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COMPANY RESEARCH · Networking

EPB Quantum Network

Lets developers test quantum-network components on maintained metropolitan fiber without first building their own testbed.

Official website ↗
United States · Research reviewed 7 Sept 2026

Initial record: initial assessment recorded.

Review history 1 record

Record dates use UTC and show when an assessment or clarification was saved. Review dates show the evidence check. Earlier records were recovered from QubitWire’s source history; no earlier score movement is inferred.

Identity & attribution
Organization record
EPB Quantum Network (organization-094)
Recorded role
Commercial fiber testbed for quantum-network development
Recorded aliases
No aliases recorded in this assessment.
Name and period
No dated name or ownership transition is recorded here. An alias is a search aid, not evidence of a legal ownership relationship.
Product scope
Reconfigurable deployed-fiber network with photon sources, detectors, timing and polarization control.

A company profile may discuss several systems. Capabilities remain attached to the product and conditions named in each source; they do not transfer automatically to related organizations. A verified security relationship has not been attached to this record.

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TECHNOLOGY & ACCESS

What it does. Where it fits.

Reconfigurable deployed-fiber network with photon sources, detectors, timing and polarization control.

Who should look closer

Photonics teams seeking staffed field tests, equipment interoperability work and network characterization.

QubitWire’s editorial assessment of practical fit.

Contracted hourly or annual access

EPB offers staffed workspace and configurable network time through direct booking. Availability and project requirements are agreed with the operator.

Check the current access route ↗
DOCUMENTED EVIDENCE

What the sources establish

An ORNL/UTC campaign used EPB links to maintain polarization control for over 30 hours. The paper reports 0.94 ± 0.03 relative fidelity, while ORNL identifies the short metropolitan links and collaborating sites.

ornl.gov ↗impact.ornl.gov ↗

What remains unresolved

This assessment covers the network testbed, not the planned computing facility. One research campaign does not establish an all-purpose quantum internet or a commercial uptime guarantee.

The next question to watch

Can further deployments report longer operating periods, changing loss conditions and independently reproduced multi-vendor workloads?

A research question, not a promised milestone.

QubitWire coverage

No published QubitWire stories currently match this organization. The evidence sources below provide the starting point.

Open research questions

Editorial questions for this profile. No reviewed closure decision has been recorded; unanswered questions do not lower the official score.

Open research question

Can further deployments report longer operating periods, changing loss conditions and independently reproduced multi-vendor workloads?

What evidence would help

A source addressing this question must identify the named system, experiment or deployment, its conditions, measured outcome and remaining limitations. What distance, loss, fidelity and useful rate were demonstrated together?

What would resolve it?

An editorial review must explain which part of this question the evidence resolves. A roadmap or an announcement alone does not close it.

No resolved, partial or disputed outcome is asserted without a reviewed transition and its evidence.

Suggest evidence
Open research question

Which named system or service can I use under the documented access route?

What evidence would help

Check the current terms for contracted hourly or annual access. Identify the system version, eligibility, restrictions and whether the result used hardware or simulation.

What would resolve it?

Current primary documentation must identify the offering, eligible user and access conditions. An unspecified company-level access claim is insufficient.

No resolved, partial or disputed outcome is asserted without a reviewed transition and its evidence.

Suggest evidence
Open research question

Is this a deployed network, a field trial or a laboratory link?

What evidence would help

Provide the source location, relevant product or generation, workload, resource constraints and reported uncertainty. Keep measurements, simulations and announced targets distinct.

What would resolve it?

A source reviewer must map the evidence to this exact scope. Missing disclosure remains unknown; it is not technical failure.

No resolved, partial or disputed outcome is asserted without a reviewed transition and its evidence.

Suggest evidence

Questions are drawn from the existing brief and sector reading guide. Research brief reviewed 7 Sept 2026. Following stores a local bookmark; it does not send email alerts or imply a scheduled review.

Since your review

Scope: EPB Quantum Network. Reading a page never marks its records reviewed.

Keep a baseline and explicitly mark the evidence you have reviewed. This optional journal stays in this browser.

Existing material records remain available after setup. Routine rechecks and initial entries are excluded from material counts.

Public 7-day, 30-day & full history →

From claim to assessment

These are the existing assessment claims and their recorded criterion links. A source link is not an independent replication. New research does not change these published ratings automatically.

Source references in method 1.0 · assessment reviewed 7 Sept 2026
Recorded claim & sourceAssessment linkageProvenance & limits
Source 1

EPB describes a staffed, reconfigurable fiber testbed with entangled-photon sources, timing, detectors and switches; hourly access and annual contracts are offered.

EPB Quantum Network access and configurations ↗Published Not recorded
Exact source location

No page, figure or section locator is recorded. Open the source and check the claim in its original context.

Delivery

The operator offers available hourly and annual network access, with staffing and configuration details.

Integration

The deployed experiment connects a university node, external photon source and polarization-control equipment to EPB fiber.

