The universe updated its software, but my underground lab was shielded. Now the reality bubble is collapsing. Part 2

CHAPTER 2

LOG ENTRY: DAY 215

My first instinct as a highly trained, heavily credentialed physicist was to throw up.

I didn't quite make it to the bio-receptacle. I heaved a mixture of stomach acid and terrible instant coffee all over the grated metal floor of the control room.

I lay there for a minute, my cheek pressed against the cold aluminum grating, gasping for air that tasted like ozone and recycled copper. The sound of birds was gone. The smell of espresso and tourtière was gone. The warmth of a sunlit Montreal kitchen was completely obliterated by the low, mechanical thrum of the DIDP ventilation system.

I looked down at my left hand. No flannel shirt. Just the standard-issue blue Nomex flight suit. No silver wedding band. Just a pale, slightly shaky finger.

"Hypoxia," I wheezed, rolling onto my back. "Or carbon monoxide. Or a nitrogen leak."

I dragged myself up by the edge of the primary console, my legs feeling like they were made of damp sponge. When you hallucinate a completely different life where you aren't a lonely hermit hiding in a subterranean tin can, the logical conclusion is not "I traveled dimensions." The logical conclusion is "My life support is failing, and my dying brain is giving me a highlight reel of my greatest regrets."

I slammed my fist onto the environmental controls.

Oxygen: 20.9%. Carbon Dioxide: 0.04%. Nitrogen: 78%. Atmospheric pressure: 14.7 psi. Internal temperature: 18°C.

The air was perfect. I wasn't suffocating. I wasn't being poisoned. I was completely, metabolically healthy.

I wiped the spit off my chin with the back of my sleeve and swiveled my chair toward the telemetry terminal. The data stream from the five LEGO-housed sensors I had dropped into the heavy water tank was still scrolling down the screen.

I stared at the numbers from Sensor 3—the one floating exactly at the edge of the collapsing reality boundary. The exact one whose data feed I had touched right before I teleported to a kitchen that doesn't exist anymore.

The numbers were impossible, but they were right there.

There is a fundamental equation in quantum mechanics—the time-dependent Schrödinger equation. It describes how the quantum state of a physical system changes over time. It looks like this:

$$i\hbar\frac{\partial}{\partial t}\Psi(\mathbf{r},t) = \hat{H}\Psi(\mathbf{r},t)$$

The $\Psi$ (Psi) is the wave function. It represents the probability amplitude of the universe. It’s the math that says "reality is doing this right now." The $\hat{H}$ is the Hamiltonian operator, which represents the total energy of the system.

According to Sensor 3, the exact millisecond my finger touched the screen to lock the telemetry, the Hamiltonian of the incoming reality boundary spiked, and my local wave function... merged with it.

I didn't just hallucinate Sarah. The sensors confirmed a localized collapse of quantum superposition. Because I was actively observing the data of the invading timeline—the timeline where Forrest Gump speaks in the past tense, where Berenstain is spelled with an 'A', and where, apparently, I am not a miserable recluse—my consciousness temporarily entangled with the Elliot Vance of that timeline.

A "glitch in the matrix," delivered straight to my cerebral cortex via a plastic Han Solo.

"Okay," I muttered, my voice echoing in the empty lab. "Okay. That happened. That is a thing that happened."

I took a deep breath, trying to steady my racing heart. I needed to focus. If I didn't stop this, that reality was going to crush mine entirely. I would be erased. The Elliot in the flannel shirt would overwrite the Elliot in the Nomex suit.

Maybe that wouldn't be so bad. He seemed happy. He had Sarah. He had espresso that didn't taste like roasted dirt.

No, I told myself, slapping my cheeks with both hands to snap out of it. He's a mathematical anomaly caused by a cosmic software update. He didn't earn that kitchen. A shrill, piercing alarm shattered my internal monologue.

Red lights began strobing across the upper tier of the main console. I spun around to the heavy water tank telemetry.

WARNING: VESSEL PRESSURE CRITICAL.

"What?" I lunged for the keyboard. "How long was I out?"

I checked the internal chronometer. It had been forty-five minutes since I touched the screen. I had been unconscious—or mentally vacationing in Montreal—for three-quarters of an hour.

And in that time, the friction between the two collapsing realities had been working overtime.

The boundary of the new timeline was pressing inward against the 10,000 tons of ultra-pure heavy water ($D_2O$). Heavy water has a slightly higher boiling point than regular water—101.4°C. But the kinetic energy generated by two universes physically grinding against each other was dumping massive amounts of heat into the tank.

Fourier's Law of Heat Conduction dictates how heat transfers through a material:

$$\mathbf{q} = -k \nabla T$$

Where $\mathbf{q}$ is the local heat flux density, $k$ is the material's conductivity, and $\nabla T$ is the temperature gradient. The problem was, the temperature gradient was climbing exponentially. The outer edges of the heavy water were already boiling.

My pressurized living quarters sit right in the middle of this massive acrylic tank. The acrylic is two feet thick, rated for a maximum internal pressure of 150 psi.

The sensors read 144 psi.

And climbing.

If it hits 150, the tank shatters. If the tank shatters, 10,000 tons of boiling heavy water instantly floods my tin can, crushing me like a bug on a windshield. And even if by some miracle I survive the water, the loss of the shielding means the reality-overwrite wave will hit me instantaneously.

"Tabarnak," I yelled, scrambling out of the chair.

I needed to cool the water. Now.

