Transfer¶

Within the home domain. Knowledge about One-way quantum computer transfers literally when a new case preserves the same carrier type, relation, and recognition test. Photons are the most common qubit system that is used in the context of one-way quantum computing. Furthermore, quantum emitters such as atoms or quantum dots can be used to create deterministic entanglement between photonic qubits.

Beyond the home domain. No canonical parent is asserted for One-way quantum computer. An outside case receives the specialist name only when the same typed roles and rejection conditions can be filled literally; otherwise the comparison remains an analogy pending later graph densification.

Examples¶

Canonical¶

For example, the sign in front of the angle of measurement on the j -th qubit can be flipped with respect to the measurement over the i -th qubit: in such case, the notation will be written as [M_j^{\theta_2}] , and therefore the two operations of measurement do commute each other no more. This case is canonical because it supplies a concrete carrier and lets the defining relation be checked rather than merely named.} M_i^{\theta_1

Mapped back: carrier → the entities in the documented case; operation → The one-way quantum computer, also known as measurement-based quantum computer (MBQC), is a method of quantum computing that first prepares an entangled resource state, usually a cluster state or graph state, then performs single qubit measurements on it; recognition evidence → The process of measurement over a single-particle state can be described by projecting the state on the eigenvector of an observable

Applied / In Practice¶

Therefore, probabilistic entangling gates such as Bell state measurements are typically considered. The applied case shows how the identity is used under a second setting or qualification while keeping the same operative relation.

Mapped back: changed setting → Preparing the source state; invariant → The one-way quantum computer, also known as measurement-based quantum computer (MBQC), is a method of quantum computing that first prepares an entangled resource state, usually a cluster state or graph state, then performs single qubit measurements on it; boundary → the case exits the class when however, the measurement outputs are non-deterministic result, due to undetermined nature of quantum mechanics: in order to carry on the computation in a deterministic way, some correction operators, called byproducts, are introduced

Structural Tensions¶

T1 — Stable identity versus admissible variation. However, the measurement outputs are non-deterministic result, due to undetermined nature of quantum mechanics: in order to carry on the computation in a deterministic way, some correction operators, called byproducts, are introduced. The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: Which changes preserve the defining relation, and which replace it?

T2 — Recognition versus proxy. At the beginning of the computation, the qubits can be distinguished into two categories: the input and the ancillary qubits. The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: Does the cited evidence establish the identity or only a correlated sign?

T3 — Definition versus implementation. Due to the probabilistic outcome of measurements, the system is not set in a deterministic way: after a measurement on the X - Y plane, the output may change whether the outcome had been | \theta_+ \rangle or | \theta_- \rangle . The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: Is the observed implementation constitutive, optional, or merely common?

T4 — Scope versus overextension. Eventually, even though the outcome of a measurement is not deterministic in quantum mechanics, the results from measurements can be used in order to perform corrections, and carry on a deterministic computation. The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: Can every claimed application fill the same typed roles without metaphor?

T5 — Transfer versus domain accent. A quantum circuit is formed by a register of qubits on which unitary transformations are applied over the qubits. The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: Does the receiving case instantiate One-way quantum computer literally, co-instantiate Pattern, or only resemble it?

T6 — Autonomy versus reduction. The standard process of measurement-based quantum computing consists of three steps: entangle the qubits, measure the ancillae (auxiliary qubits) and correct the outputs. The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: What does One-way quantum computer distinguish that the broader parent Pattern leaves together?

Structural–Framed Character¶

One-way quantum computer is mixed or framed-leaning. Its structural side is the repeatable organization summarized by The one-way quantum computer, also known as measurement-based quantum computer (MBQC), is a method of quantum computing that first prepares an entangled resource state, usually a cluster state or graph state, then performs single qubit measurements on it. Its framed side is the computing and information systems vocabulary that fixes the carrier, evidence, exceptions, and admissible transformations.

Evaluative weight: the identity can be stated descriptively even when applications carry practical stakes. Human-practice dependence: the source-grounded carrier determines whether the relation exists independently or is constituted by a practice. Institutional origin: disciplinary conventions stabilize the name and test. Vocabulary portability: Thereafter, the entanglement between two qubits can be performed by applying a (Controlled) CZ gate operation. Import versus recognition: literal transfer requires the same mechanism; shape alone is analogy.

Its portable skeleton is Pattern. Its character: a recurring specialist identity whose thin organization can be abstracted, while its operational meaning remains domain-bound.

Structural Core vs. Domain Accent¶

What is skeletal. The one-way quantum computer, also known as measurement-based quantum computer (MBQC), is a method of quantum computing that first prepares an entangled resource state, usually a cluster state or graph state, then performs single qubit measurements on it. The stable skeleton is the typed relation expressed in that definition and the entry's recognition and collapse tests. The source identifies these operative conditions: A quantum circuit is formed by a register of qubits on which unitary transformations are applied over the qubits. The standard process of measurement-based quantum computing consists of three steps: entangle the qubits, measure the ancillae (auxiliary qubits) and correct the outputs. It further constrains recognition and variation through: Thereafter, the entanglement between two qubits can be performed by applying a (Controlled) CZ gate operation. The process of measurement over a single-particle state can be described by projecting the state on the eigenvector of an observable.

