# The Quantum Internet

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Category: Future
Slides: 32
Updated: 2026-05-17T20:51:49.317Z
Tags: future, quantum, internet

## Summary

A Network Built on the Laws of Quantum Physics Key sections include: The Quantum Internet; Why a Quantum Internet?; Quantum Mechanics Foundations; Entanglement: The Quantum Link; Quantum Key Distribution (QKD); The Distance Problem; Quantum Repeaters; Satellite Quantum Communication; Quantum Teleportation; Stages of Development.

## Slide Outline

1. The Quantum Internet
2. Why a Quantum Internet?
3. Quantum Mechanics Foundations
4. Entanglement: The Quantum Link
5. Quantum Key Distribution (QKD)
6. The Distance Problem
7. Quantum Repeaters
8. Satellite Quantum Communication
9. Quantum Teleportation
10. Stages of Development
11. Hardware Platforms
12. The QuTech Milestone (2021)
13. Quantum Error Correction for Networks
14. Quantum Internet vs. Classical Internet
15. Application: Quantum Secure Communication
16. Application: Distributed Quantum Computing
17. Application: Quantum Sensing Networks
18. Post-Quantum Cryptography Context
19. Global Race: Major Programs
20. Network Architecture
21. Entanglement Routing
22. Quantum Memory Technology
23. Quantum Internet Protocols
24. Current Experimental Networks
25. Challenges: Engineering
26. Challenges: Theoretical
27. Industry Landscape
28. Timeline: When Will It Arrive?
29. Societal Implications
30. Open Questions
31. Key Researchers and Groups
32. A New Kind of Connection

## Slide Transcript

### Slide 1: The Quantum Internet

- A Network Built on the Laws of Quantum Physics
- The quantum internet will connect quantum processors through channels that exploit entanglement, superposition, and quantum teleportation. It promises unconditionally secure communication, distributed quantum computing, and entirely new applications impossible on classical networks.
- This is not an upgrade to the internet we know. It is something fundamentally different.

### Slide 2: Why a Quantum Internet?

- The classical internet transmits bits -- zeros and ones -- copied and amplified freely. The quantum internet transmits qubits -- quantum states that cannot be copied (no-cloning theorem) or observed without disturbance.
- Unconditional Security
- Quantum Key Distribution (QKD) provides encryption that is provably secure against any computational attack -- including future quantum computers that will break RSA and ECC.
- Distributed Quantum Computing
- Link quantum processors into a larger virtual machine. Solve problems no single quantum computer could tackle alone.
- Quantum Sensing Networks
- Entangled sensor arrays achieve measurement precision beyond classical limits -- enabling ultra-precise GPS, gravitational wave detection, and telescope networks.
- Blind Quantum Computing
- Delegate computations to remote quantum servers without revealing the input, algorithm, or output. Perfect computational privacy.

### Slide 3: Quantum Mechanics Foundations

- Understanding the quantum internet requires three key quantum phenomena:
- Superposition
- A qubit can exist in a combination of |0> and |1> simultaneously. Only upon measurement does it "collapse" to a definite state. This allows quantum systems to explore multiple possibilities at once.
- Entanglement
- Two particles can share a quantum state such that measuring one instantly determines the state of the other -- regardless of distance. Einstein called it "spooky action at a distance." It is the core resource of quantum networking.
- No-Cloning Theorem
- An unknown quantum state cannot be perfectly copied. This makes quantum communication inherently secure (eavesdropping disturbs the signal) but also means we cannot use classical amplifiers -- requiring entirely new network architecture.

### Slide 4: Entanglement: The Quantum Link

- Entanglement is the fundamental resource of quantum networking -- analogous to bandwidth in classical networks. Two entangled particles form a "link" regardless of physical separation.
- How It Works
- When two particles are entangled, their quantum states are correlated. Measuring particle A's spin as "up" instantly means particle B's spin is "down" -- even light-years away. No information travels faster than light (you cannot control the measurement outcome), but the correlations enable protocols impossible classically.
- Creating Entanglement
- Photon pair sources (spontaneous parametric down-conversion, quantum dots). Entanglement swapping between particles that never directly interacted. Atomic ensembles and nitrogen-vacancy centers in diamond as quantum memories that store and release entangled states on demand.

