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Related Concept Videos

Standing Waves in a Cavity01:28

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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Cavity State Manipulation Using Photon-Number Selective Phase Gates.

Reinier W Heeres1, Brian Vlastakis1, Eric Holland1

  • 1Departments of Physics and Applied Physics, Yale University, New Haven, Connecticut 06520, USA.

Physical Review Letters
|October 10, 2015
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Summary
This summary is machine-generated.

We developed a selective number-dependent arbitrary phase (snap) gate for controlling quantum information stored in cavity resonators. This new gate enables high-fidelity creation of quantum states and scalable logical operations for quantum computing.

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Area of Science:

  • Quantum Information Science
  • Quantum Computing
  • Cavity Quantum Electrodynamics

Background:

  • Cavity resonators offer large Hilbert spaces and high coherence for encoding quantum bits.
  • Performing quantum gates on encoded information requires complex nonlinear operations on multiple oscillator levels.

Purpose of the Study:

  • To introduce a novel quantum gate for precise control of oscillator-encoded qubits.
  • To demonstrate a scalable method for manipulating quantum information in cavity resonators.

Main Methods:

  • Introduction of the selective number-dependent arbitrary phase (snap) gate.
  • Utilizing an off-resonantly coupled qubit to impart distinct phases to Fock-state components.
  • Combining the snap gate with oscillator displacements for quantum state preparation.

Main Results:

  • The snap gate enables precise control over quantum phases, correcting for Kerr effect-induced phase evolution.
  • High-fidelity creation of a one-photon Fock state was achieved by combining snap gates and displacements.
  • Demonstrated that snap gates and displacements allow for arbitrary unitary operations.

Conclusions:

  • The snap gate provides a powerful tool for manipulating oscillator-encoded qubits.
  • This approach offers a scalable route for performing logical operations in quantum computing architectures.
  • Enables advanced control over quantum phases and state preparation in cavity-based quantum systems.