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Updated: Jan 28, 2026

Standardized Modular Assembly of Polycistronic Operons with Modular Cloning (MoClo) using the In-Cloning toolkit
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Encrypted Qubits Can Be Cloned.

Koji Yamaguchi1,2, Achim Kempf1,3,4,5

  • 1University of Waterloo, Department of Applied Mathematics, Waterloo, Ontario N2L 3G1, Canada.

Physical Review Letters
|January 26, 2026
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Summary
This summary is machine-generated.

Researchers demonstrate encrypted quantum cloning, allowing secure duplication of unknown quantum states. This breakthrough enables applications like encrypted quantum cloud storage, overcoming limitations of the no-cloning theorem.

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Area of Science:

  • Quantum Information Science
  • Quantum Cryptography
  • Quantum Computing

Background:

  • The no-cloning theorem fundamentally prohibits perfect duplication of unknown quantum states.
  • Existing quantum communication protocols face limitations in redundancy and scalability due to the no-cloning theorem.

Purpose of the Study:

  • To introduce and demonstrate the feasibility of encrypted quantum cloning for unknown quantum states.
  • To explore a new paradigm for quantum information processing that circumvents direct duplication restrictions.

Main Methods:

  • Utilized unitary transformations to create encrypted clones of qubits.
  • Developed a decryption process involving a unitary transformation that consumes a decryption key.

Main Results:

  • Successfully demonstrated the creation of any number of encrypted clones of a qubit.
  • Confirmed that each encrypted clone can be decrypted via a unitary transformation.
  • Showcased that decryption is a one-time event, consuming the key and aligning with the no-cloning theorem.

Conclusions:

  • Encrypted cloning offers a novel approach to achieve redundancy, parallelism, and scalability in quantum systems.
  • This technique provides a secure method for quantum state duplication, enabling applications such as encrypted quantum multicloud storage.