Using hyperentanglement for advanced quantum communication

Graham, Trent Michael

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https://hdl.handle.net/2142/90539 Copy

Description

Title

Using hyperentanglement for advanced quantum communication

Author(s)

Graham, Trent Michael

Issue Date

2016-04-14

Director of Research (if dissertation) or Advisor (if thesis)

Kwiat, Paul G.

Doctoral Committee Chair(s)

Van Harlingen, Dale J.

Committee Member(s)

• Ceperley, David M.
• Peng, Jen-Chieh
• Hughes, Taylor L.

Department of Study

Physics

Discipline

Physics

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

Ph.D.

Degree Level

Dissertation

Keyword(s)

• Hyperentanglement
• Quantum Communication
• Quantum Optics

Abstract

"The field of quantum information science promises incredible enhancements in computing, metrology, simulation, and communication, but the challenge of creating, manipulating, and measuring the large quantum states has limited current implementations of such techniques. Such limitations affect photonic quantum information in particular, because photons lack the strong nonlinear interactions required for building up many-particle entangled states and performing multi-photon gates; nevertheless, because photons are currently the only ""flying qubit"", i.e., qubits that are mobile, they are a required resource for quantum communication protocols. One strategy to partially mitigate this limitation is to encode multiple entangled qubits on the different degrees of freedom of a single pair of photons. Such ""hyperentangled"" quantum states may be created with enough qubits to enable a whole new class of quantum information experiments. Furthermore, while nonlinear interactions are required to implement multi-qubit gates between qubits encoded on different particles, such gates can be implemented between qubits encoded on the same particle using only linear elements, enabling a much broader class of measurements. We use hyperentangled states to implement various quantum communication and quantum metrology protocols. Specifically, we demonstrate that hyperentangled photons can be used to increase the classical channel capacity of a quantum channel, transport quantum information between two remote parties efficiently and deterministically, and efficiently characterize quantum channels. We will discuss how to produce, manipulate, and measure hyperentangled states and discuss how entanglement in multiple degrees of freedom enables each technique. Finally, we discuss the limitations of each of these techniques and how they might be improved as technology advances."

Graduation Semester

2016-05

Type of Resource

text

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http://hdl.handle.net/2142/90539

Copyright and License Information

Copyright 2016 Trent Graham

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