Pith Number

pith:WQT6MLW4

pith:2026:WQT6MLW4RCIOZPOKTIMXX5B4RL

not attested not anchored not stored refs pending

Tailoring Germanium Heterostructures for Quantum Devices with Machine Learning

Giordano Scappucci, Kevin Rossi, Patrick Del Vecchio, Stefano Bosco

Localized strained silicon spikes in unstrained germanium channels can increase spin-orbit interaction by up to three orders of magnitude.

arxiv:2604.21732 v2 · 2026-04-23 · cond-mat.mes-hall

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\usepackage{pith}
\pithnumber{WQT6MLW4RCIOZPOKTIMXX5B4RL}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

we demonstrate that concrete heterostructure modifications can overcome these limitations, enhancing SOI by up to three orders of magnitude... Our heterostructure substantially enhances device performance, yielding up to two orders of magnitude higher quantum-dot spin qubit quality factors than state-of-the-art materials. We also predict GHz-scale spin splittings for hybrid superconducting Andreev spin qubits.

C2weakest assumption

The multi-objective Bayesian optimization accurately models real epitaxial growth constraints and that the computed SOI enhancements and quality factor improvements will translate to fabricated devices without defects or unmodeled scattering effects.

C3one line summary

Localized strained silicon spikes in unstrained Ge channels, optimized via multi-objective Bayesian optimization, enhance spin-orbit interaction by up to three orders of magnitude and improve quantum-dot spin qubit quality factors by up to two orders.

Cited by

3 papers in Pith

Strain engineering of Andreev spin qubits in Germanium

g-tensor Optimization in Ge/SiGe Quantum Dots

Strain engineering of Andreev spin qubits in Germanium

Receipt and verification

First computed	2026-06-02T02:04:53.395606Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b427e62edc8890ecbdca9a197bf43c8af1d7d2856d82b39ff40b7d50795ac688

Aliases

arxiv: 2604.21732 · arxiv_version: 2604.21732v2 · doi: 10.48550/arxiv.2604.21732 · pith_short_12: WQT6MLW4RCIO · pith_short_16: WQT6MLW4RCIOZPOK · pith_short_8: WQT6MLW4

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/WQT6MLW4RCIOZPOKTIMXX5B4RL \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: b427e62edc8890ecbdca9a197bf43c8af1d7d2856d82b39ff40b7d50795ac688

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b79342e2538fbadd900246983ec740b5a5b0435cb3f4d5de85e4e2de4728d190",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.mes-hall",
    "submitted_at": "2026-04-23T14:37:22Z",
    "title_canon_sha256": "159eef8d42cc2888bb6af1f4aa1773176536b254c5076f3f23258798920a137d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.21732",
    "kind": "arxiv",
    "version": 2
  }
}