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PreprintCC BY 4.0arXiv

Dynamical qubit cooling via quasi-particle transport

  • Kyle Monkman
  • Jasmin Bedow
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Abstract

Cooling a quantum state presents a challenge as the external control in active protocols can induce detrimental heating in the system. Passive cooling processes offer a valuable alternative: Here, we present a simple quench protocol to cool a set of qubits with access to an ancillary spin chain. We show that excitations can be transported out of the qubits as quasi-particles, taking the form of magnons in a ferromagnetic ancilla and triplons in a dimerized antiferromagnetic ancilla. This quasi-particle transport mechanism enables cooling towards both individual and highly entangled two-qubit target states. We demonstrate that this cooling mechanism remains robust starting from thermal states and with finite quench ramp times.

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Cite

BibTeXRIS
BibTeX
@misc{monkman2026dynamical,
  title = {{Dynamical qubit cooling via quasi-particle transport}},
  author = {Kyle Monkman and Jasmin Bedow},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.12289},
  eprint = {2609.12289},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.12289},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Dynamical qubit cooling via quasi-particle transport
AU  - Kyle Monkman
AU  - Jasmin Bedow
PY  - 2026
DA  - 2026/09/10
PB  - arXiv
DO  - 10.48550/arxiv.2609.12289
UR  - https://arxiv.org/abs/2609.12289
AB  - Cooling a quantum state presents a challenge as the external control in active protocols can induce detrimental heating in the system. Passive cooling processes offer a valuable alternative: Here, we present a simple quench protocol to cool a set of qubits with access to an ancillary spin chain. We show that excitations can be transported out of the qubits as quasi-particles, taking the form of magnons in a ferromagnetic ancilla and triplons in a dimerized antiferromagnetic ancilla. This quasi-particle transport mechanism enables cooling towards both individual and highly entangled two-qubit target states. We demonstrate that this cooling mechanism remains robust starting from thermal states and with finite quench ramp times.
ER  -