Pith Number

pith:4GWYORFQ

pith:2026:4GWYORFQQJPBMYR43BZCPZOLZO

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Loss-induced quantum nonreciprocity and entanglement in superconducting qubits

Peng-Bo Li, Yu-Meng Ren

Loss in auxiliary cavities can induce nonreciprocal coupling and entanglement between two remote superconducting qubits through direction-dependent interference.

arxiv:2605.11457 v1 · 2026-05-12 · quant-ph

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Record completeness

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4 Citations open

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Claims

C1strongest claim

We show that this loss-induced scheme can generate nonreciprocal quantum entanglement, indicating that loss can be utilized as a resource. Moreover, the tunability of nonreciprocity and nonreciprocal entanglement in our scheme can be manipulated by the relative phase induced by loss.

C2weakest assumption

The coherent phases associated with the qubit-resonator couplings reverse sign under propagation reversal, while the loss-induced phases remain direction independent. Their combined effect leads to different interference conditions in the opposite directions.

C3one line summary

Loss-induced phases in auxiliary cavities create asymmetric interference, yielding tunable nonreciprocal couplings and entanglement between remote transmon qubits.

References

153 extracted · 153 resolved · 0 Pith anchors

[1] The con- necting modes are described by: ˆHc = P2 n=1 ω(n) c ˆc(n)†ˆc(n) withω (n) c the frequencies of the connecting modes

[2] i (A5) whereδω(t) =ω m(t)−ω 0 =A 1 cos(ωd1t+ψ 1) + A2 cos(ωd2t+ψ 2)and∆ (n) 0 =ω 0 −ω (n) c is the bare de- tuning of then-th connecting mode from the rotating frame frequencyω 0

[3] The trans- formation is given by the unitary operator ˆUm(t) = Texp h −i R t 0 δω(τ)dτ i

[4] Interaction picture with respect to the bare detuning Then we introduce an interaction picture associate with the bare connecting mode detuning: ˆU∆0(t) = exp " i 2X n=1 ∆(n) 0 ˆc(n)†ˆc(n)t # .(A8) An

[5] ∞X k=−∞ Jk A1 ωd1 eik(ωd1t+ψ1) # ·

Receipt and verification

First computed	2026-05-27T01:05:56.882770Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1ad8744b0825e16623cd87227e5cbcba55118973e853e71f0836d53f19f4ac0

Aliases

arxiv: 2605.11457 · arxiv_version: 2605.11457v1 · doi: 10.48550/arxiv.2605.11457 · pith_short_12: 4GWYORFQQJPB · pith_short_16: 4GWYORFQQJPBMYR4 · pith_short_8: 4GWYORFQ

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/4GWYORFQQJPBMYR43BZCPZOLZO \
  | 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: e1ad8744b0825e16623cd87227e5cbcba55118973e853e71f0836d53f19f4ac0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "feb11050e53bbca6691ced8733c630e7c6c8f33355d8baa0471e808f11143b67",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-05-12T03:14:35Z",
    "title_canon_sha256": "7c3ec86f353a298b77acbd6a83331a86629a3f3fbf47d9d9ae6e2e5c862639b3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.11457",
    "kind": "arxiv",
    "version": 1
  }
}