Split-ring polariton condensates as macroscopic two-level quantum systems

Abstract

Superposition states of circular currents of exciton-polaritons mimic the superconducting flux qubits. The phase of a polariton fluid must change by an integer number of $2\pi$, when going around the ring. If one introduces a $\pi$-phase delay line in the ring, the fluid is obliged to propagate a clockwise or anticlockwise circular current to reduce the total phase gained over one round-trip to zero or to build it up to $2\pi$. We show that such a $\pi$-delay line can be provided by a dark soliton pinned to a potential well created by a C-shape non-resonant pump-spot. The resulting split-ring polariton condensates exhibit pronounced coherent oscillations passing periodically through clockwise and anticlockwise current states. These oscillations may persist far beyond the coherence time of polariton condensates. The qubits based on split-ring polariton condensates are expected to possess very high figures of merit that makes them a valuable alternative to superconducting qubits. The use of the dipole-polarized polaritons allows to control coherently the state of the qubit with the external electric field. This is shown to be one of the tools for realization of single-qubit logic operations. We propose the design of an $i$SWAP gate based on a pair of coupled polariton qubits. To demonstrate the capacity of the polariton platform for quantum computations, we propose a protocol for the realization of the Deutsch's algorithm with polariton qubit networks.

arXiv comment18 pages, 15 figures

References in corpus (50)

• Supplementary information for "Quantum supremacy using a programmable superconducting processor"
• Cold bosonic atoms in optical lattices
• Probing many-body dynamics on a 51-atom quantum simulator
• Quantum fluids of light
• A Quantum Engineer's Guide to Superconducting Qubits
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Observation of a Many-Body Dynamical Phase Transition with a 53-Qubit Quantum Simulator
• Universal Quantum Computation with the Exchange Interaction
• A >99.9%-fidelity quantum-dot spin qubit with coherence limited by charge noise
• Experimental realization of a quantum algorithm
• Self-Verifying Variational Quantum Simulation of the Lattice Schwinger Model
• Efficient Z-Gates for Quantum Computing
• Quantum CNOT Gate for Spins in Silicon
• Quantum Kibble-Zurek mechanism and critical dynamics on a programmable Rydberg simulator
• Boson sampling with 20 input photons in 60-mode interferometers at $10^{14}$ state spaces
• Propagating phonons coupled to an artificial atom
• Polariton superfluids reveal quantum hydrodynamic solitons
• A blueprint for demonstrating quantum supremacy with superconducting qubits
• Realizing the $XY$ Hamiltonian in polariton simulators
• Implementation of a Quantum Algorithm to Solve Deutsch's Problem on a Nuclear Magnetic Resonance Quantum Computer
• Damping of Exciton Rabi Rotations by Acoustic Phonons in Optically Excited InGaAs/GaAs Quantum Dots
• Optical circuits based on Polariton Neurons in Semiconductor Microcavities
• Blueprint for a microwave trapped-ion quantum computer
• Coherent Oscillations in an Exciton-Polariton Josephson Junction
• Single vortex-antivortex pair in an exciton polariton condensate
• Natural two-qubit gate for quantum computation using the XY interaction
• Quantum correlations of confined exciton-polaritons
• Semiconductor Quantum Computation
• Experimental application of decoherence-free subspaces in a quantum-computing algorithm
• Superfluidity and Swallowtails; Hysteretic Behavior in Bose Condensates
• Stochastic classical field model for polariton condensates
• Experimental Realization of Deutsch's Algorithm in a One-way Quantum Computer
• Ultrafast control of Rabi oscillations in a polariton condensate
• Interferometric measurement of the current-phase relationship of a superfluid weak link
• Proposal for a Mesoscopic Optical Berry-Phase Interferometer
• Frequency combs with weakly lasing exciton-polariton condensates
• Spin-Flipping Half Vortex in a Macroscopic Polariton Spinor Ring Condensate
• Electrically tunable artificial gauge potential for polaritons
• Fluxon readout of a superconducting qubit
• A Polariton Graph Simulator
• Persistent currents with non-quantized angular momentum
• Optically trapped polariton condensates as semiclassical time crystals
• Coherence properties of the microcavity polariton condensate
• Persistent circular currents of exciton-polaritons in cylindrical pillar microcavities
• Realizing and optimizing an atomtronic SQUID
• Observation of Non-equilibrium Motion and Equilibration in Polariton Rings
• Superfluid currents in half-moon polariton condensates
• Tunneling of persistent currents in coupled ring-shaped Bose-Einstein condensates
• Emergence of micro-frequency comb via limit cycles in dissipatively coupled condensates
• The optical control of phase locking of polariton condensates

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• Classical analog of qubit logic based on a magnon Bose-Einstein condensate
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• Femtosecond dynamics of a polariton bosonic cascade at room temperature
• Evolution of room-temperature magnon gas toward coherent Bose-Einstein condensate
• Qubit Analog with Polariton Superfluid in an Annular Trap
• Non-reciprocal Exciton-Polariton Ring Lattices
• Control of the Bose-Einstein Condensation of Magnons by the Spin-Hall Effect
• Steady state oscillations of circular currents in concentric polariton condensates
• Multiple higher-order topological phases with even and odd pairs of zero-energy corner modes in a $C_3$ symmetry broken model
• Narrow-linewidth exciton-polariton laser
• Spin resonance induced by a mechanical rotation of a polariton condensate
• Persistent polarization oscillations in ring-shape polariton condensates
• Pseudo-conservative dynamics of coupled polariton condensates
• Structuring co- and counter-flowing currents of polariton condensates in concentric ring-shaped potentials
• Exciton-polariton ring Josephson junction
• PHOENIX -- Paderborn highly optimized and energy efficient solver for two-dimensional nonlinear Schrödinger equations with integrated extensions
• Symmetry breaking and superfluid currents in a split-ring spinor polariton condensate
• Bose-Einstein Condensation of Photons in a Four-Site Quantum Ring
• Adiabatic theory of one-dimensional curved polariton waveguides
• Thermodynamics and State Preparation in a Two-State System of Light