Experimental demonstration of entanglement-enabled universal quantum cloning in a circuit
arXiv:1909.03170 · doi:10.1038/s41534-021-00375-5
Abstract
No-cloning theorem forbids perfect cloning of an unknown quantum state. A universal quantum cloning machine (UQCM), capable of producing two copies of any input qubit with the optimal fidelity, is of fundamental interest and has applications in quantum information processing. This is enabled by delicately tailored nonclassical correlations between the input qubit and the copying qubits, which distinguish the UQCM from a classical counterpart, but whose experimental demonstrations are still lacking. We here implement the UQCM in a superconducting circuit, and investigate these correlations. The measured entanglements well agree with our theoretical prediction that they are independent of the input state and thus constitute a universal quantum behavior of the UQCM that was not previously revealed. Another feature of our experiment is the realization of deterministic and individual cloning, in contrast to previously demonstrated UQCMs, which either were probabilistic or did not constitute true cloning of individual qubits.
arXiv comment11 pages, 7 figures, 1 table
References in corpus (28)
- Quantum Cryptography
- Entanglement of Formation of an Arbitrary State of Two Qubits
- Quantum Copying: Beyond the No-Cloning Theorem
- Optimal Quantum Cloning Machines
- Quantum cloning
- Coherent control of an atomic collision in a cavity
- Realization of Three-Qubit Quantum Error Correction with Superconducting Circuits
- Optimal Universal and State-Dependent Quantum Cloning
- 10-qubit entanglement and parallel logic operations with a superconducting circuit
- Implementation of a Toffoli Gate with Superconducting Circuits
- Observation of multi-component atomic Schrödinger cat states of up to 20 qubits
- Experimental Quantum Cloning of Single Photons
- Emulating many-body localization with a superconducting quantum processor
- Optimal quantum cloning of orbital angular momentum photon qubits via Hong-Ou-Mandel coalescence
- Quantum copying: A network
- Quantum Cloning Machines and the Applications
- Approximate Quantum Cloning with Nuclear Magnetic Resonance
- Experimental Quantum Cloning with Prior Partial Information
- Quantum cloning with an optical fiber amplifier
- Teleportation scheme implementing contextually the Universal Optimal Quantum Cloning Machine and the Universal Not Gate. Complete experimental realization
- Continuous-variable geometric phase and its manipulation for quantum computation in a superconducting circuit
- Emulating anyonic fractional statistical behavior in a superconducting quantum circuit
- Cloning and quantum computation
- Scheme for the implementation of a universal quantum cloning machine via cavity-assisted atomic collisions in cavity QED
- Deterministic entanglement swapping in a superconducting circuit
- Arbitrary control of coherent dynamics for distant qubits in a quantum network
- Optical realization of universal quantum cloning
- Separating the classical and quantum information via quantum cloning
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- Probing Quantum Telecloning on Superconducting Quantum Processors
- Scheme for measuring topological transitions in a continuous variable system
- Quantum Telecloning on NISQ Computers
- One-step implementation of nonadiabatic geometric fSim gate in superconducting circuits
- An exceptional surface and its topology