Experimental demonstration of a directionally-unbiased linear-optical multiport
arXiv:1810.02033 · doi:10.1364/OE.26.027201
Abstract
All existing optical quantum walk approaches are based on the use of beamsplitters and multiple paths to explore the multitude of unitary transformations of quantum amplitudes in a Hilbert space. The beamsplitter is naturally a directionally biased device: the photon cannot travel in reverse direction. This causes rapid increases in optical hardware resources required for complex quantum walk applications, since the number of options for the walking particle grows with each step. Here we present the experimental demonstration of a directionally-unbiased linear-optical multiport, which allows reversibility of photon direction. An amplitude-controllable probability distribution matrix for a unitary three-edge vertex is reconstructed with only linear-optical devices. Such directionally-unbiased multiports allow direct execution of quantum walks over a multitude of complex graphs and in tensor networks. This approach would enable simulation of complex Hamiltonians of physical systems and quantum walk applications in a more efficient and compact setup, substantially reducing the required hardware resources.
References in corpus (16)
- Quantum random walks - an introductory overview
- Universal Linear Optics
- Universal computation by quantum walk
- Quantum walks of correlated particles
- Boson Sampling on a Photonic Chip
- Multidimensional quantum entanglement with large-scale integrated optics
- Experimental boson sampling in arbitrary integrated photonic circuits
- Discrete single-photon quantum walks with tunable decoherence
- A positive tensor network approach for simulating open quantum many-body systems
- Three-photon bosonic coalescence in an integrated tritter
- Multi-photon quantum interference in a multi-port integrated photonic device
- Scattering theory and discrete-time quantum walks
- Quantum simulation of bosonic-fermionic non-interacting particles in disordered systems via quantum walk
- Group transformations and entangled-state quantum gates with directionally unbiased linear-optical multiports
- Quantum simulation of discrete-time Hamiltonians using directionally unbiased linear optical multiports
- Quantum simulation of topologically protected states using directionally unbiased linear-optical multiports
Cited by in corpus (10)
- Quantum-Clustered Two-Photon Walks
- Implementation of a 3 x 3 directionally-unbiased linear optical multiport
- Enhanced-sensitivity interferometry with phase-sensitive unbiased multiports
- Higher-dimensional Hong-Ou-Mandel effect and state redistribution with linear-optical multiports
- Controllable entangled state distribution in a dual-rail reconfigurable optical network
- Interferometry and higher-dimensional phase measurements using directionally unbiased linear optics
- Directionally-Unbiased Unitary Optical Devices in Discrete-Time Quantum Walks
- Experimental demonstration of a Grover-Michelson interferometer
- Next-generation interferometry with gauge-invariant linear optical scatterers
- Deterministic linear-optical computing with symmetry-based qubits