Large conditional single-photon cross-phase modulation

Abstract

Deterministic optical quantum logic requires a nonlinear quantum process that alters the phase of a quantum optical state by $\pi$ through interaction with only one photon. Here, we demonstrate a large conditional cross-phase modulation between a signal field, stored inside an atomic quantum memory, and a control photon that traverses a high-finesse optical cavity containing the atomic memory. This approach avoids fundamental limitations associated with multimode effects for traveling optical photons. We measure a conditional cross-phase shift of up to $\pi /3$ between the retrieved signal and control photons, and confirm deterministic entanglement between the signal and control modes by extracting a positive concurrence. With a moderate improvement in cavity finesse, our system can reach a coherent phase shift of $\pi$ at low loss, enabling deterministic and universal photonic quantum logic.

22 pages, 5 figures, 1 table, includes supplementary information

References in corpus (7)

• Strong atom-field coupling for Bose-Einstein condensates in an optical cavity on a chip
• Nanophotonic quantum phase switch with a single atom
• A Quantum Gate between a Flying Optical Photon and a Single Trapped Atom
• Nonlinear pi phase shift for single fiber-guided photons interacting with a single atom
• Observation of optical-fiber Kerr nonlinearity at the single-photon level
• Observation and measurement of "giant" dispersive optical non-linearities in an ensemble of cold Rydberg atoms
• Partially Nondestructive Continuous Detection of Individual Traveling Optical Photons

Cited by in corpus (42)

• Microwave photonics with superconducting quantum circuits
• A photon-photon quantum gate based on a single atom in an optical resonator
• Optical $\pi$ Phase Shift Created with a Single-Photon Pulse
• Cavity quantum electrodynamics with color centers in diamond
• Quantum amplification and simulation of strong and ultrastrong coupling of light and matter
• A passive CPHASE gate via cross-Kerr nonlinearities
• Large Cross-Phase Modulations at the Few-Photon Level
• Electromagnetically induced transparency in circuit QED with nested polariton states
• Cross-Kerr nonlinearity for phonon counting
• Deterministic photonic quantum computation in a synthetic time dimension
• Measurement-induced strong Kerr nonlinearity for weak quantum states of light
• Measurement-device-independent quantum key distribution of multiple degrees of freedom of a single photon
• Coherent control and wave mixing in an ensemble of silicon vacancy centers in diamond
• Two photons co- and counter-propagating through $N$ cross-Kerr sites
• Generation of sub-MHz and spectrally-bright biphotons from hot atomic vapors with a phase mismatch-free scheme
• Single-atom single-photon coupling facilitated by atomic-ensemble dark-state mechanisms
• Few-photon all-optical phase rotation in a quantum-well micropillar cavity
• Dynamical Observations of Self-Stabilising Stationary Light
• Conditional $\pi$-Phase Shift of Single-Photon-Level Pulses at Room Temperature
• Tomography of optical polarization rotation induced by a quantum dot-cavity device
• Temporally-ultralong biphotons with a linewidth of 50 kHz
• Induced transparency: interference or polarization?
• Quantum theory of polarimetry: From quantum operations to Mueller matrices
• Efficient frequency conversion based on resonant four-wave mixing
• Nonlinear Quantum Optics in Optomechanical Nanoscale Waveguides
• Quantum frequency conversion based on resonant four-wave mixing
• Analytical results for a conditional phase shift between single-photon pulses in a nonlocal nonlinear medium
• Demonstration of spatial-light-modulation-based four-wave mixing in cold atoms
• Simultaneous Trapping of Two Optical Pulses in an Atomic Ensemble as Stationary Light Pulses
• Quantum fidelity of electromagnetically induced transparency: The full quantum theory
• Effect of laser frequency fluctuation on the decay rate of Rydberg coherence
• Cavity dark mode mediated by atom array without atomic scattering loss
• Heralded Interaction Control between Quantum Systems
• Single-photon characteristics of superposed weak coherent states
• Complete analysis of the maximally hyperentangled state via the weak cross-Kerr nonlinearity
• Continuous parametric feedback cooling of a single atom in an optical cavity
• Complete conversion between one and two photons in nonlinear waveguides with tailored dispersion
• Observation of cross phase modulation in cold atom gradient echo memory
• Memory-based Probabilistic Noiseless Amplification of Coherent states
• Quantum speedup from nonclassical polarization
• Complete analysis of hyperentangled Bell state in three degrees of freedom using Kerr effect and self-assisted mechanism
• An Intracavity Rydberg Superatom for Optical Quantum Engineering: Coherent Control, Single-Shot Detection and Optical $\pi$ Phase Shift