### Slide 5: Quantum Key Distribution (QKD)

- The first "killer application" of quantum networking -- already commercially deployed. QKD generates shared secret keys whose security is guaranteed by physics, not computational assumptions.
- BB84 Protocol (1984)
- Charles Bennett and Gilles Brassard. Alice sends qubits in random bases. Bob measures in random bases. They compare bases publicly, keep matching results as the key. Any eavesdropper (Eve) disturbs the qubits, detectable through increased error rates.
- E91 Protocol (1991)
- Artur Ekert. Uses entangled pairs. Security guaranteed by Bell inequality violations -- if an eavesdropper is present, correlations weaken measurably. Information-theoretic security from fundamental physics.
- Current Deployments
- China's 2,000 km Beijing-Shanghai QKD backbone (2017). Commercial QKD systems from ID Quantique, Toshiba, QuantumCTek. European EuroQCI initiative. UK Quantum Network. All fiber-based with satellite links for long-distance.

### Slide 6: The Distance Problem

- Quantum signals cannot be amplified like classical signals. Photons in fiber optic cables are absorbed -- losing about 0.2 dB/km. After ~100 km, the signal is too weak for reliable communication.
- "You cannot copy a quantum state, so you cannot build a classical repeater. The quantum internet needs an entirely new way to extend range."-- Stephanie Wehner, QuTech
- Solutions: Quantum repeaters (entanglement swapping + quantum memory), satellite links (less loss through vacuum/atmosphere), and error correction codes that protect fragile quantum states.

### Slide 7: Quantum Repeaters

- The critical technology for a scalable quantum internet. Quantum repeaters extend entanglement across arbitrary distances without amplification.
- Alice ---[entangle]--- Repeater Node ---[entangle]--- Bob
- | |
- [quantum memory] [entanglement swap] [quantum memory]
- | |
- Result: Alice and Bob share entanglement (never directly connected)
- Entanglement swapping: Two separate entangled pairs are connected by performing a joint measurement (Bell state measurement) at the intermediate node, creating entanglement between the endpoints.
- Quantum memory: Stores quantum states until both halves of the swap are ready. Current best: atomic ensembles, rare-earth ion crystals, nitrogen-vacancy centers. Coherence times improving from milliseconds to minutes.

### Slide 8: Satellite Quantum Communication

- Space-based links bypass fiber losses. Photons travel through vacuum with negligible absorption -- only atmospheric turbulence at endpoints causes loss.
- 2017China's Micius satellite demonstrates QKD between ground stations 1,200 km apart. First space-to-ground entanglement distribution.
- 2018Micius enables intercontinental video call (Beijing-Vienna) secured by satellite QKD.
- 2020Micius extends entanglement distribution to 1,120 km. Demonstrates entanglement-based QKD over satellite link.
- 2023+European Space Agency SAGA mission, Canadian QEYSSat, UK ROKS -- multiple nations pursuing quantum satellite capabilities. Constellation architectures proposed for global coverage.

### Slide 9: Quantum Teleportation

- Not science fiction teleportation of matter -- but the transfer of a quantum state from one location to another using entanglement and classical communication.
- The Protocol
- 1. Alice and Bob share an entangled pair.
- 2. Alice performs a joint measurement on her qubit-to-send and her half of the entangled pair.
- 3. Alice sends the measurement result (2 classical bits) to Bob.
- 4. Bob applies a correction operation to his particle.
- 5. Bob's particle now has the original quantum state -- without it ever physically traveling.
- Key Properties
- The original state is destroyed (no-cloning respected). Classical communication is required (no faster-than-light signaling). Fidelity depends on entanglement quality. This is the fundamental mechanism for quantum state transfer across the network.
- Record distance: 1,400 km via Micius satellite (2017). Record fidelity: >99% in lab settings.

### Slide 10: Stages of Development

- Stephanie Wehner, David Elkouss, and Ronald Hanson proposed a quantum internet "stack" with six development stages:
- Stage 1: Trusted Node
- QKD with trusted intermediate nodes. Already deployed (Beijing-Shanghai). Security assumes nodes are trustworthy -- not fully quantum-secure.
- Stage 2: Prepare and Measure
- End-to-end QKD without trusted nodes. One party prepares quantum states, the other measures. Position verification, basic randomness expansion.
- Stage 3: Entanglement Distribution
- Network can distribute entangled pairs between any two nodes. Enables device-independent QKD and quantum money.
- Stage 4: Quantum Memory
- Nodes can store quantum states. Enables entanglement swapping, quantum repeater chains, and extended network reach.
- Stage 5: Few-Qubit Fault Tolerant
- Nodes perform error correction. Enables blind quantum computing, leader election, and distributed quantum algorithms.
- Stage 6: Full Quantum Computer
- All nodes are universal quantum computers. Enables any distributed quantum protocol -- the complete quantum internet.