What is domain-bound. computing and information systems supplies the operative entities, technical vocabulary, warrants, and exceptions that make One-way quantum computer literal. Its documented scope includes the condition that Photons are the most common qubit system that is used in the context of one-way quantum computing. Another bounded application condition is that Furthermore, quantum emitters such as atoms or quantum dots can be used to create deterministic entanglement between photonic qubits. These are not decorative examples; they determine which carrier and evidence can fill the abstraction's roles.

Why no parent is asserted. Removing those specialist details does not currently yield one live catalog node that is a necessary genus for every instance. The entry is therefore approved as unparented rather than attached by topical resemblance. Its collapse evidence remains specific—The entangling operations E{ij} between the qubits can be performed by the CZ gates.—and future graph densification may discover a defensible relation only if it preserves that boundary.

Approved unparented node. No current live node supplies a defensible necessary genus or structural prerequisite for One-way quantum computer. The reviewed identity is: The one-way quantum computer, also known as measurement-based quantum computer (MBQC), is a method of quantum computing that first prepares an entangled resource state, usually a cluster state or graph state, then performs single qubit measurements on it. The accelerated suggestion was declined because topical or lexical similarity does not establish hierarchy; the node is admitted without a parent pending later graph densification.
Related reasoning operations. Evidence, representation, comparison, classification, transformation, or evaluation may participate in particular cases, but participation does not make any one of them a necessary parent of every instance.

Neighborhood in Abstraction Space¶

One-way quantum computer sits in a moderately populated region (55^th percentile for distinctiveness): it has near-neighbors but no dense thicket of look-alikes.

Family — Quantum States & Information Measures (25 abstractions)

Nearest neighbors

Computed from structural-signature embeddings · 2026-10-08

Not to Be Confused With¶

Pattern. The parent omits the specialist differentia. Tell: Can the case establish The one-way quantum computer, also known as measurement-based quantum computer (MBQC), is a method of quantum computing that first prepares an entangled resource state, usually a cluster state or graph state, then performs single qubit measurements on it?
Quantum Computing. A computational paradigm that encodes and transforms information in controlled quantum states and extracts classical outcomes through measurement under a declared algorithmic model. Tell: Which entry's carrier, operation, and failure condition are satisfied?
Linear optical quantum computing. Paradigm of quantum computer. Tell: Which entry's carrier, operation, and failure condition are satisfied?
Algorithmic qubits. A vendor-introduced quantum-computer benchmark reporting the largest circuit width whose implementation passes a suite of application-oriented algorithm tests under specified fidelity thresholds. Tell: Which entry's carrier, operation, and failure condition are satisfied?
A measurement, proxy, or consequence. Those may provide evidence without being the identity. Tell: Would One-way quantum computer remain present if the detector or downstream effect changed?
A metaphorical analogue. A similar shape outside computing and information systems lacks the specialist mechanism. Tell: Do the native roles transfer literally, or only the parent Pattern?

References¶

Frozen Wikipedia discovery revision: https://en.wikipedia.org/wiki/One-way_quantum_computer (revision 1369642254).
Preserved source candidate: https://dl.acm.org/doi/10.5555/2011804.2011805
Preserved source candidate: https://iopscience.iop.org/article/10.1088/1367-2630/9/6/199
Preserved source candidate: http://nozdr.ru/data/media/biblio/kolxoz/M/ICM-1998,%20Berlin.%20Proceedings,%20Vol.%201%20Plenary%20lectures%20(no%20p.%2023-52)%20(Documenta%20Mathematica,%201998)(660s)M.pdf#page=434
Preserved source candidate: https://web.archive.org/web/20220318140343/http://nozdr.ru/data/media/biblio/kolxoz/M/ICM-1998%2C%20Berlin.%20Proceedings%2C%20Vol.%201%20Plenary%20lectures%20%28no%20p.%2023-52%29%20%28Documenta%20Mathematica%2C%201998%29%28660s%29_M_.pdf#page=434
Preserved source candidate: https://static.epcc.ed.ac.uk/dissertations/hpc-msc/2009-2010/Einar%20Pius.pdf
Preserved source candidate: https://qiskit.org/documentation/stubs/qiskit.quantum_info.OneQubitEulerDecomposer.html
Preserved source candidate: https://qml.baidu.com/tutorials/measurement-based-quantum-computation/mbqc-quick-start-guide.html
Preserved source candidate: https://qml.baidu.com/tutorials/measurement-based-quantum-computation/measurement-based-quantum-computation-module.html

The frozen Wikipedia revision is discovery provenance. The retained source set was reviewed for identity, formal or operational relation, and scope. The encyclopedia's structural synthesis is bounded to those claims; a thin authority surface is recorded as a nonblocking source-strengthening repair rather than concealed.