Continuous-variable quantum optical experiments in the time domain using squeezed states and heralded non-Gaussian states

Continuous-variable quantum information processing with optical field quadrature amplitudes is advantageous in deterministic creation of Gaussian entanglement. On the other hand, non-Gaussian state preparation and operation are currently limited, but heralding schemes potentially overcome this difficulty. Here, we summarize our recent progress in continuous-variable quantum optical experiments. In particular, we have recently succeeded in creation of ultra-large-scale cluster-type entanglement with full inseparability, multiplexed in the time domain; storage and on-demand release of heralded single-photon states, which is applied to synchronization of two heralded single-photon states; real-time quadrature measurements regarding non-Gaussian single-photon states with exponentially rising wavepackets; squeezing with relatively broader bandwidth by using triangle optical parametric oscillator.

[1]  P. Loock,et al.  Building Gaussian cluster states by linear optics , 2006, quant-ph/0610119.

[2]  S. Braunstein.  Squeezing as an irreducible resource , 1999, quant-ph/9904002.

[3]  Yu Shiozawa,et al.  Generation of one-million-mode continuous-variable cluster state by unlimited time-domain multiplexing , 2016, 1606.06688.

[4]  J Eisert,et al.  Positive Wigner functions render classical simulation of quantum computation efficient. , 2012, Physical review letters.

[5]  Hidehiro Yonezawa,et al.  Generating superposition of up-to three photons for continuous variable quantum information processing. , 2012, Optics express.

[6]  Karsten Danzmann,et al.  Detection of 15 dB Squeezed States of Light and their Application for the Absolute Calibration of Photoelectric Quantum Efficiency. , 2016, Physical review letters.

[7]  Shuntaro Takeda,et al.  Teleportation of Nonclassical Wave Packets of Light , 2011, Science.

[8]  Akira Furusawa,et al.  Creation, Storage, and On-Demand Release of Optical Quantum States with a Negative Wigner Function , 2013, 1309.3516.

[9]  Moritz Mehmet,et al.  High-bandwidth squeezed light at 1550 nm from a compact monolithic PPKTP cavity. , 2013, Optics express.

[10]  A. Furusawa,et al.  Noiseless Conditional Teleportation of a Single Photon. , 2014, Physical review letters.

[11]  Olivier Pfister,et al.  Experimental realization of multipartite entanglement of 60 modes of a quantum optical frequency comb. , 2013, Physical review letters.

[12]  Olivier Pfister,et al.  One-way quantum computing in the optical frequency comb. , 2008, Physical review letters.

[13]  Hidehiro Yonezawa,et al.  Real-Time Quadrature Measurement of a Single-Photon Wave Packet with Continuous Temporal-Mode Matching. , 2015, Physical review letters.

[14]  A. Lvovsky,et al.  Quantum state reconstruction of the single-photon Fock state. , 2001, Physical Review Letters.

[15]  Shota Yokoyama,et al.  Ultra-large-scale continuous-variable cluster states multiplexed in the time domain , 2013, Nature Photonics.

[16]  A. I. Lvovsky,et al.  Quantum-optical state engineering up to the two-photon level , 2009, 0908.4113.

[17]  Takeshi Toyama,et al.  Synchronization of optical photons for quantum information processing , 2015, Science Advances.

[18]  C. Fabre,et al.  Wavelength-multiplexed quantum networks with ultrafast frequency combs , 2013, Nature Photonics.

[19]  Akira Furusawa,et al.  Exploring a new regime for processing optical qubits: squeezing and unsqueezing single photons. , 2012, Physical review letters.

[20]  J. Preskill,et al.  Encoding a qubit in an oscillator , 2000, quant-ph/0008040.

[21]  Shuntaro Takeda,et al.  Deterministic quantum teleportation of photonic quantum bits by a hybrid technique , 2013, Nature.

[22]  G. Milburn,et al.  Quantum computation with optical coherent states , 2002, QELS 2002.

[23]  Rafael N. Alexander,et al.  One-way quantum computing with arbitrarily large time-frequency continuous-variable cluster states from a single optical parametric oscillator , 2015, 1509.00484.

[24]  Enzo,et al.  Creation and measurement of broadband squeezed vacuum from a ring optical parametric oscillator , 2016 .