### Slide 11: Hardware Platforms

- Multiple physical systems compete to become the quantum internet's "transistor" -- the basic hardware element.
- Trapped Ions
- Individual atoms held in electromagnetic traps. Long coherence times (minutes). High-fidelity gates. Networked via photonic interconnects. IonQ, Quantinuum pursuing network-ready systems.
- Nitrogen-Vacancy (NV) Centers
- Defects in diamond crystal. Operate at room temperature. Good photon interface. QuTech demonstrated first multi-node quantum network (3 nodes, Delft, 2021).
- Photonic Systems
- Qubits encoded in photon properties (polarization, time-bin). Natural for communication but hard to store. Integrated photonic chips enable compact transmitters/receivers.
- Neutral Atoms
- Arrays of atoms held by optical tweezers. Scalable to hundreds of qubits. Can emit photons for networking. Emerging platform with rapid progress.

### Slide 12: The QuTech Milestone (2021)

- Researchers at QuTech (Delft, Netherlands) demonstrated the first multi-node quantum network -- three nodes named Alice, Bob, and Charlie, connected by entanglement.
- Achievement
- Entanglement distributed between non-adjacent nodes via entanglement swapping at the middle node. Quantum teleportation of a qubit state from Charlie to Alice via Bob. First demonstration of a genuine quantum network (not just point-to-point link).
- Technology
- Nitrogen-vacancy centers in diamond as quantum nodes. Photonic channels for entanglement distribution. Real-time classical communication for protocol coordination. Quantum memory for synchronization.
- Significance
- Proof of concept that quantum repeater architecture works. Showed that multi-hop entanglement is practically achievable. A fundamental step from "quantum link" to "quantum network."

### Slide 13: Quantum Error Correction for Networks

- Quantum states are fragile -- decoherence degrades them rapidly. Error correction is essential for reliable quantum networking.
- The Challenge
- Classical error correction copies bits to detect errors. Quantum mechanics forbids copying (no-cloning). Measurement disturbs states. So quantum error correction encodes one logical qubit across multiple physical qubits using entanglement -- detecting and correcting errors without revealing the encoded information.
- Network-Specific Codes
- Quantum error-correcting codes protect qubits during transmission and storage. Entanglement distillation extracts high-quality entanglement from multiple noisy copies. Quantum repeater codes (like the all-photonic repeater) aim to eliminate the need for quantum memory through one-way error correction.

### Slide 14: Quantum Internet vs. Classical Internet

- A comparison of architectures and capabilities
- Information Unit
- Classical: Bit (0 or 1)
- Quantum: Qubit (superposition of |0> and |1>)
- Copying
- Classical: Freely copied and amplified
- Quantum: Cannot be copied (no-cloning)
- Amplification
- Classical: Signal repeaters every few km
- Quantum: Quantum repeaters (entanglement swapping + memory)
- Security Basis
- Classical: Computational hardness (can be broken with enough computing power)
- Quantum: Laws of physics (unconditional, information-theoretic)
- Relationship
- The quantum internet does NOT replace the classical internet. It runs alongside it -- using classical channels for coordination and quantum channels for tasks requiring quantum properties.

### Slide 15: Application: Quantum Secure Communication

- Beyond QKD, the quantum internet enables communication security protocols fundamentally impossible with classical technology.
- Device-Independent QKD
- Security does not depend on trusting your hardware. Even if devices are manufactured by an adversary, Bell inequality violations guarantee key security. Requires Stage 3+ quantum network.
- Quantum Secret Sharing
- Split a secret among N parties such that only K or more together can reconstruct it. Uses multipartite entanglement. No individual party learns anything.
- Position-Based Cryptography
- Verify a party's physical location using quantum no-cloning. Cannot be spoofed by distant adversaries (within certain assumptions). Applications in military and banking.
- Quantum Digital Signatures
- Quantum analogue of classical digital signatures with information-theoretic security against forgery.