The DIDP was designed to keep the heavy water at exactly 4°C, which is the temperature at which water is most dense. To do this, there is an industrial-grade liquid nitrogen ($LN_2$) cryo-cooler loop coiled through the bottom of the tank. Normally, it just pulses occasionally to keep the ambient temperature stable.

I sprinted to the thermal control panel. "Computer, engage emergency cryo-flush. Open the primary $LN_2$ dump valve."

The screen blinked.

ERROR: THERMAL REGULATOR VALVE 4 STUCK. MANUAL OVERRIDE REQUIRED.

"Of course," I screamed at the monitor. "Why would anything just work? This is exactly like the Water Temple in Ocarina of Time. Nothing but sheer misery and valves that refuse to open."

The $LN_2$ storage tanks and the primary valves weren't in the pressurized living quarters. They were in the sub-basement pump room, located directly beneath me, outside the primary environmental seal. It was kept at the ambient temperature of the mine shaft: roughly 5°C, and smelling heavily of nickel dust and damp rock.

I grabbed my heavy insulated jacket from the hook by the door, shoved my arms through the sleeves, and grabbed a heavy-duty steel wrench from my tool bench. I didn't bother zipping the jacket. I had maybe three minutes before the pressure hit 150 psi.

I threw open the floor hatch and half-climbed, half-slid down the steep metal ladder into the sub-basement.

The pump room was deafeningly loud. Massive turbines whined as they struggled to pump coolant that couldn't move. The air was frigid, and condensation dripped from the low ceiling. I flicked on my headlamp, the beam cutting through the gloom, and scanned the maze of frost-covered pipes.

"Valve 4, Valve 4..." I muttered, stepping over a thick bundle of fiber-optic cables.

I found it tucked behind the primary circulation pump. It was a massive, red, cast-iron wheel valve, coated in a thick layer of rime ice. The condensation in the air had frozen solid over the actuator mechanism, locking the gears in place. The automated servos were whining, trying to turn it, but the ice had cemented it shut.

I checked my watch. 147 psi.

I stepped up to the valve, gripped the red wheel with both hands, planted my boots on the diamond-plate floor, and pulled with everything I had.

It didn't budge a millimeter.

"Come on!" I grunted, straining until my vision swam. Nothing. I let go, panting, my breath pluming in the freezing air. I am a physicist, not a bodybuilder. My upper body strength is best described as "adequate for lifting textbooks." I needed mechanical advantage. I needed torque.

$$\tau = \mathbf{r} \times \mathbf{F}$$

Torque ($\tau$) equals the radius of the lever arm ($\mathbf{r}$) times the force applied ($\mathbf{F}$). Since I couldn't magically increase the force my puny arms could generate, I needed to increase the radius of the lever.

I looked around frantically. In the corner, discarded during the initial construction of the lab, was a length of hollow steel scaffolding pipe, about four feet long.

"Perfect."

I grabbed the pipe, hauled it over to the valve, and slid the hollow end over the handle of my heavy-duty wrench. I wedged the jaws of the wrench between the spokes of the frozen red wheel. I now had a four-foot lever arm.

I checked my watch. 149 psi.

I threw my entire body weight onto the end of the steel pipe. For a terrifying second, nothing happened. The metal groaned, flexing under my weight.

Then, with a sound like a gunshot, the ice shattered.

The wheel lurched downward, spinning freely as the automated servos finally took over and finished the job. A deafening whoosh echoed through the sub-basement as hundreds of gallons of liquid nitrogen, sitting at a balmy -196°C, flooded into the cooling jacket surrounding the heavy water tank.

I collapsed backward onto the metal floor, gasping for breath, staring up at the maze of pipes. The ambient temperature in the room plummeted immediately as the chill radiating off the pipes hit the air.

"Take that, entropy," I wheezed, letting my head fall back against the grating.

I dragged myself up the ladder and back into the control room. I collapsed into my chair and looked at the telemetry monitor.

The pressure had stopped climbing at 149.6 psi. As the $LN_2$ flash-froze the outer layers of the heavy water, absorbing the massive heat flux, the internal pressure began to rapidly drop. 145... 130... 110 psi.

I let out a long, ragged sigh of relief. I had done it. I had used basic thermodynamics to stop the reality-boil.

But as I sat there, my adrenaline fading, another sound caught my attention. It wasn't an alarm. It wasn't the hum of the ventilation. It was a sound that made the blood freeze in my veins.

CREEEEAAAK.

It was a deep, resonant groan, coming from the curved acrylic wall of the living quarters.

I pulled up the structural diagnostics.

When you take a material—even impact-resistant, two-foot-thick acrylic—that is currently being subjected to near-boiling temperatures on the outside, and you suddenly introduce liquid nitrogen into the cooling jacket surrounding it, you create a massive, instantaneous temperature differential.

Things expand when they get hot. They contract when they get cold. When one side of a material contracts violently while the other side is still hot...

SNAP.

A sharp, cracking sound echoed through the tin can.

I watched in abject horror as a spiderweb of white fractures suddenly materialized in the thick acrylic wall right next to my bunk, about three feet long.

I had stopped the boiling. But the thermal shock had just compromised the structural integrity of my only shield. And the reality-overwrite wave was still moving inward, now 4.2 centimeters closer than it was an hour ago.

I stared at the fracture, then at my empty mug of instant coffee on the floor.

"Okay," I whispered to the empty room. "No more liquid nitrogen."