Entanglemons: Cross-platform protected qubits from entanglement
Nilotpal Chakraborty, Roderich Moessner, Benoit Doucot

TL;DR
The paper introduces entanglemons, a novel cross-platform approach to constructing logical qubits with intrinsic noise protection using entanglement and complex geometric spaces, advancing scalable fault-tolerant quantum computing.
Contribution
It proposes a new entanglement-based qubit construction leveraging complex projective space geometry for noise resilience, applicable across multiple quantum hardware platforms.
Findings
Models demonstrate platform-agnostic noise protection
Qubit basis states are the lowest energy states with energy gaps
Potential realization in superconducting, ion traps, and quantum dots
Abstract
A crucial ingredient for scalable fault-tolerant quantum computing is the construction of logical qubits with low error rates and intrinsic noise protection. We propose a cross-platform construction for such hardware-level noise-protection in which the qubits are protected from depolarizing (relaxation) and dephasing errors induced by local noise. These logical qubits arise from the entanglement between two internal degrees of freedom, hence - entanglemons. Our construction is based on the emergence of collective degrees of freedom from a generalized coherent state construction, similar in spirit to spin coherent states, of a set of such internally entangled units. These degrees of freedom, for a finite number of units, parametrize the quantized version of complex projective space P(3). The noise protection of the entanglemon qubit is then a consequence of a weakly coupled…
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Taxonomy
TopicsQuantum Computing Algorithms and Architecture