### Slide 16: Application: Distributed Quantum Computing

- No single quantum computer will be large enough for all problems. The quantum internet enables distributed quantum computation -- linking processors into a collective quantum supercomputer.
- Architecture
- Multiple quantum processors connected by entanglement channels. Distributed quantum gates performed via quantum teleportation. Each node contributes qubits to a joint computation. The logical computer spans physical locations.
- Applications
- Quantum cloud computing: Access remote quantum computers from anywhere.
- Modular quantum computers: Scale beyond single-chip limits by connecting modules.
- Blind quantum computing: Compute on a remote server without revealing your data or algorithm -- perfect privacy for sensitive computations.

### Slide 17: Application: Quantum Sensing Networks

- Entangled sensor arrays surpass classical measurement limits -- enabling precision instruments for science and navigation.
- Clock Synchronization
- Entanglement-enhanced clock networks achieve synchronization beyond classical limits. Applications in GPS (centimeter precision), financial trading, and fundamental physics experiments.
- Gravitational Wave Detection
- Distributed quantum sensors could form a global gravitational wave observatory with sensitivity beyond LIGO. Entanglement reduces quantum noise at the measurement limit.
- Quantum Telescope
- Entangled photon receivers at separate locations simulate a single telescope with baseline equal to their separation -- achieving resolution impossible with individual instruments.
- Magnetic Field Mapping
- Networks of quantum magnetometers (NV centers, SQUIDs) for geological survey, medical imaging (brain activity), and submarine detection.

### Slide 18: Post-Quantum Cryptography Context

- The quantum internet exists in a landscape where quantum computers threaten current encryption -- and two responses are racing:
- Post-Quantum Cryptography (PQC)
- Classical algorithms resistant to quantum attack (lattice-based, code-based, hash-based). NIST standardized algorithms in 2024 (ML-KEM, ML-DSA, SLH-DSA). Software-only -- no new hardware needed. Being deployed now.
- Limitation: security is computational (assumed hard, not proven). Future algorithms might break them.
- Quantum Key Distribution (QKD)
- Security from physics laws -- unconditional. Requires quantum hardware and infrastructure. Currently limited in distance and key rate.
- Limitation: expensive, requires dedicated fiber/satellite. Vulnerable to implementation attacks (side channels).
- The likely future: both together -- PQC for broad deployment, QKD for highest-security applications.

### Slide 19: Global Race: Major Programs

- China
- World leader in quantum communication infrastructure. 2,000 km fiber QKD backbone. Micius satellite. Plans for quantum satellite constellation. Massive government investment through USTC (Hefei).
- European Union
- EuroQCI: pan-European quantum communication infrastructure connecting all 27 member states. Quantum Internet Alliance (QuTech-led). EAGLE-1 satellite mission. 1 billion EUR+ investment.
- United States
- DOE blueprint for quantum internet (2020). National Quantum Initiative. Chicago-area quantum network testbed (Argonne-Fermilab). Multiple university-led efforts.
- Other
- UK: Quantum Network (UKQN). Japan: NICT quantum network testbed. South Korea: quantum cryptography satellites planned. India, Australia, Singapore: active programs.

### Slide 20: Network Architecture

- The quantum internet will not be a single technology but a layered architecture -- much like the classical internet's OSI model.
- Physical Layer
- Photon sources, detectors, fibers, quantum memories, satellites. Hardware that generates, transmits, and stores quantum states.
- Link Layer
- Entanglement generation between adjacent nodes. Protocols for heralded entanglement, distillation, and error management at the link level.
- Network Layer
- Routing entanglement across multiple hops. Entanglement swapping schedules. Path selection in heterogeneous networks (some links satellite, some fiber).
- Application Layer
- QKD, blind computation, sensing protocols. Interfaces that quantum application developers use without needing to manage lower-layer complexity.

### Slide 21: Entanglement Routing

- Classical internet routing sends packets along paths. The quantum internet must route entanglement -- which requires fundamentally different algorithms.
- Challenges
- Entanglement decays over time (decoherence). Failed entanglement attempts waste resources. Multi-path routing can create conflicts at intermediate nodes. Demand is concurrent -- multiple users compete for limited entanglement.
- Approaches
- Path-based: Reserve a route, generate entanglement hop-by-hop, swap to create end-to-end link.
- Graph state routing: Pre-distribute entanglement in graph states, then route by local measurements -- more flexible but resource-intensive.
- Opportunistic: Generate entanglement on available links, store in memories, swap when paths connect. Better for noisy, unreliable links.

