Pith Number

pith:4FA7XG4N

pith:2026:4FA7XG4N3HW2TSFPXJ7GSFMJPS

not attested not anchored not stored refs resolved

New Source of Spin-hot spot in displaced silicon double quantum dots

Sanjay Prabhakar

Displaced silicon double quantum dots produce a new low-field spin-hot spot with spin relaxation rates four orders of magnitude lower than conventional high-field spots.

arxiv:2605.16947 v1 · 2026-05-16 · cond-mat.mes-hall

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Claims

C1strongest claim

When quantum dots are separated by about 60 nm, calculations predict oscillations in spin-hot spots as the in-plane magnetic field changes. These unusual spin-hot spot oscillations occur at low magnetic fields (<1T), resulting in spin-relaxation rates about four orders of magnitude lower than those of conventional high-field spin-hot spots (≈ 4.5T). The extremely low spin-relaxation rate at the spin-hot spot enables the preparation of qubit superposition states for quantum computing and information processing.

C2weakest assumption

The dominant spin-relaxation channel is the deformation-potential coupling to acoustic phonons and that the model of two displaced, magnetically confined dots accurately captures all relevant level crossings without additional relaxation mechanisms such as interface roughness or charge noise.

C3one line summary

Numerical modeling of phonon-induced spin relaxation in displaced silicon double quantum dots reveals a new low-field spin-hot spot with relaxation rates four orders of magnitude lower than standard high-field ones when dots are separated by ~60 nm.

References

53 extracted · 53 resolved · 0 Pith anchors

[1] N. Sobrino, D. Jacob, and S. Kurth, Fully analytical equation of motion approach for the double quantum dot in the coulomb blockade regime, Physical Review B110, 115121 (2024) 2024

[2] D. Khomitsky, M. Bastrakova, and D. Pashin, Spin-flip locking by tunneling and relaxation in a driven double quantum dot with spin-orbit coupling, Physical Review B111, 085427 (2025) 2025

[3] H. A. Bhat, F. A. Khanday, B. K. Kaushik, F. Bashir, and K. A. Shah, Quantum computing: fundamentals, im- plementations and applications, IEEE Open Journal of Nanotechnology3, 61 (2022) 2022

[4] D. Su´ arez-Forero, M. Jalali Mehrabad, C. Vega, A. Gonz´ alez-Tudela, and M. Hafezi, Chiral quantum op- tics: recent developments and future directions, PRX Quantum6, 020101 (2025) 2025

[5] N. Banerjee, C. Bell, C. Ciccarelli, T. Hesjedal, F. John- son, H. Kurebayashi, T. Moore, C. Moutafis, H. Stern, I. Vera-Marun,et al., Materials for quantum technolo- gies: A roadmap for spin and topo 2025

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Receipt and verification

First computed	2026-05-20T00:03:32.336881Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e141fb9b8dd9eda9c8afba7e6915897cb3bf28ebba6bafe42aabdcf6ff1a8dc5

Aliases

arxiv: 2605.16947 · arxiv_version: 2605.16947v1 · doi: 10.48550/arxiv.2605.16947 · pith_short_12: 4FA7XG4N3HW2 · pith_short_16: 4FA7XG4N3HW2TSFP · pith_short_8: 4FA7XG4N

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/4FA7XG4N3HW2TSFPXJ7GSFMJPS \
  | 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: e141fb9b8dd9eda9c8afba7e6915897cb3bf28ebba6bafe42aabdcf6ff1a8dc5

Canonical record JSON

{
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    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "cond-mat.mes-hall",
    "submitted_at": "2026-05-16T11:57:51Z",
    "title_canon_sha256": "b2b569686ca34d6e778698083933ed6eb1ca965f391a12a87671cc09d407794c"
  },
  "schema_version": "1.0",
  "source": {
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    "kind": "arxiv",
    "version": 1
  }
}