Published rating inputs remain unchanged.		Organization-originated source

Source type: Operator service documentation. Independent replication, experiment date and source-version fingerprint are not separately recorded.

Product and measurement scope: read the named system and conditions in this claim. No normalized product revision is assigned.

Review recorded 7 Sept 2026. Research brief reviewed 7 Sept 2026. These dates do not establish publication or experiment dates.

Report an issue with this claim →
Source 2

ORNL reports a joint field experiment maintaining entangled-signal transmission for over 30 hours between UTC and two EPB nodes, each about half a mile away. This is research-partner reporting.

ORNL partnership with EPB tests new method for protecting quantum networks ↗Published 13 Jan 2025
Exact source location

No page, figure or section locator is recorded. Open the source and check the claim in its original context.

Capability

A joint research campaign reports more than 30 hours of operation on deployed links with defined relative-fidelity measurement.

Use in practice

ORNL and UTC report actual use of the testbed for their stabilization research; this is partner evidence.

Integration

The deployed experiment connects a university node, external photon source and polarization-control equipment to EPB fiber.

Published rating inputs remain unchanged.		Organization-originated source

Source type: National-laboratory research-partner report. Independent replication, experiment date and source-version fingerprint are not separately recorded.

Product and measurement scope: read the named system and conditions in this claim. No normalized product revision is assigned.

Review recorded 7 Sept 2026. Research brief reviewed 7 Sept 2026. These dates do not establish publication or experiment dates.

Report an issue with this claim →
Source 3

The peer-reviewed study reports metropolitan-network polarization stabilization with average relative fidelity 0.94 ± 0.03 over more than 30 hours. Relative fidelity is not an absolute entangled-state fidelity or a service guarantee.

Continuous automatic polarization channel stabilization from heterodyne detection of coexisting dim reference signals ↗Published 16 Dec 2024
Exact source location

No page, figure or section locator is recorded. Open the source and check the claim in its original context.

Capability

A joint research campaign reports more than 30 hours of operation on deployed links with defined relative-fidelity measurement.

Use in practice

ORNL and UTC report actual use of the testbed for their stabilization research; this is partner evidence.

Integration

The deployed experiment connects a university node, external photon source and polarization-control equipment to EPB fiber.

Published rating inputs remain unchanged.		Organization-originated source

Source type: Peer-reviewed research-partner paper. Independent replication, experiment date and source-version fingerprint are not separately recorded.

Product and measurement scope: read the named system and conditions in this claim. No normalized product revision is assigned.

Review recorded 7 Sept 2026. Research brief reviewed 7 Sept 2026. These dates do not establish publication or experiment dates.

Report an issue with this claim →
Source 4

The operator labels its quantum network available now and separately describes quantum computing facilities as coming in 2026; the two access claims must not be conflated.

EPB Quantum facilities and availability ↗Published Not recorded
Exact source location

No page, figure or section locator is recorded. Open the source and check the claim in its original context.

Delivery

The operator offers available hourly and annual network access, with staffing and configuration details.

Published rating inputs remain unchanged.		Organization-originated source

Source type: Operator availability statement. Independent replication, experiment date and source-version fingerprint are not separately recorded.

Product and measurement scope: read the named system and conditions in this claim. No normalized product revision is assigned.

Review recorded 7 Sept 2026. Research brief reviewed 7 Sept 2026. These dates do not establish publication or experiment dates.

Report an issue with this claim →
Revision and evidence-family boundaries

Record reference: 7ef8cca0f7a5f80823d7e69a587fa16497a134179696cec6137ef57cf5e82f0d. Read prior recorded revisions.

Repeated coverage can describe the same experiment. The assessment does not contain a reviewed claim-family grouping, so the number of links is never shown as a replication count. Source pages can change independently of this saved assessment; the original source text is not archived here.

CHECK THE ORIGINALS

Sources & evidence

  1. EPB Quantum Network access and configurations ↗Organization-originated source · Publication date not stated

    EPB describes a staffed, reconfigurable fiber testbed with entangled-photon sources, timing, detectors and switches; hourly access and annual contracts are offered.

  2. ORNL partnership with EPB tests new method for protecting quantum networks ↗Organization-originated source · 13 Jan 2025

    ORNL reports a joint field experiment maintaining entangled-signal transmission for over 30 hours between UTC and two EPB nodes, each about half a mile away. This is research-partner reporting.

  3. Continuous automatic polarization channel stabilization from heterodyne detection of coexisting dim reference signals ↗Organization-originated source · 16 Dec 2024

    The peer-reviewed study reports metropolitan-network polarization stabilization with average relative fidelity 0.94 ± 0.03 over more than 30 hours. Relative fidelity is not an absolute entangled-state fidelity or a service guarantee.

  4. EPB Quantum facilities and availability ↗Organization-originated source · Publication date not stated

    The operator labels its quantum network available now and separately describes quantum computing facilities as coming in 2026; the two access claims must not be conflated.

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