### Slide 22: Quantum Memory Technology

- Quantum memories are the RAM of the quantum internet -- storing quantum states until they are needed for swapping, processing, or retrieval.
- Requirements
- Long coherence time (state preservation). High efficiency (photon in = photon out). On-demand read/write. Compatibility with telecom-wavelength photons. Multimode capacity (store multiple qubits).
- Atomic Ensembles
- Clouds of rubidium or cesium atoms. Collective enhancement gives good efficiency. Millisecond storage. Used in early quantum repeater demos.
- Rare-Earth Ion Crystals
- Europium, praseodymium ions in crystals. Record coherence: 6 hours (Eu:YSO). Multiplexing possible. Promising for deployed quantum repeaters.
- NV Centers in Diamond
- Room-temperature operation. Seconds-long coherence at cryogenic temps. Good photon interface. Used in QuTech network demos.

### Slide 23: Quantum Internet Protocols

- Beyond QKD, researchers are developing a rich protocol stack for the quantum internet.
- Quantum Anonymous Transmission
- Send a message without anyone (including the network) knowing who sent it. Uses multipartite entanglement among all nodes.
- Quantum Voting
- Secure electronic voting where individual votes remain private, the tally is correct, and fraud is detectable -- with information-theoretic guarantees.
- Quantum Money
- Unforgeable currency tokens based on quantum no-cloning. A bank can verify authenticity but counterfeit is physically impossible.
- Quantum Leader Election
- Distributed protocol to fairly select a leader among N parties without trusted coordinator. Uses quantum coin-flipping.

### Slide 24: Current Experimental Networks

- 2004DARPA Quantum Network (BBN, Harvard, Boston U) -- first QKD network with trusted nodes. Operated continuously in Cambridge, MA.
- 2010Tokyo QKD Network -- 6 nodes, multiple QKD protocols demonstrated. Japanese-European collaboration.
- 2017China's Beijing-Shanghai backbone -- 2,000 km, 32 trusted nodes. World's longest QKD link.
- 2021QuTech 3-node quantum network (Delft) -- first entanglement-based multi-node network. Quantum teleportation between non-adjacent nodes.
- 2023Chicago Quantum Exchange connects Argonne, Fermilab, and Northwestern via 200 km fiber. Entanglement distribution over metropolitan distances.
- 2024-25Multiple cities building metropolitan quantum networks: Boston, Bristol, Paris, Vienna, Singapore. Industry players (Toshiba, AWS, PsiQuantum) entering.

### Slide 25: Challenges: Engineering

- Turning laboratory demonstrations into deployed infrastructure requires solving formidable engineering problems.
- Loss and Noise
- Fiber loss limits range. Detector dark counts introduce errors. Quantum memories have limited efficiency and coherence. Every component must improve by orders of magnitude.
- Rate
- Current entanglement distribution rates are kilohertz (thousands per second). Useful networks need megahertz to gigahertz rates. Multiplexing, faster sources, and better detectors needed.
- Scalability
- Demonstrated with 3 nodes. Scaling to thousands requires manufacturing, standardization, and network management automation that does not yet exist.
- Integration with Classical
- Quantum signals must coexist with classical traffic in the same fiber (wavelength-division multiplexing). Classical photon noise can overwhelm quantum signals.

### Slide 26: Challenges: Theoretical

- Open theoretical questions that must be resolved for a fully functional quantum internet.
- Network Capacity
- What is the maximum rate of entanglement distribution for a given network topology? Quantum capacity of channels and networks is not fully characterized.
- Multipartite Protocols
- Most protocols are bipartite (two-party). Extending to many-party scenarios (conference key agreement, distributed sensing) requires understanding multipartite entanglement distribution -- much harder.
- Fault Tolerance
- What are the minimum resource requirements for fault-tolerant quantum networking? How much redundancy is needed to guarantee reliable service?
- Verification
- How do you verify that a quantum network is actually quantum -- and not being simulated classically? Self-testing protocols are needed.

