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Experimental teleportation of a quantum controlled-NOT gate
Yun-Feng Huang1, Xi-Feng Ren, Yong-Sheng Zhang
1Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, Peoples Republic of China.
Physical Review Letters
|February 9, 2005
Summary
We experimentally demonstrated the teleportation of a quantum controlled-NOT (CNOT) gate, a crucial step for quantum networking and computation. This breakthrough achieved an average fidelity of 0.84 for the remote quantum gate, advancing quantum information science.
Area of Science:
- Quantum Information Science
- Quantum Computing
- Quantum Networking
Background:
- Quantum gate teleportation is essential for building quantum networks and enabling teleportation-based quantum computation.
- Implementing remote quantum operations is a key challenge in quantum information science.
Purpose of the Study:
- To experimentally demonstrate the teleportation of a quantum controlled-NOT (CNOT) gate.
- To enable the operation of quantum gates on remote qubits.
Main Methods:
- Utilized linear optical manipulations and photon entanglement generated via parametric down-conversion.
- Employed postselection based on coincidence measurements to achieve gate teleportation.
- Characterized the teleported gate's quality using quantum process tomography.
Main Results:
- Successfully teleported a quantum controlled-NOT (CNOT) gate from local to remote qubits.
- Achieved an average fidelity of 0.84 for the teleported quantum gate.
- Demonstrated the feasibility of remote quantum gate operations.
Conclusions:
- The experimental demonstration confirms the viability of quantum gate teleportation.
- This work represents a significant advancement for quantum networking and distributed quantum computation.
- High-fidelity remote gate operations are achievable, paving the way for future quantum technologies.