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Quantum spin transistor with a Heisenberg spin chain
O V Marchukov1,2, A G Volosniev1,3, M Valiente4
1Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark.
Nature Communications
|October 11, 2016
Summary
We propose a quantum spin transistor using a Heisenberg XXZ spin chain for controlled quantum state transfer. This system enables perfect state transfer or complete blockade, paving the way for quantum logic elements.
Area of Science:
- Quantum physics
- Quantum information science
- Condensed matter physics
Background:
- Spin chains are crucial for studying quantum phases and transitions.
- They are vital for quantum information applications like quantum computation and communication.
Purpose of the Study:
- To propose and analyze a scheme for conditional state transfer in a Heisenberg XXZ spin chain.
- To realize a functional quantum spin transistor.
Main Methods:
- Utilizing a Heisenberg XXZ spin chain architecture.
- Implementing a control spin excitation in the central gate region.
- Analyzing the conditional transfer and blockade of target spin states.
Main Results:
- Demonstrated a quantum spin transistor functionality.
- Achieved perfect state transfer or complete blockade based on control spin presence.
- Proposed a proof-of-concept realization using cold atoms.
Conclusions:
- The proposed scheme enables tunable, conditional quantum state transfer.
- It offers a pathway towards integrated quantum logic elements.
- Applicable to various tunable spin chain implementations.
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