Issue #00 Bandung, West Java
I'm a theoretical physicist at ITB. I work on open quantum systems — specifically, how you charge a quantum battery when the universe won't stop listening in.
Issue #01 · Origin
Before quantum anything, my first published work was a survey of the groundwater under Banua Buha Asri in Manado. We pushed current into the ground and read the resistance coming back, and from that you can tell where the aquifer is. Physics you can stand on.
Sam Ratulangi gave me the fundamentals and then a job teaching them — I was the lab assistant for Basic Physics at FMIPA UNSRAT, which mostly meant explaining to first-years why their error bars mattered.
Then Bandung. ITB, the Theoretical Physics Laboratory on Jalan Ganesha, and a question that doesn't fit in a borehole.
Issue #02 · Four scales
Six papers, thirteen citations, one question I apparently can't put down: where does the energy go, and how fast can you put it back?
2020 · Jurnal Ilmiah Sains 20(1) · cited 6×
Finding groundwater by pushing current through the earth and reading what comes back.
2021 · J. MIPA 11(1) 27 · cited 3× · first author
Optimising the temperature of a microwave-driven high-temperature heating system. Still energy in, energy out — now I'm simulating it instead of digging.
2023–2024 · three papers · cited 3× combined
Fuel chemistry with the Sangian group at UNSRAT — where ethanol, gasoline and kerosene agree to stay mixed, and what that does to the fuel parameters.
2025 · J. Phys.: Conf. Ser. 3139(1) 012068 · cited 1× · first author
The one this whole site is really about. Presented at the 14th International Physics Seminar, Jakarta, June 2025.
Issue #03 · The open system
A quantum battery is meant to beat a classical one by using quantum effects — charge faster, store better. Most of the encouraging results assume the battery is sealed off from the world. It never is.
So I model the charger and the battery as quantum harmonic oscillators and let them talk to their surroundings through the Lindblad master equation. Then I drive the charger periodically and watch the energy: how fast it goes in, whether it stays, and how much decoherence eats along the way.
Or, the way I put it when I finished: “Ngisi baterai kuantum sambil ngisi kesabaran.”
“Quantum batteries are designed to outperform classical batteries by utilizing quantum effects, particularly in charging speed and energy storage efficiency… the charger and quantum battery are modeled as a quantum harmonic oscillator, and their interaction is governed by the Lindblad master equation… we investigate the effect of periodic driving on energy charging, energy stability, and decoherence effects in the quantum battery.”
The first moments of the charger and battery obey a small system of coupled linear differential equations — the same shape as the ones in the paper. Drag the controls and watch the energy move.
peak battery energy 0.00 at t = 0.00
An illustration of how the model behaves, not data reproduced from the paper. Units are arbitrary; time is in units of the oscillator period.
Issue #04 · Superposition
“The state of the human heart is like a quantum state in which various feelings are superposed, a quantum state of feelings,” my professor said.
And when the Bandung nature made a “measurement”, the state of the heart that previously fulfilled quantum properties finally became classical, namely happiness.
But is it a permanent condition for me? Not necessarily, because in life another classic condition is needed.
Every measurement collapses the same superposition. The outcome is random; the distribution is not. Measure it enough times and the Born rule shows up on its own.
0 measurements
Issue #05 · Boarding passes
It seemed like the right unit for a degree: a seat, a date, and a destination you have to actually go to. So here is the whole itinerary.
Boarding pass · Leg 01
MDC BDO
He made these himself, both sides, and posted them the day he passed. Seat 09A — “Aku siap terbang tinggi (tanpa revisi)”.
Boarding pass · S2 completion
Dynamic External Field Effects on Quantum Battery Charging in the Open Quantum System Formalism
“Tesis judulnya panjang, isinya pusing, tapi yang penting sekarang statusnya: LULUS.”
Boarding pass · Leg 03
PMDSU Dr.
Boarding pass · Leg 04
BDO ???
“Next destination? Masih lanjut atau rebahan tiga hari tiga malam dulu.”
Unmeasured. Still in superposition.
Issue #06 · Power set
Also known as
M.Si — Master of Sabar & insomnia
Known abilities
Base of operations
Theoretical Physics Laboratory
FMIPA, Institut Teknologi Bandung
Jl. Ganesha 10, Bandung 40132
Known associates
Prof. Freddy Permana Zen
Jusak Sali Kosasih
Donny Dwiputra
