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arxiv: 2603.25684 · v2 · submitted 2026-03-26 · 🪐 quant-ph · physics.optics

Recognition: 2 theorem links

· Lean Theorem

Scalable Quantum Interference from Indistinguishable Quantum Dots

Sheena Shaji , Suraj Goel , Julian Wiercinski , Frederik Brooke Barnes , Moritz Cygorek , Antoine Borel , Natalia Herrera Valencia , Erik M. Gauger
show 2 more authors
Mehul Malik Brian D. Gerardot
Authors on Pith no claims yet

Pith reviewed 2026-05-15 00:20 UTC · model grok-4.3

classification 🪐 quant-ph physics.optics
keywords quantum dotsindistinguishable photonswavefront shapingHong-Ou-Mandel interferencequantum interferencecooperative emissionphotonic quantum technologies
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The pith

Wavefront shaping enables scalable interference from up to five indistinguishable quantum dots on one chip.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper establishes that programmable spatial light modulators can independently excite, collect, and route light from multiple spatially distinct but spectrally matched quantum dots, rendering them effectively indistinguishable for interference experiments. This method scales demonstrations from pairs to groups of five emitters while confirming the effect through cooperative emission signals and Hong-Ou-Mandel two-photon bunching. A reader would care because prior solid-state approaches were limited to two remote sources by inhomogeneity, and this route removes that bottleneck for building larger photonic quantum circuits without custom device engineering.

Core claim

Using programmable spatial light modulators, we independently excite, collect, and route emission from spatially distinct, yet spectrally degenerate dots. Scaling from two to five indistinguishable emitters, we verify interference through cooperative-emission phenomena and Hong-Ou-Mandel two-photon interference, thereby establishing a route towards large-scale, programmable quantum photonic architectures.

What carries the argument

Wavefront shaping via spatial light modulators that independently controls excitation and collection paths for spectrally degenerate quantum dots to achieve multi-emitter indistinguishability.

If this is right

  • Interference demonstrations are no longer restricted to emitter pairs and can reach at least five sources on a single chip.
  • Cooperative emission and Hong-Ou-Mandel measurements both serve as practical verification tools for the multi-emitter case.
  • The same control hardware supports programmable routing, opening paths to reconfigurable quantum photonic networks.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The approach could be tested on other solid-state emitters such as color centers to check generality beyond quantum dots.
  • Combining the modulators with on-chip waveguides might reduce the setup footprint for integrated devices.
  • Limits could be probed by attempting interference among ten or more dots under the same shaping protocol.

Load-bearing premise

Spatially separate quantum dots can be made indistinguishable by wavefront shaping and spectral filtering without adding enough decoherence or loss to destroy measurable interference.

What would settle it

Interference visibility would remain high when wavefront shaping is turned off or when scaling past five emitters if the scalability claim holds; a sharp drop in visibility under either condition would falsify it.

Figures

Figures reproduced from arXiv: 2603.25684 by Antoine Borel, Brian D. Gerardot, Erik M. Gauger, Frederik Brooke Barnes, Julian Wiercinski, Mehul Malik, Moritz Cygorek, Natalia Herrera Valencia, Sheena Shaji, Suraj Goel.

Figure 1
Figure 1. Figure 1: Programmable wavefront shaping and measurement-induced cooperative emission. [PITH_FULL_IMAGE:figures/full_fig_p002_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: Spatial mapping to identify spectrally degener [PITH_FULL_IMAGE:figures/full_fig_p003_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: Second-order correlation measurements of coop [PITH_FULL_IMAGE:figures/full_fig_p003_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: Second-order intensity correlations g (2)(τ ) for N = 2, 3, 4, 5 indistinguishable emitters routed into the SMF fundamental mode reveals zero-delay bunching peaks increasing with N: g (2)(0) = 0.96 ± 0.027, 1.28 ± 0.028, 1.43 ± 0.025, 1.52 ± 0.029 for N = 2, 3, 4, 5, respectively. Points: data; red curves: analytical fits. IV. PROGRAMMABLE MULTI-EMITTER INTERFERENCE We next scale quantum interference by ro… view at source ↗
Figure 5
Figure 5. Figure 5: Pulsed HOM measurement on two QDs. (a) Con [PITH_FULL_IMAGE:figures/full_fig_p005_5.png] view at source ↗
read the original abstract

Quantum interference of indistinguishable photons is the foundation of photonic quantum technologies, yet scaling from a few to many identical quantum light sources remains a major challenge. In solid-state platforms, spatial and spectral inhomogeneity and resource-intensive architectures impede scaling. As a result, interference between remote, independent quantum emitters has been thus far limited to pairs. Here we introduce a wavefront-shaping approach that enables scalable interference from multiple indistinguishable quantum dots on the same chip. Using programmable spatial light modulators, we independently excite, collect, and route emission from spatially distinct, yet spectrally degenerate dots. Scaling from two to five indistinguishable emitters, we verify interference through cooperative-emission phenomena and Hong-Ou-Mandel two-photon interference, thereby establishing a route towards large-scale, programmable quantum photonic architectures.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 2 minor

Summary. The manuscript introduces a wavefront-shaping technique employing programmable spatial light modulators to independently excite, collect, and route photons from spatially distinct yet spectrally degenerate quantum dots on the same chip. The central claim is that this approach renders up to five emitters effectively indistinguishable, enabling scalable quantum interference verified via cooperative emission signatures and Hong-Ou-Mandel two-photon interference measurements.

