Pseudospin Quantum Computation in Semiconductor Nanostructures

Abstract

We theoretically show that spontaneously interlayer-coherent bilayer quantum Hall droplets should allow robust and fault-tolerant pseudospin quantum computation in semiconductor nanostructures with voltage-tuned external gates providing qubit control and a quantum Ising Hamiltonian providing qubit entanglement. Using a spin-boson model we estimate decoherence to be small $(\sim 10^{-5})$.

5 pages, 3 figures New version to appear in PRL

References in corpus (10)

• Quantum Computation with Quantum Dots
• Elementary gates for quantum computation
• Quantum state engineering with Josephson-junction devices
• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• The Physical Implementation of Quantum Computation
• Evidence for a Goldstone Mode in a Double Layer Quantum Hall System
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• Quantum-Hall Quantum-Bits
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Cited by in corpus (7)

• Silicon quantum computation based on magnetic dipolar coupling
• Quantum Computation and Bell-state Measurement with Double-Dot Molecules
• Cavity-mediated coherent coupling between distant quantum dots
• Husimi function and phase-space analysis of bilayer quantum Hall systems at $\nu =2/\lambda$
• Interlayer coherence and entanglement in bilayer quantum Hall states at filling factor $\nu =2/\lambda$
• Pseudospin and Quantum Computation in Semiconductor Nanostructures
• Eliminating interactions between non-neighboring qubits in the preparation of cluster states in quantum molecules