Generation of deterministic multi-mode intensity squeezing in a train of ultra-short pulses by unbalanced SU(1,1) interferometers

• URL: http://arxiv.org/abs/2605.17798v2
• Date: Tue, 19 May 2026 02:47:09 GMT
• Title: Generation of deterministic multi-mode intensity squeezing in a train of ultra-short pulses by unbalanced SU(1,1) interferometers
• Abstract summary: We show multi-mode intensity squeezing localized in a train of short pulses with duration of $sim10$ ps.<n>Our investigations open the door for generating ultra-large scale quantum state by pulse pumped USUI.
• Score: 11.622902858495012
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The continuous variable quantum state generated by time-domain multiplexed optical parametric amplifier (OPA) is attractive because of the potential of enlarging the mode scale. Currently, the duration of temporal mode is longer than 100 ns since the OPA is pumped by the continuous wave laser, which restricts the scale of quantum state. Here we demonstrate multi-mode intensity squeezing localized in a train of short pulses with duration of $\sim10$ ps by using an unbalanced SU(1,1) interferometer (USUI), where the mode-locked laser is exploited as the pump and the time-domain multiplexing is realized by the combination of optical delay and nonlinear beam splitter. Using the pulse resolved joint measurements, we reveal the correlation structure of the state is unique and fundamentally different from previous approaches. Due to the globe quantum correlation, the intensity squeezing not only depends on the gain of OPAs but also ties to the mode number $M$ of joint measurement. We experimentally perform joint measurement among 30 modes and show the intensity noise lower than shot noise level by $\sim0.9$ dB is achievable for $M>10$. Our investigations open the door for generating ultra-large scale quantum state by pulse pumped USUI.

Related papers

• Multimode squeezed light generation and characterization [33.472667740906346]
  We study theoretically and experimentally the multimode squeezed light generated in type-0 and type-II OPA.<n>This work might have a significant impact on the realization of multimode quantum protocols.
  arXiv  Detail & Related papers  (2026-09-08T11:26:32Z)
• Experimental zero-added-loss multiplexing Bell-pair source for long-haul quantum networks [0.3908906925636173]
  We demonstrate entanglement swapping across 16 parallel frequency modes with a high average fidelity of 93.9$pm$SI1.4%.<n>The total swapping rate reaches 5.38$pm$0.17,sipairs,s-1, which corresponds to the ZALM Bell-pair rate of SI8.2e2pairs,s-1.
  arXiv  Detail & Related papers  (2026-08-19T08:18:15Z)
• Inverse Design of Quantum Control Sequences with Fourier Neural Operators [57.63590760083204]
  We introduce a Fourier Neural Operator (FNO)-based framework for learning high dimensional molecular quantum dynamics.<n>We develop the FNO pulse-measurement planner (FNO-SPMP), which constructs pulse sequences to purify an initially mixed Boltzmann distribution.<n>In a shared discrete control space, FNO-SPMP achieves nearly twice the success rate of a reinforcement-learning baseline.
  arXiv  Detail & Related papers  (2026-08-04T14:06:59Z)
• Single Spatio-Temporal Mode Bright Twin-Beam Source Across the Near- and Mid-Infrared [0.0]
  We introduce an ultrafast, bright, entangled twin-beam source generated by type-0 parametric down-conversion in periodically-poled lithium niobate at MHz repetition rate.<n>We show that in the bright few-mode limit, the total entanglement resource is clearly separated between modal and occupational degrees of freedom.
  arXiv  Detail & Related papers  (2026-05-14T20:15:37Z)
• Time-Multiplexed Distributed Quantum Sensing [0.0]
  Heisenberg scaling has been extended from $1/N2$ to $1/(NM)2$ in distributed quantum sensing.<n>We show that exploiting entanglement across temporal modes via time-domain multiplexing enables a scaling advantage with respect to $R$.
  arXiv  Detail & Related papers  (2026-03-19T11:57:38Z)
• Quantum $1/f^η$ Noise Induced Relaxation in the Spin-Boson Model [0.0]
  We extend the spin-boson model of open quantum systems to the regime of quantum $1/feta$ noise.<n>Our results apply to a qubit as an elementary building block of a quantum computer.
  arXiv  Detail & Related papers  (2025-07-18T19:13:20Z)
• Optimal Control of Spin Qudits Subject to Decoherence Using Amplitude-and-Frequency-Constrained Pulses [44.99833362998488]
  We introduce a formulation that allows us to bound the maximum amplitude and frequency of the signals. The pulses we obtain consistently enhance operation fidelities compared to those achieved with Schr"odinger's equation.
  arXiv  Detail & Related papers  (2024-03-23T10:10:38Z)
• Finite Pulse-Time Effects in Long-Baseline Quantum Clock Interferometry [45.73541813564926]
  We study the interplay of the quantum center-of-mass $-$ that can become delocalized $-$ together with the internal clock transitions. We show at the example of a Gaussian laser beam that the proposed quantum-clock interferometers are stable against perturbations from varying optical fields.
  arXiv  Detail & Related papers  (2023-09-25T18:00:03Z)
• Multi-mode quantum correlation generated from an unbalanced SU(1,1) interferometer using ultra-short laser pulses as pump [4.650938198826014]
  We theoretically investigate the multi-mode quantum correlation property of the optical fields generated from an unbalanced SU (1,1) interferometer pumped ultra-short pulses. Our result provides a comprehensive theoretical description on the quantum correlations generated from an unbalanced SU (1,1) interferometer within Gaussian system range.
  arXiv  Detail & Related papers  (2023-09-05T05:46:26Z)
• Two-mode squeezing over deployed fiber coexisting with conventional communications [55.41644538483948]
  Multi-mode squeezing is critical for enabling CV quantum networks and distributed quantum sensing. To date, multi-mode squeezing measured by homodyne detection has been limited to single-room experiments. This demonstration enables future applications in quantum networks and quantum sensing that rely on distributed multi-mode squeezing.
  arXiv  Detail & Related papers  (2023-04-20T02:29:33Z)
• Quantum emulation of the transient dynamics in the multistate Landau-Zener model [50.591267188664666]
  We study the transient dynamics in the multistate Landau-Zener model as a function of the Landau-Zener velocity. Our experiments pave the way for more complex simulations with qubits coupled to an engineered bosonic mode spectrum.
  arXiv  Detail & Related papers  (2022-11-26T15:04:11Z)
• Ultrabright and narrowband intra-fiber biphoton source at ultralow pump power [51.961447341691]
  Nonclassical photon sources of high brightness are key components of quantum communication technologies. We here demonstrate the generation of narrowband, nonclassical photon pairs by employing spontaneous four-wave mixing in an optically-dense ensemble of cold atoms within a hollow-core fiber.
  arXiv  Detail & Related papers  (2022-08-10T09:04:15Z)
• Comparison of the semiclassical and quantum optical field dynamics in a pulse-excited optical cavity with a finite number of quantum emitters [0.0]
  We study the spectral and temporal response of a set of $N$ quantum emitters embedded in a photonic cavity. Wigner functions of the light mode are calculated for different scenarios to analyze the quantum state of the light field.
  arXiv  Detail & Related papers  (2021-11-11T15:56:17Z)

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.