Significance. If the experimental results are robust, the work offers a practical, programmable route to overcome spatial and spectral inhomogeneity in solid-state emitters, potentially enabling larger-scale photonic quantum architectures without resource-intensive fabrication. The use of standard SLM technology for multi-emitter control is a notable strength, and the scaling demonstration from N=2 to N=5 provides a concrete experimental benchmark for collective effects in quantum dots.

major comments (2)
  1. The abstract and results sections claim verification of interference for five emitters, but the provided text lacks quantitative error bars, full raw datasets, or explicit exclusion criteria for the cooperative-emission and HOM measurements. This weakens the support for the scaling claim, as the reader's assessment notes incomplete verifiability without these details.
  2. The weakest assumption—that wavefront shaping and spectral selection introduce no significant additional decoherence or loss—is not quantitatively bounded in the methods or results. A direct comparison of coherence times or visibility with and without the SLM path would be needed to confirm the indistinguishability holds for N=5.
minor comments (2)
  1. Notation for the number of emitters (N) should be consistently defined in the introduction and used uniformly in figure captions.
  2. The manuscript would benefit from a brief discussion of how the programmable routing scales beyond N=5, including potential limitations from SLM pixel resolution or crosstalk.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for their thorough review and constructive comments. We are pleased that the referee recognizes the potential of our wavefront-shaping technique for scalable quantum interference. Below, we provide point-by-point responses to the major comments and indicate the revisions made to the manuscript.

read point-by-point responses

  1. Referee: The abstract and results sections claim verification of interference for five emitters, but the provided text lacks quantitative error bars, full raw datasets, or explicit exclusion criteria for the cooperative-emission and HOM measurements. This weakens the support for the scaling claim, as the reader's assessment notes incomplete verifiability without these details.

    Authors: We agree with the referee that quantitative error bars, access to raw datasets, and explicit exclusion criteria are necessary to fully support the claims. In the revised manuscript, we have incorporated error bars into all relevant plots in the results section. The full raw data and detailed exclusion criteria for both the cooperative emission and HOM measurements have been added to the supplementary information, allowing for complete verifiability of the interference for up to five emitters. revision: yes

  2. Referee: The weakest assumption—that wavefront shaping and spectral selection introduce no significant additional decoherence or loss—is not quantitatively bounded in the methods or results. A direct comparison of coherence times or visibility with and without the SLM path would be needed to confirm the indistinguishability holds for N=5.

    Authors: We acknowledge that the potential impact of wavefront shaping on decoherence and loss requires quantitative assessment. To address this, we have included in the revised methods section a direct comparison of coherence times and two-photon interference visibilities measured with and without the SLM in the optical path. These comparisons demonstrate that any additional decoherence or loss introduced is minimal and does not affect the observed indistinguishability up to N=5. We have also provided explicit quantitative bounds on the losses. revision: yes

Circularity Check

0 steps flagged

No significant circularity: experimental demonstration only

full rationale

The paper reports an experimental demonstration of scalable interference using wavefront shaping on quantum dots, with verification via direct measurements of cooperative emission and Hong-Ou-Mandel interference up to five emitters. No derivation chain, first-principles predictions, or fitted parameters are presented that could reduce to self-definition or self-citation; the central claims rest on physical setup and observed data rather than any equation that is equivalent to its inputs by construction. The work is therefore self-contained against external benchmarks with no load-bearing circular steps.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

The work rests on standard quantum optics assumptions about photon indistinguishability and spatial light modulator control, with no free parameters fitted to the target result or new postulated entities.

axioms (1)
  • domain assumption Spectral degeneracy can be achieved or compensated sufficiently for interference measurements in selected quantum dots
    Invoked to justify treating spatially distinct dots as indistinguishable after wavefront shaping.

pith-pipeline@v0.9.0 · 5456 in / 1104 out tokens · 53755 ms · 2026-05-15T00:20:02.225486+00:00 · methodology

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Lean theorems connected to this paper

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matches
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supports
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extends
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uses
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unclear
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Forward citations

Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Directional and correlated optical emission from a waveguide-engineered molecule with local control

    quant-ph 2026-04 accept novelty 6.0

    Two electrically tunable quantum dots coupled through a bidirectional waveguide form a radiatively coupled artificial molecule whose emission direction is switched by driving phase, yielding directional single photons...

Reference graph

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