735 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Seoul National UniversityKR84 papers
- Sungkyunkwan UniversityKR72 papers
- Chonnam National UniversityKR66 papers
- Universidad Autónoma de MadridES61 papers
- Institute for Basic ScienceKR56 papers
- High Energy Accelerator Research OrganizationJP53 papers
- Kyoto UniversityJP49 papers
- The University of TokyoJP48 papers
- Stony Brook UniversityUS47 papers
- Kavli Institute for the Physics and Mathematics of the UniverseJP46 papers
- University of California, IrvineUS46 papers
- University of Hawaii SystemUS46 papers
29 papers · 1 filter
Time-dependent Hamiltonians and Geometry of Operators Generated by Them
Kunal Pal, Kuntal Pal
We obtain the complexity geometry associated with the Hamiltonian of a quantum mechanical system, specifically in cases where the Hamiltonian is explicitly time-dependent. Using Ni…
The origin of Franson-type nonlocal correlation
B. S. Ham
Franson-type nonlocal correlation is for the second-order intensity fringes measured between two remotely separated photons via coincidence detection, whereas their locally measure…
A quantum ring gyroscope based on coherence de Broglie waves
Byoung S. Ham
In a Mach-Zenhder interferometer (MZI), the highest precision for a measurement error is given by vacuum fluctuations of quantum mechanics, resulting in a shot noise limit1,2,3,4,5…
The origin of indistinguishability of quantum features in an interferometric system
Byoung S. Ham
One of the most fundamental quantum features is the two-photon intensity correlation on a beam splitter, resulting in photon bunching into either output port. According to the conv…
Deterministic quantum correlation between coherently paired photons acting on a beam splitter
B. S. Ham
Quantum technologies based on the particle nature of a photon has been progressed over the last several decades, where the fundamental quantum features of entanglement have been te…
Experimental demonstrations for randomness-based macroscopic Franson-type nonlocal correlation using coherently coupled photons
S. Kim, B. S. Ham
Franson-type nonlocal quantum correlation based on the particle nature of quantum mechanics has been intensively studied for both fundamental physics and potential applications of…
Observations of near-perfect nonclassical correlation using coherent light
Sangbae Kim, Byoung S. Ham
Complementarity theory is the essence of the Copenhagen interpretation. Since the Hanbury Brown and Twiss experiments, the particle nature of photons has been intensively studied f…
Macroscopic randomness for quantum entanglement generation
Byoung S. Ham
Quantum entanglement between two or more bipartite entities is a core concept in quantum information areas limited to microscopic regimes directly governed by Heisenberg uncertaint…
The role of quantum superposition in a coupled interferometric system for macroscopic quantum feature generations
Byoung S. Ham
Quantum entanglement is the quintessence of quantum information processing mostly limited to the microscopic regime governed by Heisenberg uncertainty principle. For practical appl…
Coherently controlled quantum features in a coupled interferometric scheme
B. S. Ham
Over the last several decades, entangled photon pairs generated by spontaneous parametric down conversion processes in both second-order and third-order nonlinear optical materials…
High resolution, High contrast optical interface for defect qubits
Jong Sung Moon, Haneul Lee, Jin Hee Lee +10
Point defects in crystals provide important building blocks for quantum applications. To initialize, control, and read-out their quantum states, an efficient optical interface for…
Macroscopically entangled light fields: A quantum laser
Byoung S. Ham
A novel method of macroscopically entangled light-pair generation is presented for a quantum laser using randomness-based deterministic phase control of coherent light in a Mach-Ze…
Deterministic quantum correlation in an interferometric scheme
Byoung S. Ham
Over the last several decades, entangled photon pairs generated from \c{hi}^((2)) nonlinear optical materials via spontaneous parametric down conversion processes have been intensi…
Phase noise-immune unconditionally secured classical key distribution using doubly coupled Mach-Zehnder interferometer
Byoung S. Ham
Recently, new physics for unconditional security in a classical key distribution (USCKD) in a frame of a double Mach-Zehnder interferometer has been proposed and demonstrated as a…
Analysis of nonclasscial features in a coupled macroscopic binary system
Byoung S. Ham
Nonclassical phenomena of quantum mechanics such as anticorrelation and photonic de Broglie waves (PBWs) have been recently understood as a special case of coherence optics with a…
Observations of coherence de Broglie waves
Byoung S. Ham
Photonic de Broglie waves (PBWs) via two-mode entangled photon pair interactions on a beam splitter show a pure quantum feature which cannot be obtained by classical means1-4. Alth…
Deterministic control of photonic de Broglie waves using coherence optics: Coherence de Broglie waves
B. S. Ham
In quantum mechanics, photonic de Broglie waves have been understood as a unique property of quantum mechanics satisfying the complementarity between particle and wave natures of l…
The origin of anticorrelation for photon bunching on a beam splitter
B. S. Ham
The Copenhagen interpretation has been long-lasted, whose core concepts are in the Heisenberg's uncertainty principle and nonlocal correlation of EPR. The second-order anticorrelat…
Instantaneous ionization rate as a functional derivative
I. A. Ivanov, C. Hofmann, L. Ortmann +3
We describe an approach defining instantaneous ionization rate (IIR) as a functional derivative of the total ionization probability. The definition is based on physical quantities…
Wavelength convertible quantum memory satisfying ultralong photon storage and near perfect retrieval efficiency
Byoung S. Ham
Quantum coherence control is presented for wavelength convertible quantum memory in a double-lambda-type solid ensemble whose spin states are inhomogeneously broadened. Unlike typi…
Understanding of collective atom phase control in modified photon echoes for a near perfect, storage time extended quantum memory
Rahmatullah, B. S. Ham
A near perfect, storage time-extended photon echo-based quantum memory protocol has been analyzed by solving the Maxwell-Bloch equations for a backward scheme in a three-level syst…
Gaussian pulse-induced imperfect rephasing in coherent transients
B. S. Ham
A double-rephasing photon-echo (DRPE) scheme inherently satisfies no-population inversion condition for quantum memory applications, while the resultant absorptive coherence prohib…
A controlled ac Stark echo for quantum memories
B. S. Ham
A quantum memory protocol of controlled ac Stark echoes (CASE) based on a double rephasing photon echo scheme via controlled Rabi flopping is proposed. A double rephasing scheme of…
Analysis of controlled Rabi flopping in a double rephasing photon echo scheme for quantum memories
Rahmatullah, B. S. Ham
A double rephasing photon echo is analyzed for inversion-free photon echo-based quantum memories using controlled Rabi flopping, where the Rabi flopping is used for phase control o…