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Quantum phase control of entanglement.

Vladimir S Malinovsky1, Ignacio R Sola

  • 1Michigan Center for Theoretical Physics & FOCUS Center, Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA. vsmalinovsky@magiqtech.com

Physical Review Letters
|December 17, 2004
PubMed
Summary

Researchers propose a new method for controlling quantum entanglement in two-qubit systems. By adjusting pulse phases, they can precisely manage entanglement, offering new possibilities for quantum technologies.

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Area of Science:

  • Quantum Information Science
  • Atomic, Molecular, and Optical Physics

Background:

  • Quantum entanglement is a key resource for quantum computation and communication.
  • Controlling entanglement is crucial for developing robust quantum technologies.

Purpose of the Study:

  • To propose a novel method for the phase control of entanglement in two-qubit systems.
  • To demonstrate the ability to control entanglement at will using phase manipulation.

Main Methods:

  • Utilizing closed-loop couplings in a two-qubit system.
  • Employing adiabatic dynamics through time-delayed pulse sequences.
  • Investigating both resonant and nonresonant transitions.

Main Results:

  • Demonstrated precise control over quantum entanglement by adjusting the relative phase of driving pulses.
  • Showcased the effectiveness of the proposed method for entanglement manipulation.

Conclusions:

  • The proposed phase control method offers a versatile tool for managing entanglement in two-qubit systems.
  • This technique is implementable with various transition types, enhancing its practical applicability.

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