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Quantum computation through entangling single photons in multipath interferometers

Howell1, Yeazell

  • 1Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.

Physical Review Letters
|September 16, 2000
PubMed
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This study introduces a hybrid quantum computing approach using entangled photons with multiple degrees of freedom. This method overcomes limitations in scale for quantum simulations and demonstrates key quantum computing operations.

Area of Science:

  • Quantum Information Science
  • Quantum Computing
  • Quantum Optics

Background:

  • Single-photon interferometry has been utilized for quantum computation simulations.
  • Current limitations include scalability issues due to physical size constraints with increasing numbers of bits.

Purpose of the Study:

  • To propose a novel hybrid approach for quantum computation using entangled photons.
  • To overcome the scalability limitations of traditional single-photon interferometry.

Main Methods:

  • Employing n photons, each with L degrees of freedom, to create L(n) basis states.
  • Utilizing quantum nondemolition measurement for photon entanglement.
  • Integrating entanglement into interferometric setups.

Related Experiment Videos

Main Results:

  • Demonstration of a controlled-NOT (CNOT) gate.
  • Implementation of a Grover's search circuit.
  • Creation of L(n) basis states using entangled photons.

Conclusions:

  • The proposed hybrid method enhances scalability for quantum simulations.
  • Entanglement is successfully integrated into interferometry for quantum computing.
  • The approach is applicable to studying high-dimensional nonlocal correlations.