Quantum computer-enabled receivers for optical communication
arXiv:2309.15914 · doi:10.1088/2058-9565/ad5abb
Abstract
Optical communication is the standard for high-bandwidth information transfer in today's digital age. The increasing demand for bandwidth has led to the maturation of coherent transceivers that use phase- and amplitude-modulated optical signals to encode more bits of information per transmitted pulse. Such encoding schemes achieve higher information density, but also require more complicated receivers to discriminate the signaling states. In fact, achieving the ultimate limit of optical communication capacity, especially in the low light regime, requires coherent joint detection of multiple pulses. Despite their superiority, such joint detection receivers are not in widespread use because of the difficulty of constructing them in the optical domain. In this work we describe how optomechanical transduction of phase information from coherent optical pulses to superconducting qubit states followed by the execution of trained short-depth variational quantum circuits can perform joint detection of communication codewords with error probabilities that surpass all classical, individual pulse detection receivers. Importantly, we utilize a model of optomechanical transduction that captures non-idealities such as thermal noise and loss in order to understand the transduction performance necessary to achieve a quantum advantage with such a scheme. We also execute the trained variational circuits on an IBM-Q device with the modeled transduced states as input to demonstrate that a quantum advantage is possible even with current levels of quantum computing hardware noise.
10 pages + Appendices
References in corpus (22)
- Bidirectional and efficient conversion between microwave and optical light
- Quantum transduction of optical photons from a superconducting qubit
- Adiabatic State Conversion and Pulse Transmission in Optomechanical Systems
- Perspectives on quantum transduction
- Efficient bidirectional piezo-optomechanical transduction between microwave and optical frequency
- Microwave-to-optics conversion using a mechanical oscillator in its quantum groundstate
- Harnessing electro-optic correlations in an efficient mechanical converter
- Optical wavelength conversion of quantum states with optomechanics
- Structured optical receivers to attain superadditive capacity and the Holevo limit
- Efficient excitation of a two level atom by a single photon in a propagating mode
- Quantum receiver beyond the standard quantum limit of coherent optical communication
- Machine learning of noise-resilient quantum circuits
- Optical codeword demodulation with error rates below standard quantum limit using a conditional nulling receiver
- Using dark modes for high-fidelity optomechanical quantum state transfer
- Cavity quantum electro-optics: Microwave-telecom conversion in the quantum ground state
- Quantum-enabled interface between microwave and telecom light
- Optomechanical ground-state cooling in a continuous and efficient electro-optic transducer
- Approaching optimal entangling collective measurements on quantum computing platforms
- Achieving minimum-error discrimination of an arbitrary set of laser-light pulses
- Near optimal discrimination of binary coherent signals via atom-light interaction
- Membrane-in-the-middle optomechanics with a soft-clamped membrane at milliKelvin temperatures
- Demonstration of quantum advantage by a joint detection receiver for optical communications using quantum belief propagation on a trapped-ion device