64 citations · 198 across the 13 of their papers we have counts for
13 papers
Quantum Optical Induced-Coherence Tomography by a Hybrid Interferometer
Eun Mi Kim, Sun Kyung Lee, Sang Min Lee +2
Quantum interferometry based on induced-coherence phenomena has demonstrated the possibility of undetected-photon measurements. Perturbation in the optical path of probe photons ca…
Estimation of photon number distribution and derivative characteristics of photon-pair sources
Sang Min Lee
The evaluation of a photon-pair source employs characteristic metrics like the photon-pair generation rate, heralding efficiency, and second-order correlation function, all of whic…
Experimental Learning of Pure Quantum States using Sequential Single-Shot Measurement Outcomes
Sang Min Lee, Hee Su Park, Jinhyoung Lee +2
We experimentally implement a machine-learning method for accurately identifying unknown pure quantum states. The method, called single-shot measurement learning, achieves the theo…
CHSH inequality test via disturbance-free measurement
Sang Min Lee, Minsu Kim, Heonoh Kim +2
We propose disturbance-free measurement using a "weak-value" scheme, in which a weakly measured quantum system is post-selected (to the initial state) to confirm that there is no d…
Two-photon interference of polarization-entangled photons in a Franson interferometer
Heonoh Kim, Sang Min Lee, Osung Kwon +1
We present two-photon interference experiments with polarization-entangled photon pairs in a polarization-based Franson-type interferometer. Although the two photons do not meet at…
Observation of two-photon interference effect with single non-photon-number resolving detector
Heonoh Kim, Sang Min Lee, Osung Kwon +1
Multiphoton interference effects can be measured with a single detector when two input photons are temporally well separated when compared with the dead time of the single-photon a…
Highly bright photon-pair generation in Doppler-broadened ladder-type atomic system
Yoon-Seok Lee, Sang Min Lee, Heonoh Kim +1
We report a bright photon-pair source with a coincidence counting rate per input power (cps/mW) of tens of thousands, obtained via spontaneous four-wave mixing from a Doppler-broad…
Two-photon interference of temporally separated photons
Heonoh Kim, Sang Min Lee, Han Seb Moon
We present experimental demonstrations of two-photon interference involving temporally separated photons within two types of interferometers: a Mach-Zehnder interferometer and a po…
Simultaneous measurement of HOM-like and N00N-like two-photon wavepackets in a Mach-Zehnder interferometer
Heonoh Kim, Sang Min Lee, Han Seb Moon
We propose and experimentally demonstrate two-photon interference effects in a Mach-Zehnder interferometer in which two different kinds of two-photon states are prepared by introdu…
Polarization-entangled photon-pair source obtained via type-II non-collinear SPDC process with PPKTP crystal
Sang Min Lee, Heonoh Kim, Myoungsik Cha +1
We demonstrate a polarization-entangled photon-pair source obtained via a type-II non-collinear quasi-phase-matched spontaneous parametric down-conversion process with a 10-mm peri…
Highly efficient source for frequency-entangled photon pairs generated in a 3rd order periodically poled MgO-doped stoichiometric LiTaO3 crystal
Heonoh Kim, Hee Jung Lee, Sang Min Lee +1
We present a highly efficient source for discrete frequency-entangled photon pairs based on spontaneous parametric down-conversion using 3rd order type-0 quasi-phase matching in a…
Equal-fidelity surface for a qubit state via equal-distance extended Bloch vectors and derivatives
Sang Min Lee, Heonoh Kim, Han Seb Moon
We describe and characterize an equal-fidelity surface in Bloch space targeted for a qubit state by means of equal-distance concept. The distance is generalized and defined as the…
Experimental demonstration of error-insensitive approximate universal-NOT gates
Sang Min Lee, Jeongho Bang, Heonoh Kim +3
We propose and experimentally demonstrate an approximate universal-NOT (U-NOT) operation that is robust against operational errors. In our proposal, the U-NOT operation is composed…