Ultrastable, low-error dynamic polarization encoding of deterministically generated single photons

• URL: http://arxiv.org/abs/2507.16578v1
• Date: Tue, 22 Jul 2025 13:29:54 GMT
• Title: Ultrastable, low-error dynamic polarization encoding of deterministically generated single photons
• Authors: Joscha Hanel, Zenghui Jiang, Jipeng Wang, Frederik Benthin, Tom Fandrich, Eddy Patrick Rugeramigabo, Raphael Joos, Michael Jetter, Simone Luca Portalupi, Jingzhong Yang, Michael Zopf, Peter Michler, Fei Ding,
• Abstract summary: We report on the first demonstration of a polarization encoder for single-photon qubits based on a free-space Sagnac interferometer.<n>A quantum bit error rate of 0.69(2)% is achieved, marking the lowest error rate reported to date for high-speed information encoding on single photons.
• Score: 0.9604873746965816
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The ability to inscribe information on single photons at high speeds is a crucial requirement for quantum applications such as quantum communication and measurement-based photonic quantum computation. Nowadays, most experimental implementations employ phase modulators in single-pass, Mach-Zehnder interferometer or Michelson interferometer configurations to encode information on photonic qubits. However, these approaches are intrinsically sensitive to environmental influences, limiting the achievable quantum error rates in practice. We report on the first demonstration of a polarization encoder for single-photon qubits based on a free-space Sagnac interferometer, showcasing inherent phase stability and overcoming previous error rate limitations. Telecom-wavelength single photons emitted by a quantum dot are modulated by the encoder under a repetition rate of 152 MHz. A quantum bit error rate of 0.69(2)% is achieved, marking the lowest error rate reported to date for high-speed information encoding on single photons. This work represents a key advance towards robust, scalable, and low-error quantum information processing with single photon sources.

Related papers

• Optimizing the quantum interference between single photons and local oscillator with photon correlations [0.0]
  We report on two homodyne photon-correlation techniques enabling the precise measurement of the overlap between a single photon generated by a quantum dot-cavity device and pulsed laser light.<n>The different statistics of interfering fields lead to specific signatures of the quantum interference on the photon correlations at the output of the interfering beam splitter.<n>We compare the behavior of maximized overlap, measuring either the Hong-Ou-Mandel visibility between both outputs or the photon bunching at a single output.
  arXiv  Detail & Related papers  (2025-04-16T14:19:51Z)
• Cryogenic Feedforward of a Photonic Quantum State [0.6819010383838326]
  Modulation conditioned on measurements on entangled photonic quantum states is a cornerstone technology of optical quantum information processing. We demonstrate low-latency feedforward using a quasi-photon-number-resolved measurement on a quantum light source. This represents an important benchmark for the fastest quantum photonic feedforward experiments.
  arXiv  Detail & Related papers  (2024-10-11T15:29:15Z)
• On-demand shaped photon emission based on a parametrically modulated qubit [18.600099693095995]
  A single-rail and dual-rail time-bin shaped photon generator can act as a quantum interface of a point-to-point quantum network.<n>We develop an efficient photon field measurement setup based on the data stream processing of GPU.<n>The results demonstrate that our method is hardware efficient, simple to implement, and scalable.
  arXiv  Detail & Related papers  (2024-05-02T16:53:54Z)
• All-optical modulation with single-photons using electron avalanche [66.27103948750306]
  We demonstrate all-optical modulation enabled by electron avalanche process in silicon.<n>Our approach opens the possibility of gigahertz-speed, and potentially even faster, optical switching at the single-photon level.
  arXiv  Detail & Related papers  (2023-12-18T20:14:15Z)
• Experimental realization of deterministic and selective photon addition in a bosonic mode assisted by an ancillary qubit [33.7054351451505]
  Bosonic quantum error correcting codes are primarily designed to protect against single-photon loss.<n>Error correction requires a recovery operation that maps the error states -- which have opposite parity -- back onto the code states.<n>Here, we realize a collection of photon-number-selective, simultaneous photon addition operations on a bosonic mode.
  arXiv  Detail & Related papers  (2022-12-22T23:32:21Z)
• Integrated Quantum Optical Phase Sensor [48.7576911714538]
  We present a photonic integrated circuit fabricated in thin-film lithium niobate. We use the second-order nonlinearity to produce a squeezed state at the same frequency as the pump light and realize circuit control and sensing with electro-optics. We anticipate that on-chip photonic systems like this, which operate with low power and integrate all of the needed functionality on a single die, will open new opportunities for quantum optical sensing.
  arXiv  Detail & Related papers  (2022-12-19T18:46:33Z)
• On-chip quantum information processing with distinguishable photons [55.41644538483948]
  Multi-photon interference is at the heart of photonic quantum technologies. Here, we experimentally demonstrate that detection can be implemented with a temporal resolution sufficient to interfere photons detuned on the scales necessary for cavity-based integrated photon sources. We show how time-resolved detection of non-ideal photons can be used to improve the fidelity of an entangling operation and to mitigate the reduction of computational complexity in boson sampling experiments.
  arXiv  Detail & Related papers  (2022-10-14T18:16:49Z)
• Resolution of 100 photons and quantum generation of unbiased random numbers [0.0]
  Quantum detection of light is mostly relegated to the microscale. The ability to perform measurements to resolve photon numbers is highly desirable for a variety of quantum information applications. In this work, we extend photon measurement into the mesoscopic regime by implementing a detection scheme based on multiplexing highly quantum-efficient transition-edge sensors.
  arXiv  Detail & Related papers  (2022-05-02T21:34:01Z)
• Dispersive optical systems for scalable Raman driving of hyperfine qubits [45.82374977939355]
  We introduce a new method for generating amplitude modulation by phase modulating a laser. This approach is passively stable, offers high efficiency, and is compatible with high-power laser sources. We benchmark this new approach by globally driving an array of $sim 300$ neutral $87$Rb atomic qubits trapped in optical tweezers.
  arXiv  Detail & Related papers  (2021-10-27T18:00:00Z)
• Scalable multiphoton quantum metrology with neither pre- nor post-selected measurements [0.0]
  We experimentally demonstrate a scalable protocol for quantum-enhanced optical phase estimation. The robustness of two-mode squeezed vacuum states against loss allows us to outperform schemes based on N00N states. Our work is important for quantum technologies that rely on multiphoton interference.
  arXiv  Detail & Related papers  (2020-11-04T18:11:33Z)
• A bright and fast source of coherent single photons [46.25143811066789]
  A single photon source is a key enabling technology in device-independent quantum communication. We report a single photon source with an especially high system efficiency.
  arXiv  Detail & Related papers  (2020-07-24T17:08:46Z)
• Near-ideal spontaneous photon sources in silicon quantum photonics [55.41644538483948]
  Integrated photonics is a robust platform for quantum information processing. Sources of single photons that are highly indistinguishable and pure, that are either near-deterministic or heralded with high efficiency, have been elusive. Here, we demonstrate on-chip photon sources that simultaneously meet each of these requirements.
  arXiv  Detail & Related papers  (2020-05-19T16:46:44Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.