### Slide 27: Industry Landscape

- QKD Hardware
- ID Quantique (Geneva), Toshiba Quantum Technology (Cambridge), QuantumCTek (China), SK Telecom (Korea). Commercial systems deploying now for government and financial clients.
- Quantum Networking
- Aliro Quantum (network OS), Qunnect (room-temperature quantum memory), SpeQtral (satellite entanglement), Nu Quantum (photon sources/detectors).
- Infrastructure
- BT, Deutsche Telekom, Telefonica, Verizon -- telecom giants participating in quantum network testbeds. Future quantum repeaters could be co-located with classical network infrastructure.
- Cloud Quantum
- IBM, Google, Amazon (Braket), Microsoft (Azure Quantum) -- all exploring quantum networking to connect their quantum data centers. First application: linking quantum processors for distributed computing.

### Slide 28: Timeline: When Will It Arrive?

- The quantum internet will not appear overnight. Deployment will be gradual, application-driven, and geographically uneven.
- Now - 2027Metropolitan QKD networks. Point-to-point entanglement links. Satellite QKD services. Stage 1-2 networks for government/finance.
- 2027 - 2032First quantum repeater deployments. Multi-city entanglement distribution. Early Stage 3 networks. Quantum cloud computing access expands.
- 2032 - 2040National-scale quantum networks. Satellite constellations for global reach. Stage 4-5 capabilities. Quantum sensing networks operational.
- 2040+Global quantum internet (Stage 6). Interconnected quantum computers. Full protocol suite available to users worldwide.
- These timelines are speculative -- breakthroughs (or delays) in quantum memory and error correction could shift dates significantly.

### Slide 29: Societal Implications

- A fully realized quantum internet would reshape security, privacy, science, and power structures.
- End of Code-Breaking?
- If quantum-secure communication becomes universal, signals intelligence (SIGINT) as practiced by NSA, GCHQ, and others becomes obsolete for quantum-encrypted traffic. Geopolitical power shifts.
- Scientific Collaboration
- Distributed quantum computers could tackle drug discovery, materials science, and climate modeling at scales impossible for any single nation's quantum processor.
- Digital Divide
- Will quantum internet access be equitable? Or will it create a new divide between quantum-secure nations/corporations and those relying on breakable classical crypto?
- Verification and Trust
- Quantum protocols enable new forms of trust: proven randomness, verified computation, unforgeable identity. Could reduce the need for centralized trust authorities.

### Slide 30: Open Questions

- Fundamental questions that researchers are working to answer:
- Can We Build Room-Temperature Quantum Repeaters?
- Current memories require cryogenic cooling. Room-temperature operation would dramatically reduce cost and complexity. NV centers and warm atomic vapors are candidates.
- What Is the Killer App?
- Beyond QKD, which application will drive mass adoption and justify infrastructure investment? Distributed quantum computing? Sensing? Something not yet imagined?
- How Do We Standardize?
- Interoperability requires standards. IETF and ETSI have quantum networking working groups, but standardization lags behind development. Who sets the protocols?
- Can Biology Help?
- Photosynthesis may use quantum coherence. Could biological systems inspire quantum network design? An open and fascinating question.

### Slide 31: Key Researchers and Groups

- Stephanie Wehner
- QuTech, Delft. Proposed the quantum internet development stages. Leading the Quantum Internet Alliance. Network architecture pioneer.
- Jian-Wei Pan
- USTC, China. Led Micius satellite experiments. Pioneered long-distance quantum communication and entanglement distribution records.
- Ronald Hanson
- QuTech, Delft. Led the 3-node quantum network demonstration. NV center quantum networking expert.
- Mikhail Lukin
- Harvard. Quantum memory research, quantum repeater protocols, and metropolitan quantum network demonstrations.
- Artur Ekert
- Oxford/NUS Singapore. Invented entanglement-based QKD (E91). Foundational contributions to quantum cryptography.

### Slide 32: A New Kind of Connection

- The quantum internet represents something unprecedented: a network whose security is guaranteed by the fundamental structure of reality, not by mathematical puzzles. A network where information behaves in ways our classical intuitions cannot fully grasp.
- "The quantum internet will be the first technology that directly harnesses quantum entanglement -- the universe's most intimate form of correlation -- for human communication."
- We are building infrastructure for a world where physics itself becomes the trusted third party. The challenges are immense -- but the laws of quantum mechanics are on our side. What we build with them will define the information age's next chapter.


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